Series 909 Bronze Reduced Pressure Zone Backflow Preventer. image of the Watts 909 reduced pressure backflow preventer 909QT. This reduced pressure ...

Two independently acting, spring loaded check valves.Usually does not have shutoff valves and may or may not be equipped with test cocks.Should only be used to isolate non-health hazards and is intended for single family homes with no or minor potential hazards or risks. This device is not testable.

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the automatic gas shut-off (AGS) switch, which opens if the heat exchanger outlet temperature goes above 140° F (60° C). the stack flue sensor (SFS), which ...

Double Check Valve Assembly diagram

Backflow prevention devices, if properly installed and maintained, allow water to flow in only one direction. Water can flow from the public water system to the customer's property, but not in the other direction.

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The install of an electric system is much simpler than a hydronic system. Typically, the install of an electric system is done by an electrician, tiler, builder or even the home owner themselves. The install process is simple, and the system is then tested by a qualified electrician prior to tiling.

2 Double Check ValveBackflowPreventer

Wilkins Irrigation Water Pressure Reducing Valve 1" 500A / ZURN Strainer. Condition is "Used". Shipped with USPS Priority Mail.

The type of device that is suitable for your property is based on the degree of hazard your property presents to the public water system. The most common types of backflow devices used are:

TMV3-approved 15mm and 22mm thermostatic mixing valves (TMVs) for healthcare buildings and schools to protect users by reducing the risk of scalding.

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Two independently acting check valves separated by a reduced pressure zone.Installed as a unit between two shut off valves.Each check valve is fitted with a test cock for periodic testing.Can be used for health hazards (i.e. toxic material) and severely hazardous connections (i.e. medical/dental facilities, industrial plants and agricultural operations).

Zone IsolationZone Isolation is having a backflow prevention device installed that protects the rest of a building from one particular area.

Two internally loaded check valves, force-loaded or internally weighted.If one check valve fails to close the other will prevent backflow.Each check valve is fitted with a test cock for periodic testing.Can be used for all non-health hazards (non-toxic) connections (i.e. fire sprinkler, irrigation systems).

Both electric and hydronic systems are going to provide you with the warmth, comfort and luxury that only Underfloor Heating can bring. It can be difficult to know exactly what system is best for your application so if you are still unsure please feel free to reach out to us on 1300 368 631 and one of our consultant’s will be happy to discuss your exact requirement’s.

An electric underfloor heating system has a lot faster heat up time. It takes approximately an hour for an Undertile system to heat up and cool down so this allows you to set the schedule to have the heating on exactly when you need it and be able to change it to suit sudden outside temperature changes.

A Hydronic Underfloor Heating system consists of a network of pipes running under the floor. Hot water heated by a boiler flows through the network of pipes to heat the substrate and therefore heat the room. Typically, in Australia most Hydronic systems are located in the slab not directly below the floor finish.

Both Hydronic and Electric Underfloor Heating systems can be controlled by a programable Thermostat. With an In-Slab system you have a lot less control as you will need to allow 1-2 days for the slab to heat up and then the same amount of time to cool down. This means you don’t have the ability to suddenly turn on the heating or turn off the heat with changes in the weather.

Dcva backflow deviceinstallation

Whether you have a hydronic or an electric system it is still recommended to add insulation below the heating to stop downward heat loss as heat moves equally in every direction until it meets a layer of thermal resistance.

DCVAvs DCDA

If you are required to install a backflow preventer, contact the City of Pitt Meadows for recommendations on which preventer to install.

If your property only has Fixture or Zone Isolation, and you fall into the severe or moderate hazard category, you will need to upgrade to Premise Isolation.

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Once an underfloor heating system is installed there is little chance of anything going wrong with either a hydronic or electric system. If, however there was an issue an electric system would be easier to locate than a hydronic system.

Underfloor Heating is rapidly becoming one of the most common methods of heating used in Australia. With the heating at the floor level, it is an efficient way to heat any room. There are two main forms of Underfloor Heating, Electric and Hydronic.

With an electric underfloor heating system, a technician can put high voltage down the cable to track where the damage is. This can normally be traced down to a single tile that needs to be lifted and the heating cable repaired.  However, with a hydronic system there is simply a leaking pipe causing the water to run along the outside of the pipes making it extremely difficult to pinpoint the exact location of the leak. As a result, it is more likely that a greater proportion of the floor will need to be lifted in order to locate and repair the leak.

A hydronic system is more complex to install and would require a plumber. Typically, you will need to engage a professional company for installing a hydronic system to ensure the install is carried out correctly to ensure you get an even spread of heat throughout the floor.

* Only the Reduced Pressure Backflow Assembly (RPBA) and the Double Check Valve Assembly (DCVA) will be accepted for Premise Isolation backflow devices.

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An Electric Underfloor Heating system consists of electric heating cables being installed beneath the floor. Electricity then passes along the resistive cables causing them to heat up and radiant the heat into the room. Whilst there are electric systems for in the slab, the majority of electric underfloor heating systems are installed above the slab either directly below the substrate or in a screed.

WattsBackflowPreventer

By adding a layer of insulation below the heating, you are providing an additional level of thermal resistance which means you are forcing the heat upwards into the room which turns into hot air and rises. Insulation will increase your heat up times and reduce your heat loss resulting in increased efficiency of the underfloor heating system.

The specific type of premise isolation backflow preventer (i.e., RPBA or DCVA) will depend on the hazard associated with the property use. Contact the City of Pitt Meadows for the requirement on which preventer to install.

RPZBackflowPreventer

Already have Premise Isolation?If your property already has Premise Isolation installed, you are required to test existing backflow prevention devices on an annual basis.

Whilst both the hydronic and electric system can be used in most applications there are some additional points to consider:

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Premise IsolationPremise Isolation is having a backflow prevention device installed at the point where the water service enters a property. This provides the proper level of protection from the property, reduces the potential of bypass connections and provides consistency.

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As a result, it will take approximately two days to heat the entire slab and turn this into a heat bank and generate heat in the room. Once the slab is warm it holds the heat well and becomes an energy efficient heat bank. However, in Australian most areas experience cold mornings and evenings but have it warm during the day, so this is not an effective or useable form of heat as you are unable to reduce or turn off the heat during the day.

Fixture IsolationFixture Isolation is having a backflow prevention device installed at the source of the potential contamination. This provides protection for only a section of the piping system.