There are Australian Standards in place to protect you and your property from potential damage that might occur. Extra precautions are taken by making every new build (or extension work at a home) install a pressure limiting valve. With a PLV, the water pressure is capped at 500kpa thus reducing the strain put on your plumbing system.

If after reading this blog, you are wondering whether you have a pressure limiting valve or are in need of getting our water pressure tested, then please don't delay - contact us here at Network Plumbing on 9023 3232 and we will send our technician who will be able to assess your plumbing and give you an upfront and on the spot price for the works needed to be carried out to ensure the safety of you and your family as well as extend the life of your range of appliances that use the supply of water.

The orange valve is used for a heat pump or solar hot water system. This is used when the hot water can reach a boiling point.

A hot water tempering valve is engineered in a manner to maintain a temperature which is suitable for the tank as well as for dispensing. This means that when the water is in the tank, it’s temperature is above 60-degree. This kills harmful bacteria and germs present inside the tank. However, when the tap is turned on, the water is mixed with cold water to maintain a temperature of 50-degree. This helps in avoiding accidents. This means that the tempering valve mixes water before it ever reaches you.

Waterpressure Reducing Valve

A thermostatic mixing valve is a valve that blends hot water with cold water to ensure constant, safe shower and bath outlet temperatures, preventing scalding.

However, a tempering valve or a mixing valve still keeps the water hot enough in the tank to eliminate bacterial growth but provides water at a temperature that reduces the risk of scalding and accidental burning of a child or human.

The above requirements are achieved with the help of a hot water tempering valve. However, in the laundry and kitchen, this requirement can be bypassed and water can be fetched directly from the gas or electric unit.

Pressure limiting valves do not last forever, so, even if you don't have any signs that your PLV maybe be on its way out, the next time you have a plumber at your home, ask them to test your PLV for you. It's better to be safe than sorry!

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Pressure reducing valveworking principle

Have you ever noticed an annoying banging or excessive noise at times when you turn your plumbing on and off? Water flow may have something to do with this! Hammering is the shock wave that occurs when the water service is shut off and the high amounts of water pressure has nowhere to go. This force continues resulting in the noise, the banging in the walls after the inlet has been closed.

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A water pressure limiting valve (or PLV) is a vital component that limits the flow and amount of water pressure travelling though your pipes and plumbing. The valve stays open to allow pressure through and if the pressure rises above the preset maximum, the valve shuts off the water.

If you notice any of the above on your property or any other signs of high-pressure water supply issues, it's always best to contact a professional licensed Sydney plumber to have a look at your plumbing and to make a diagnosis as well as provide a solution for you.

Older homes are exempt from this rule, however, taking extra precautions is recommended. Make sure you have your water pressure checked by a professional licensed plumber and have a pressure limiting valve installed.

Pressure reducing valveworking principle pdf

If you are ever in need, then Network Plumbing is here to help with emergency plumbers available 24 hours, 7 days a week, however, our best advice is to read on further to learn and understand the importance of pressure limiting valves and how reducing your pressure is beneficial in more ways then you know. There is an Australian standard for a reason!

Hot water systems are not made with a PLV but they do certainly benefit from the installation of one to the plumbing at your water meter assemblies. As you can imagine, too much pressure on your hot water system could cause damage to it (as well as many other appliances for that matter). As the high volume and strength of the water is on the search for somewhere to go, if it finds other appliances that are not cut out for a water supply above 500kpa, it may find a weakness and cause unnecessary damage. This is why the installation of PLVs are so important.

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On the other hand, if a tempering unit is being used, then hot water burns won’t happen too quickly with a temperature of 50-degrees. This is why you can benefit a lot with a hot water tempering valve that can control the temperature of dispensed water.

A tempering valve for the hot water unit is a temperature-controlled and activated valve for 3-way mixing. It is used to manage the temperature of the water by mixing hot water and cold water. This delivers lower temperature water for enhanced safety and decreased risk of scalding.

A water tempering valve is an element that checks water sensitivity by mixing hot and cold water, depending on the requirements and adjusted temperature on the value. The mechanism through which the hot water mixing valve works contains a sliding valve inside a tempering valve, which adjusts and changes the ratio of the cold and hot water accordingly. Typically, this valve mechanism controls the dispensed water temperature between +- 3%.

Installation of a pressure limiting valve that has a maximum threshold of 500kpa may take the strain off your pipework, reducing the shock wave and possibly ending the hammering. The search to stop the hammering may be to install a pressure limiting valve.

The green valve is commonly used for gas systems, such as tankless continuous flow models. However, if your gas system is new, then it may already have a pre-set 50-degree as adjusted in the factory during manufacturing. So, you may not require a tempering valve for this.

What is the purpose of a pressure reducing valvein water

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A blue tempering valve is the most common one. We utilize it in electric heaters to deliver temperatures between 65-75 degrees.

Pressure reducing valvediagram

For every installation, remember to consult a licensed plumber. Don’t try this installation yourself to avoid damage of any kind.

We also know what you're thinking, will a pressure limiting valve affect the pressure of your shower? Everyone loves a nice strong hot water shower, especially in winter, and your hot water system will still get great pressure even when capped at the 500kpa mark. So, don't stress! That hot water will still come through nice and strong for you.

The black valves are used for low-pressure gravity feed or large capacity systems. However, the lifespan of these systems is not fixed. Hence, you may want to replace this valve in every 5 years.

This is one plumbing job that should not be on the DIY project list! Only an experienced tradie should test, install or replace a pressure limiting valve.

A hot water tempering valve can be adjusted by 2-inlet mixing, through which water temperature is moderated by mixing cold water and hot water. Here, the tempering valve aims to achieve a temperature of 50-degrees. This decreased temperature is dispatched from the shower heads and taps. The temperature achieved by the tempering valve is set with the help of local building codes.

In reality, scalding causes serious injuries to children. These injuries are extremely painful and slow healing. Without a tempering valve, scalding can happen rather quickly, depending on the water temperature that you have set.

If you have a current hammering issue, contact our customer care phone number 9023 3232 to discuss your plumbing concern. Please note, this shock wave is not limited to only a water supply pipe, it can occur in a gas line service as well which means you'll need the services of an experienced Sydney gas fitter.

As the task is crucial and legally necessary, you need a licensed plumber Sydney to achieve this. Don’t try this task at home yourself.

There are various types of tempering valves. While the primary purpose is the same, the functioning is different. Let’s see a few types of tempering valves.

What is theuseof a pressure reducing valvehydraulic

There are some key signs to look out for that may be a warning that you are in need of a water pressure limiting valve or a replacement when your pressure limiting valve is leaking. These include (but are not limited to):

pressure reducing valve- bunnings

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When your plumber installs a tempering valve in your hot water system, he needs to necessarily set the minimum required tank temperature to 60-degree. However, he may set the tap water temperature or 45-50-degree depending on the needs of the household. These two adjustments by the licensed plumber help the tempering valve to function correctly.

While most of us appreciate a nice strong shower water pressure or being able to fill the sink up quickly, if water is running through your pipes at too high of a pressure, your plumbing will begin to suffer by putting strain on your plumbing system, fittings, and appliances.

The damage that could occur due to high water pressure could include water hammer, burst pipes, water leaks, leaking taps and a wide range of issues that create strains on your plumbing. It can also reduce the lifespan of appliances such as dishwashers.

According to the regulations for hot water system installation, it is now necessary to have tempering valves in the hot water unit to avoid scalding. Your plumber should make this installation or adjust a tempering valve in your system to avoid dispense of water that has a temperature higher than 50-degrees.

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When checking the hot water tempering valve, your plumber may first ensure that the tank temperature is 60-degree and then he may use the closest tap to check the dispensed water. But, in the closest tap, the flow of hot water should be minimum 4L/ min to correctly check the efficiency of the tempering valve. After this, the plumber may switch on the valve to set it to 50-degree temperature.

If you have tried to adjust your water pressure limiting valve and have a leaking PLV, it could be for due to improper seating of the valve or when the seal is broken. Leaks may occur if the valve operates at a pressure too near to its designated set point.

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This rule is an exception for tankless systems or continuous hot water systems. Since a continuous hot water unit doesn’t have a tank, the growth of bacteria is eliminated, which eliminates the need for a 60-degree temperature inside the tank. This is why these units come with a pre-set of 50-degree temperature, so you don’t require a hot water tempering valve in these systems.