Your wastewater is one of the key sources used to identify the presence of the COVID-19 virus in your local community because plumbing is public health
COVID-19 has been a wake-up call for every level of government in Australia. The pandemic has reiterated that plumbing is all about public health. With vaccination rates being hailed as our pathway back to the new normality, we need politicians and bureaucrats to embrace that plumbing protects the entire community and individually plumbers preserve the nation’s health.
A pivotal component in managing COVID-19 is establishing where transmission of the virus occurs. Since the beginning of the pandemic in early 2020, the identification of exposure sites by health authorities and the requirement for people who were at the same areas during the same time to monitor for symptoms or get tested themselves have been a ceaseless part of the public health response.
Wastewater testing has been crucial for health departments to identify where COVID-19 may be present in the community to help to stop the spread.
Wastewater or the used water from toilets, sinks, showers, baths, basins and dishwashers are analysed and tested for fragments of SARS-CoV-2, the virus that causes COVID-19.
Fragments of the virus potentially enter the wastewater system through people who have or have recently had COVID-19. People shed the virus fragments through toilet paper, used tissues, off their hands and skin or in faeces. This shedding can continue for weeks after a person is infectious.
“The COVID-19 virus, SARS-Cov-2, can enter wastewater infrastructure through any of those means. However, it is likely to enter wastewater principally from faecal and respiratory shedding. Shed virus is then detected by analysing the wastewater using analytical methods that are specific for SARS-CoV-2,” says Dr Nick Crosbie, Recycled Water and IWM Research Manager at Melbourne Water.
“Wastewater monitoring is equivalent to obtaining and analysing a large community-based composite sample of faeces, saliva, vomit, sputum, urine, shed skin and other material shed during personal cleansing, washing, bathing, and excreting.”
Throughout Australia, wastewater samples are taken from wastewater treatment plants, regional wastewater treatment plants and multiple locations throughout any metropolitan sewerage system.
Dr Crosbie describes surveillance as dynamic, adjusting it to meet changing needs such as surge testing during outbreaks.
“Samples are obtained by ‘grab sampling’, auto-sampling, and by the deployment of so-called ‘passive samplers’ which accumulate the SARS-CoV-2 virus in the period of their deployment. Between a few 100 to more than 1,000 samples are collected and processed in a seven-day period. The samples are analysed of the passive samplers with presumptive detections confirmed by third-party analysis.”
Wastewater testing has come to public prominence during the pandemic, although it has been regularly undertaken worldwide to monitor poliovirus, norovirus and adenovirus for close to twenty years.
Dr Crosbie says the public identification of locations in which viral fragments are identified in wastewater – announced by the Department of Health regularly, including sending text messages to people in affected postcodes – allows health authorities to target their responses.
“Information can be used by health departments to focus their investigations further and to encourage an increase in local clinical testing rates,” he says.
The role of plumbers in effective wastewater testing is critical. The provision of safe and effective plumbing and sanitation illustrates how plumbers contribute to strengthening public health. Master Plumbers CEO Peter Daly is unequivocal in stating that “Plumbers play a vital role in developing, maintaining and promoting public health among the community. Plumbers prevent against disease and illness stemming from poor plumbing and sanitation and against the dangers of unsafe gas appliances, some of which can be deadly. Our day to day work in plumbing and sanitation also supports the overall wastewater testing process to play a big role in the COVID-19 response.”
Dr Crosbie agrees, “the COVID-19 wastewater surveillance program is a huge team effort between people working in the plumbing industry, water industry, and the laboratory and health sectors,” he says.
Dr Crosbie understands that plumbing is public health, “More generally, the safe operation of our water and wastewater infrastructure ensures that the community do not suffer from significant health effects from water and wastewater-borne diseases.”
The World Health Organisation and leading doctors state that the world’s most significant medical milestone since 1840 was sanitation. Despite the tremendous medical breakthroughs and scientific advances, the seemingly mundane advance of reliable sewage and reliable, clean water supply is the most significant medical advance over the last 200 years.
May, June and July are the coldest months on the Gold Coast, and no-one wants to start the day with a cold shower in winter. Unluckily for some clients of Whywait Plumbing who are not Service Partners it is in these months they go to the shower and question why do I not have hot water?
Unfortunately, hot water systems are a case of out of sight out of mind. Continually where hot water systems are concerned, there were warning signs that there was a problem. Over the summer months, hot water problems are overlooked as the demand for higher temperature; hot water is not a critical consideration.
Several warning bulletins in Queensland have been issued by the QBCC and Queensland Health advising homeowners that their hot water systems need to be maintained and serviced frequently.
AS/NZS 3500.4:2018 Heated Water Services
The Australian standard that all hot water installation is based around is AS/NZS 3500.4:2018 Heated water services that are an integral part of the National Construction Code of Australia issued by the Australian Building Codes Board and it is all legal requirements in Queensland.
In AS/NZS 3500.4:2018 there is Appendix M which provides guidelines for the operation and maintenance of your hot water system which is below:
M1 SCOPE
This Appendix provides guidelines for the operation and maintenance of a heated water system. M2 GENERAL
In order to ensure maximum performance and length of operation, water heaters should be inspected periodically. M3 MAINTENANCE OF HEATED WATER SERVICES
Heated water services should be maintained in accordance with the following:
(a) Water treatment units:Where installed, water treatment units should be inspected periodically to ensure proper operation.
(b) Water vessels and tanks: All vessels and tanks should be inspected and cleaned periodically, and in accordance with any requirements of the regulatory authority. NOTE: The frequency of periodic cleaning depends upon the quality of the supply water, design, materials of construction and the pipe system. Combinations of materials giving rise to corrosion should be avoided.
(c) Valves: The following valves should be inspected periodically to ensure proper operation:
(i) Temperature/pressure-relief valves.
(ii) Expansion control valves.
(iii) Thermostatic mixing valves.
(iv) Tempering valves.
(v) Other associated valves/devices.
(d) The requirements of AS/NZS 3666.2, where applicable.
Common reasons for why do I not have hot water
Below are listed the most common reasons we attend to clients jobs who call up to as why do I not have hot water? Listed are elementary troubleshooting ideas that you can undertake yourself to resolve or understand why your hot water is cold:
blown fuse or circuit breaker – replace the fuse or reset the circuit breaker and if it blows again it’s probable there is a fault with your element or thermostat, and you need to call Whywait out to repair
Energex relay switch failure – this is not the easiest to detect but if you are on off-peak rates and there are no obvious electrical faults or water leaks then its worth a phone call to your energy supplier to check whether the relay switch has failed to activate in your area
defective relief valve – most relief valves on the side of the HWS only have a life span of around 3-5 years. Still, they can jam open so first check if you see water running from it by pulling the lever up and then easing back down again. If water continues to run then you need to call Whywait out to service the unit
no water at all – this is when you wake up turn the tap on and cold water flows, but there is no flow from the hot water. Frequently this a failure of the non-return or isolating valve and a quick way to check is to turn the handle on the valve all the way off and then all the way back on. In many cases, the hot water will simply begin to flow again. However, if there is still no flow you need to call Whywait out for repairs
water fluctuation from hot to cold – there are several reasons for this occurring, but the most common is a faulty tempering valve. There is nothing you can do to solve fluctuation other than call Whywait and read our information on tempering valves
water leaking from hot water tank – there is only a maximum of 7 possible points on an HWS tank where there are joints that can possibly leak. Only 2 of those are concealed in the housing so if the water is leaking from the tank and its not from the visible water connections you need to call Whywait for service to check the HWS. In all likelihood, if the hot water tank is more than ten years old then its a 50/50 chance you need a new one installed
DIY warning
The above reasons are the most common problems you will experience with why do I not have hot water. As you can see above, there are only a few simple DIY solutions when you have no hot water.
A word of warning though. Please never open up the housing near the bottom of the tank where the electrical connections are as they are all live wires inside there and therefore very, very dangerous.
Whether you have a solar, heat pump, gas or electric hot water system they do need periodic maintenance so for all hot water problems call Whywait Plumbing now on (07) 5580 4311 as we guarantee a same-day rapid response for hot water problems.
I recently had a client comment that Gold Coast Plumbers bury their mistakes far more than doctors bury their mistakes. It is a comment I cannot disagree with in any way. Increasingly we see underground plumbing work that is so non-compliant it’s confirming Gold Coast Plumbers bury their mistakes, knowingly and deliberately.
Calling them mistakes is not being truthful because we all know it’s a deliberate act to cut costs. We all understand those plumbing companies that choose to undertake construction work are under enormous competitive pressure to reduce construction costs continually.
However, because of these plumbing companies buckling to pressure from project managers, builders and developers, they are in an ever downward spiral of negligently breaking the law. The reality is all of the parties involved in the lawbreaking know the chances of them getting caught are slim as the inspections by City of Gold Coast’s plumbing, and drainage inspectors are cursory at best.
Underground water pipes, house sewer drains and house stormwater drains are all buried underground. Unfortunately for property owners, it can take years before the problems become apparent and they investigate the issue. By this time the original construction job is out of warranty, and the QBCC will show little interest in any investigation of negligence.
Investigation and rectification of non-compliant installation of underground plumbing infrastructure fall onto the hapless property owner. Rectification bills can be enormous, and the likelihood is there is no insurance coverage or any desire by the council or state regulatory authorities to investigate.
I believe we have the best plumbing regulations and standards in the world. We used to have the best enforcement in the world to ensure our buildings met the high standards required. The enforcement of the Plumbing and Drainage Act of 2018 and the preceding laws have become so lax that most buildings constructed in the last twenty years have multiple underground plumbing defects. Disastrously for property owners, the majority of these defects are waiting to break down and cause havoc finally.
When these buried mistakes are covered by insurance and break down, causing water damage, every one of us bears a cost via ever-increasing property insurance premiums on all buildings. If enforcement had occurred at the construction stage, then this water damage would have never happened.
It is our experience as maintenance plumbers that builders and developers perceive they can reduce costs and increase profits by not complying with the Plumbing and Drainage act of 2018.
The legal obligations of complying with the Plumbing Code of Australia, which is Volume 3 of the National Construction Code, is not even a consideration.
I accept this lack of compliance has come about due to multiple factors and pressures. Nevertheless, this short-sighted attitude and systematic non-compliance with what is the law affects property owners with prodigious rectification costs. I believe that the project managers, builders, developers and plumbers involved in this ongoing fraud of property owners and insurance companies are well aware of what they are doing but blame it on:
Competitive pressures in the construction industry where the lowest price wins mentality rewards plumbers who take non-compliant short cuts to reduce costs to win jobs
All builders actively forcing cost-cutting on sub-contractors and suppliers
Time constraints on plumbers to complete the job and be paid
The reluctance of builders to inform clients that unforeseen issues have arisen which will increase the cost of construction
The failure of building certifiers and plumbing inspectors to defect non-compliant work and the turning of a blind eye to incorrectly graded trenches, lack of compaction and inappropriate backfilling of trenches
Continual lack of enforcement by the Queensland Government regulators
Every one of the above has in their view a justifiable excuse for what is occurring but all that is required is for the law to be obeyed. The Plumbing and Drainage Act of 2018 and the Plumbing and Drainage Regulation 2019 merely need to be enforced to stop Gold Coast Plumbers bury their mistakes attitude continuing.
By enforcing the law, everyone is a winner and will return us to the standards that previously existed where non-compliant work was defected without a second thought. Every plumber I discuss this with would be more than happy with this to occur as it would create a level playing field for the plumbing industry where efficiency was rewarded rather than non-compliant short cuts. It further protects property owners and the entire construction industry that is already under a cloud due to the cladding non-compliance in buildings throughout Australia.
As licensed plumbers, we are mindful that non-compliant plumbing is a public health risk. I reiterate most of the non-compliant work is knowingly and deliberate which is ultimately negligent behaviour. Sooner or later insurance companies and no-win no-pay lawyers will awaken to the fact that this non-compliance is negligence resulting in the plumbing industry as a whole is portrayed as cowboys with no integrity ripping off poor property owners.
This is a scenario where no one wins except the lawyers. As a critical industry plumbers cannot allow a perception that plumbers as a whole are unable to undertake legally compliant work. We certainly need no more regulation we just need the existing laws and regulations enforced to protect the community’s health as a whole.
We often receive questions from clients regarding why we charge them for Form 4. The straightforward answer is that it is required by law.
The Form 4 system for plumbing and drainage work has existed for over two decades.
Initially, licensed plumbers had to submit Form 4 to local authority plumbing inspectors. For those on the Gold Coast, this meant submitting the form to the City of Gold Coast’s Plumbing and Drainage section when replacing part of the sewer house drain, water main, or hot water service.
In 2012, legislative changes mandated plumbers lodge Form 4 with the Department of Housing and Public Works through the Plumbing Industry Council (PIC). This was the first time a fee was introduced for lodging a Form 4, which amounted to $25.90. In 2014, the Queensland Building and Construction Commission (QBCC) assumed responsibility for the Form 4 process as part of their role in overseeing occupational plumbing licensing.
Once Form 4 is submitted, it may be subject to a random compliance audit to ensure the work adheres to the Plumbing and Drainage Act 2018 and the Plumbing and Drainage Regulation 2019. This process guarantees that work is carried out to the highest standards, safeguarding everyone’s well-being, health, and safety.
Whywait Plumbing has always been a proponent of the Form 4 process, as it ensures that all work on your property is compliant and registered with both the QBCC and the City of Gold Coast. In the event of a significant insurance claim involving plumbing failure, an accessor can easily trace the work to confirm that it was performed legally and in compliance with regulations.
In essence, Form 4 serves to protect homeowners.
Which areas of plumbing & drainage work are classified as notifiable work?
The definitions of notifiable work were updated on 1 July 2019 to ensure clarity and usability and establish cost-effective plumbing laws and regulations for both plumbers and property owners.
Twelve primary categories of notifiable plumbing and drainage work necessitate a Form 4:
Extending water supply pipes – involves work on water reticulation pipes other than fire services in existing buildings.
Extending or removing a fire service – applies to class 2-9 buildings with development approval as per schedule 2 of the Building Act 1975.
Existing sanitary plumbing – pertains to work in existing buildings where sanitary plumbing is removed, replaced, altered, or extended.
Existing sanitary drainage – concerns work on existing class 1 to class 10 buildings involving extension, replacement, alteration, or removal of any part of the sanitary drain system (excluding a combined sanitary drain). This also applies to extensions or alterations to a class 1 building.
Temperature control devices – includes work with thermostatic mixing valves (TMVs) or tempering valves in existing buildings that require installing, replacing, or removing a valve. This also applies to extensions or alterations to a class 1 building.
Water heaters – involves work in existing buildings requiring installing, replacing, or removing a hot water heater. This also applies to extensions or alterations to a class 1 building.
Backflow prevention devices – work with testable backflow devices or dual check valves in existing buildings that require installing, replacing, or removing a valve. This also applies to extensions or alterations to a class 1 building.
Greywater treatment plants – pertains to work involving installing a greywater use system that includes a greywater treatment plant installed in a sewered area where the plant generates less than 3kL of greywater daily or for replacing a greywater plant.
Fixtures in class 1 or class 10 buildings – include work required for installing a new fixture or relocating an existing fixture in class 1 or class 10 buildings. This also applies to extensions or alterations to a class 1 building.
Fixtures for class 2 to 9 buildings of 1 or 2 storeys – applies to all work other than sanitary drainage required for installing or relocating a fixture, provided the work is for an existing class 2 to 9 building up to two storeys above ground.
Sanitary drains – involves sealing a sanitary drain after the connection point to the council sewer or a treatment plant.
Sealing supply pipes – includes work to seal a water supply pipe after the council water meter, provided the work is for an existing class 2 to class 9 building.
The QBCC provides easy-to-understand guides on notifiable work and the definitions of building classes as outlined in the Building Code of Australia, which can be downloaded below:
Every reputable professional plumber I know wholeheartedly supports the notifiable work system. This support ensures that homeowners and property owners can trust that all work carried out on their property adheres to the required standards.
If you have had plumbing or drainage work done and have not been provided with a Form 4, as shown above, and the work falls under the listed categories, you should report it to the QBCC immediately or call them at 139333. High-quality plumbing and drainage work is essential for protecting your health.
If you are uncertain or need assistance, don’t hesitate to contact us at (07) 5580 4311; we will offer our opinion. Ultimately, all plumbing work is not about guesswork but compliance with the law, specifically the Plumbing and Drainage Act 2018.
Unlicensed DIY plumbing work has never been legal in Queensland. Unfortunately, too many people think because they can buy plumbing products at Bunnings, then they can carry out the installation or repairs as well. In reality, the ability to undertake unlicensed plumbing work is extremely restricted in Queensland.
Technically DIY plumbing is classified as “Unregulated work” in Schedule 3 of the Plumbing and Drainage Regulation 2019 which was called into law on 1 July 2019.
So the “Unregulated work” that an unlicensed person can undertake in respect to plumbing work is not a great deal and for a good reason, as outlined below. Specifically, in Schedule 3, Unregulated work generally is defined as the following work for premises necessary for the following:
replacing a shower head or domestic water filter cartridge
replacing a jumper valve or washer in a tap
repairing or replacing a drop valve washer, float valve washer or suction cup rubber in a toilet cistern
replacing caps to ground level inspection openings on a sanitary drain
cleaning or maintaining a ground-level grate for a trap on a sanitary drain
installing or maintaining an irrigation or lawn watering system downstream from a tap, isolating valve or backflow prevention device on the supply pipe for the watering system
repairing or maintaining an irrigation system for the disposal of effluent from a greywater use facility or on-site sewage facility
And those seven tasks listed above are the only legal DIY plumbing jobs that you may undertake without a plumbing licence. The only other exception to this is what is referred to as incidental unskilled tasks such as excavating or backfilling a trench
In Queensland, all plumbing work is legally required to be carried out under the Plumbing and Drainage Act 2018, Plumbing and Drainage Regulation 2019, Standard Plumbing and Drainage Regulation 2003 and Queensland Plumbing and Waste Water Code 2019. These acts and regulations are comprehensive in their requirements and outcomes concerning individual plumbing licences and training.
In addition, the Plumbing and Drainage Act 2018 calls into law The Plumbing Code of Australia. This is defined as the document in force from time to time called “National Construction Code volume 3 – Plumbing Code of Australia published by the Australian Building Codes Board. The Plumbing Code of Australia covers every aspect of plumbing and drainage setting out the minimum requirements for the construction, installation, replacement, repair and maintenance of all plumbing systems, specifically:
Water services
Sanitary plumbing and drainage systems
Excessive noise
Facilities
To be a plumbing contractor in Queensland, a company or individual must also hold appropriate contractors licences by the QBCC under the Queensland Building and Construction Commission Act 1991.
This is in addition to a plumbers occupational licence that allows us at Whywait Plumbing to lawfully carry out particular plumbing or drainage work. This licence ensures that all plumbing contractors have the correct technical qualifications and occupational license. No one other than a licensed plumbing contractor can undertake plumbing work no matter what the value of the work is. The threshold amount of $3000 does not apply to plumbing, drainage or gasfitting that applies to several other trades with QBCC licenses.
It is not worth the risk to undertake unlicensed DIY plumbing. It is illegal, plus it potentially voids your insurance coverage.
Plumbing laws nationwide safeguard the health of the nation. Plumbing is public health, now, and in the future.
A burst flexi hose is a job we attend to almost every day. In all likelihood, you will have multiple flexi hoses in your home. They will exist commonly in both residential and commercial buildings under the kitchen sink, under the bathroom vanity basins, under the toilet cistern and under the laundry tub. Invariably when we attend to a burst flexi hose it has been damaged during installation causing kinking and has further experienced corrosion. Almost always the burst flexi hose was a time bomb waiting to happen. The braided stainless steel “simple to install” flexi hose has over the last 10 years replaced copper pipe connections to taps and toilet cisterns. Unfortunately, the braided stainless steel flexi hose has not lived up to expectations and delivered on the rust protection anticipated. In our experience, a burst flexi hose is caused by:
incorrect installation with multiple kinks in the braided stainless steel
stretching of the flexi hose to make the connection fit
chemical attack from household cleaners
All of the above can create the perfect storm scenario in causing the braided stainless steel to corrode and rust. It then is just a matter of time until the stainless steel braiding fails which allows for the inner liner to burst. Here at Whywait Plumbing, we are now installing a polyamide hi class water hooker from Abey Australia which is the most technologically advanced flexi hose we have seen come onto the market. The Abey polyamide hi class water hooker cannot rust or corrode as it uses polyamide braiding that is similar to the Kevlar used in bulletproof vests. The connectors are manufactured from brass alloy so the entire flexihose will never rust even if its continually in contact with chemicals such as chlorine.
We are confident you will never experience a burst flexi hose once we install the Abey polyamide hi class water hooker as they literally cannot rust and cannot kink but best of all they come with a 15-year rust resistant warranty. Kinking is often the cause of a burst flexi hose but cannot occur with the Abey polyamide hi class water hooker. Kinking is simply poor installation as a result of over tightening the connector which twists the stainless steel braided hose. This over tightening creates pressure and tension in the braiding which frequently results in the inner liner bursting through the braiding and rupturing. The Abey polyamide hi class water hooker has a simple design to ensure that it is anti-kink. When we install the Abey polyamide hi class water hooker we are able to use two spanners to counteract any twisting that results in kinking.
Most of the flexi hoses currently used have an inner lining manufactured from EPDM which has the potential to absorb and release harmful chemicals such as chlorine into your drinking water. This ability to absorb chemicals also results in a potential burst flexi hose. With the Abey polyamide hi class water hooker the inner lining is manufactured from Softpex Core. The Softpex Core inner liner gives a superior mechanical performance to EPDM guaranteeing a longer life due to its higher tensile strength, higher abrasion resistance, higher working water pressure and non-corrosiveness. The extensive age/stress testing undertaken resulted in an amazing 0% failure rate.
We strongly recommend that you get us to check your flexi hoses every year for rust and/or corrosion and that they are replaced every five years. This will give you the peace of mind in knowing that the flexi hose in your home or business is not rusting and about to explode releasing water at 25 litres every minute that it flows. Rust is the #1 enemy of a braided stainless flexi hose.
When we replace your existing stainless steel flexi hoses with the Abey polyamide hi class water hooker we guarantee you will get:
superior strength and corrosion resistance
tested and WaterMark approved for use in Australia
superior tensile strength
superior working water pressure
a superior mechanical performance with the Softpex core inner liner
a 15-year rust resistant warranty from the manufacturer
As always we must caution you that installing or replacing a flexi hose is not a legally compliant DIY installation and under Queensland law must be done by a licensed plumber. You need to be aware that undertaking a DIY installation has the likelihood of making your insurance coverage null and void and the manufacturer’s warranty null and void if the flexi hose bursts and causes damage. Don’t wait for the ticking time bomb of your existing stainless steel braided flexi hoses to strike! Call us now to get us to upgrade you to the Abey polyamide hi class water hooker.
Below are listed the most common reasons we attend to clients jobs who call up to as why do I not have hot water? Listed are elementary troubleshooting ideas that you can undertake yourself to resolve or understand why your hot water is cold:
Unlicensed DIY plumbing work has never been legal in Queensland. Unfortunately, too many people think because they can buy plumbing products at Bunnings, then they can carry out the installation or repairs as well. In reality, the ability to undertake unlicensed plumbing work is extremely restricted in Queensland.
A burst flexi hose is a job we attend to almost every day. In all likelihood, you will have multiple flexi hoses in your home. They will exist commonly in both residential and commercial buildings under the kitchen sink, under the bathroom vanity basins, under the toilet cistern and under the laundry tub. Invariably when we attend to a burst flexi hose it has been damaged during installation causing kinking and has further experienced corrosion. Almost always the burst flexi hose was a time bomb waiting to happen. The braided stainless steel “simple to install” flexi hose has over the last 10 years replaced copper pipe connections to taps and toilet cisterns. Unfortunately, the braided stainless steel flexi hose has not lived up to expectations and delivered on the rust protection anticipated. In our experience, a burst flexi hose is caused by:
Abey polyamide hi class water hooker cannot rust or corrode as it uses polyamide braiding that is similar to the Kevlar used in bulletproof vests. The connectors are manufactured from brass alloy so the entire flexihose will never rust even if its continually in contact with chemicals such as chlorine.
pressure and tension in the braiding which frequently results in the inner liner bursting through the braiding and rupturing. The Abey polyamide hi class water hooker has a simple design to ensure that it is anti-kink. When we install the Abey polyamide hi class water hooker we are able to use two spanners to counteract any twisting that results in kinking.
chlorine into your drinking water. This ability to absorb chemicals also results in a potential burst flexi hose. With the Abey polyamide hi class water hooker the inner lining is manufactured from Softpex Core. The Softpex Core inner liner gives a superior mechanical performance to EPDM guaranteeing a longer life due to its higher tensile strength, higher abrasion resistance, higher working water pressure and non-corrosiveness. The extensive age/stress testing undertaken resulted in an amazing 0% failure rate.
