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Frequently Asked Questions.

  • What is High Pressure Water Jet Rodding?

    High pressure water jet rodding, drain clearing, jet rodding, or water jetting, is conducted by placing a high-pressure hose into the offending drain. Water is then pumped down the hose from a self-contained jetting machine, creating a stream of water that is powerful enough to break down any congestion in the pipes for example grease, tree roots and even concrete.

  • Is there a relevant Australian Standard that covers high pressure water jetting?

    The AS Standard is AS 4233 High Pressure Water Jetting Systems Parts 1&2, this standard is available for purchase through Standard Australia. All MACRO Plumbing contractor’s and employees are trained and licensed in to Operate a High Pressure Water Jetting system MSMSS00004 and Operate A Drain Cleaning System MSMSS00005.

  • What is a Class B pump?

    High pressure water jetting systems with an output capability greater than 800 bar litres per minute and less than 5600 bar litres per minute are identified as Class A. Systems with an output capability more than 5600 bar litres per minute are identified as Class B. To establish the pump’s rating multiply the pump’s maximum flow in litres per minute by the maximum pressure in bar. Example: A high pressure water jetting pump with a maximum flow of 20 litres per minute and a maximum pressure of 2000bar has an output of 40,000 bar litres per minute. It is rated as a class B pump. Calculations are worked out using the HPWJ Pump’s maximum pressure and flow as identified on the pump compliance plate.

  • Do my operators need to be trained to operate a Class B pump?

    Yes, all operators operating Class B High Pressure Water Jetting equipment need to be trained to national standards and deemed competent.

  • Are nylon whip checks a suitable means of hose restraint?

    No, as there have been several high consequence injuries associated with the failure of these devices. AUSJET recommend the use of braided stocking hose restraints only. These restraints can either be wire or synthetic braided.

  • How much does a plumber cost?

    Whenever you hire the services of a plumber for any plumbing work in your home, you want to be sure that the person has the skills and ability to tackle the job expertly. You need high-quality solutions without having to pay large amounts of money for it. While you do not wish to compromise on the quality aspect, you still want to ensure that the person is not overcharging you for the job. So exactly how much does a plumber cost?
    It is crucial to understand that there is a wide variation in the cost of plumbing services. This is because various companies would have different pricing structures. Some charge by the hour while others charge per job. Also, it is necessary to know that someone who charges meagre rates for a particular task may not always provide the best quality. Similarly, someone that charges very high costs need not always be the best.
    The cost of any plumbing work would depend on the severity of the issue. Sometimes the plumber may charge higher rates for urgent fixes. The area you live in is another aspect that has a bearing on the plumbing cost. The best way to be sure about what you are paying and to be comfortable with that cost is to compare plumbing companies based on price as well as their experience, licensing, and reputation before hiring them so that you get the best quality at the best price.

  • DIY plumbing in QLD?

    If in doubt use a licensed plumber always. Most plumbing work undertaken in Queensland is regulated and requires a QBCC licensed plumber or drainer to undertake the work. This is to protect the community's health and safety. However, there is some plumbing work that is unregulated for example tap washers and cistern outlet rubber seals. These minor unregulated works can be done by anyone with the appropriate knowledge and level of skills. If unsure always engage a licensed plumber.

  • What is the most important part of plumbing?

    Protecting the potable water supply of everyone, the drainage system and any gas fitting. Outside of a clogged toilet, the drainage system is a key part of your plumbing system that might cause a costly emergency. Your drains connect the plumbing fixtures to the waste removal lines and the sewage system upholding the health and safety of everyone.

  • Why use an experienced plumber?

    Plumbing work is defined in the Australian Standards (AS3500) Regulations 2013 and refers to any operation, work or process in connection with installation, removal, demolition, replacement, alteration, maintenance or repair to the system of pipes and fixtures that conveys clean water into and liquid waste out of a building.
    To become a licensed plumber a four year apprenticeship and a Certificate III in Plumbing is required. As part of this course, instruction in the basics of gas fitting will be undertaken. Upon completion, these basics in gas fitting will allow the plumber to not only apply for their plumbing license but also an interim gas license, and carry out gas work under the supervision of a fully qualified gas fitter.
    To obtain a full gas license from the Department of Mines and Energy, the plumber will need to have worked on an interim gas license for a minimum period of twelve months and successfully completed a Certificate IV in Plumbing.
    MACRO Plumbing contractor’s have undertaken a minimum of 5 year’s training and many more years of experience with quarterly professional development required.

  • What is backflow and why do I need annual testing?

    A backflow prevention device is used to protect potable water supplies from contamination or pollution due to backflow.
    In water distribution systems, water is normally maintained at a significant pressure to enable water to flow from the tap, shower, or other fixture. Water pressure may fail or be reduced when a water main bursts, pipes freeze, or there is unexpectedly high demand on the water system (for example, when several fire hydrants are opened). Reduced pressure in the pipe may allow contaminated water from the soil, Gold Coast canals, from storage, or from other sources to be drawn up into the system.
    Backflow means the undesirable reversal of flow of a liquid, gas, or suspended solid into the potable water supply; a backflow preventer is designed to keep this from happening. Points at which a potable water system connects with a non-potable water system are called cross connections. Such connections occur naturally in appliances such as clothes washers and dishwashers, but they must be carefully designed and installed to prevent backflow. Another common location for a backflow preventer is the connection of a fire sprinkler system to a water main, to prevent pressurized water from flowing from the fire suppression system into the public water supply.
    Back-siphonage occurs when higher pressure fluids, gases, or suspended solids move to an area of lower pressure fluids. For example, when a drinking straw is used to consume a beverage, suction reduces the pressure of fluid inside the straw, causing liquid to move from the cup to inside the straw and then into the drinker's mouth. A significant drop of pressure in a water delivery system creates a similar suction, pulling possibly undesirable material into the system. This is an example of an indirect cross-connection.
    Back-pressure occurs for example when air is blown through the straw and bubbles begin to erupt at the submerged end. If instead of air, natural gas had been forced into a potable water tank, the gas in turn could be carried to a kitchen faucet. This is an example of a direct cross-connection, with undesirable material being pushed into the system.
    Back pressure can force an undesirable contaminant to enter potable water piping. Sources of back pressure may be boilers, heat exchanging equipment, power washing equipment, fire sprinklers, or pumps in the water distribution system. In some cases there may be an almost continuous risk of overcoming the static water pressure in the piping. To reduce the risk of contamination, a backflow preventer can be fitted. A backflow preventer is also important when potentially toxic chemicals are used, for instance for commercial/industrial descaling of boilers, or when chemical bleaches are used for residential power washing.
    A closely related device is the backwater valve, which is designed to prevent sewage from backing up into a building and causing basement flooding.[1] Preventative Devices required and outlined in AS/NZS 3500.1:2021 Section 4
    Backflow prevention device,br> The simplest, most reliable way to provide backflow prevention is to provide an air gap. An air gap is simply an open vertical space between any device that connects to a plumbing system (like a valve or tap) and any place where contaminated water can collect or pool. A simple air gap has no moving parts, other than flowing water. Many plumbing codes specify a minimum air gap distance required for various circumstances, such as a drain connection for a dishwasher, e.g., BS 6282. Alternatively, a specialized backflow preventer valve may be installed at strategic locations in the plumbing system wherever there is a risk of contaminated fluids entering the water supply pipes. These valves are used where there is not sufficient vertical clearance or physical space to install an air gap, or when pressurized operation or other factors rule out use of an air gap. Because these valves use moving parts, they are often required to be inspected or tested periodically.
    Regulatory requirements
    To prevent contamination due to back pressure, many health regulatory regimes require an air gap or mechanical backflow prevention assembly between the delivery point of mains water and local storage or use. Where submerged mains inflow is permitted, a backflow prevention assembly is required, which protects the potable water system from contamination hazards. A check valve is a basic form of backflow prevention, but often more complex devices are required because check valves are not considered to be reliable, when compared to more sophisticated devices with redundancies and reduced-pressure zones.
    In many countries. approved backflow prevention assemblies are required by law, and must be installed in accordance with plumbing or building codes.[ A typical backflow assembly has test cocks and shut-off valves, and must be tested when installed, if relocated or repaired, and also on a periodic basis.[
    Many states and/or local municipalities require annual testing of backflow prevention assemblies. In most cases, the law requires a double check (DC), reduced pressure principle device (RP) device, or an air gap when backflow prevention is mandated.
    Partial list of backflow prevention devices and assemblies
    • Air gap (AG the purest form of backflow prevention)
    • Atmospheric vacuum breaker (AVB)
    • Check valve (usually not a legally approved method of backflow prevention.)
    • Chemigation valve (primarily used in agriculture)
    • Double check valve assembly (DCVA)
    • Dual check valve (A dual check is not a testable device and is mainly used on residential customers)
    • Pressure vacuum breaker assembly (PVB)
    • Reduced pressure zone device (RPZ)
    • Spill resistant pressure vacuum breaker assembly (SPVB)
    • Vacuum breaker

  • 10 Questions To Consider With Your New Plumber

    Are They A Licensed Plumber?
    When you are considering hiring a plumber you should first establish whether they are licensed. If a plumber is licensed, then this will prove that they are professional enough to cope with all types of plumbing-related issues. If you gamble on using an unlicensed plumber there is a much greater chance of their work being unsatisfactory, illegal and compromising the health and safety of all. As a consequence, the existing problem will still remain, and you’ll then have the stress of having to hire another plumber.
    Have They Got Insurance?
    Like licensing, insurance should be something that covers a plumber – and you. Insurance should cover anything from accidents to mistakes, and even theft. Without insurance a plumber is likely to be more selective about what type of job they are prepared to tackle.
    How Long Will You Take Before You Start A Job?
    This can be a crucial consideration when you hire a plumber. If you have a blockage overflowing badly or a leak, for instance, a quick response time is vital. Even if you are insured, watching your home flood is never less than a stressful experience. If you’re not insured the difference, in monetary terms, between a plumber who arrives quickly, and one who doesn’t, can be enormous. It can also be the difference between being able to stay in your home or having to move into temporary accommodation.
    Does Their Service Operate 24/7?
    It’s sensible to make a note of legitimate plumbers, and the differences between those that undertake around the clock emergency service and those that carry out non-emergency work. The latter will usually not visit a property in an emergency, or be available 24/7, while the former will be, but won’t normally come out for minor problems.
    What Are Their Specific Areas Of Expertise?
    Even good plumbers will be better equipped at dealing with some problems than others. By ensuring that you have the best plumber for a particular job it makes sense to ask them what they specialize in.
    Do they Have Any References and a good reputation in the Industry?
    A good, experienced plumber should have several positive references. While, if they belong to a trade organisation such as the Master Plumbers Association of Queensland, this will under line their commitment to their job and have signed on to act with honesty and integrity.
    How Much Do They Charge?
    The specialist nature of plumbing contractors means that you can expect to have to pay different prices for different jobs. Calling out a plumber in an emergency will also be more expensive than would be the case with a simple job.
    Are Customers Charged For Travel Time?
    As professional plumbers can charge for travel time, it’s wise to hire a good plumber that is as local to you as possible.
    Are There Service Fees, Too?
    Plumbers can charge a fee just for a visit, so be aware of this in advance, and how much they are likely to charge.
    Is There Any Charge For Parts?
    Though a professional plumber should reach you with the right parts for the job there is always the chance of an unexpected problem being detected. As a result, different parts may be required. So, find out whether the purchasing of new parts will have an impact on how much you are charged overall.