10 Dec 2019 — There are two different basic types of snowmelt systems: hydronic and electric. For the point of this article, the focus will specifically be on hydronics.

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Butterflyvalve

If you are a plumber you will be familiar with the vital role played by backflow prevention devices in protecting water supplies from contamination or pollution. Authorities in most States of Australia require that Backflow Test Kits be calibrated at least once per year. This is necessary because these testers are sensitive instruments and frequently become inaccurate if not treated carefully. Refer Australian Standard AS 3500.

3 Backflow preventer with intermediate atmospheric vent. Backflow preventers with intermediate atmospheric vents shall conform to ASSE 1012 or CSA B64.3.

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The most important thing to remember is to drain all water from your tester after you have used it. Water supplies in some States of Australia contain high percentages of dissolved minerals. If you do not drain your tester after use these minerals form deposits on moving parts which can eventually lead to the complete failure of your tester.

If your Backflow Test Kits requires calibration or servicing, give Calibration Management Services a call on 08 8381 1322 or via the web at www.calibrationmanagement.com.au

Globevalve

Horizontal lift check valves are used primarily for air, gas and steam services whilst swing check valves are most suitable for water and other liquids. For air, gas and low pressure applications, especially where bubble tight closure is required, a valve with rubber faced disc is necessary.

PVCCheck valve

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They feature a durable bronze body and a check valve and air opening port in one assembly. Maximum Working Pressure: 150psi (10.3 bar). 3/4" 765 Pressure Vacuum ...

Non returnvalve

The Backflow Tester has three hoses: the red high pressure hose, the blue low pressure hose and the yellow vent hose. The heart of the tester is the piston and cylinder which responds to the water pressure by means of a magnetic coupling that activates the indicator gauge. If mineral deposits build up on the walls of the cylinder of the tester, this will severely affect the instruments accuracy.

Synergy Twin-Alternating Metered Water Softener · Fleck 2900 2" Single Tank Commercial Metered Softener · Fleck 9100 3/4" Twin-Alternating Commercial Water ...

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Gatevalve

When selecting valves, reference to codes of practice and other mandatory specifications should be made which may preclude certain types for specific applications.

Check valvesymbol

Arrow Valves are a manufacturer and distributor of Fluid Category 4 RPZ Valves to conform to UK Water Regulations.

Yardworks™ Universal Gas Shut-Off Valve ... Ship To Store - Free! ... This universal gas shut-off valve helps to prevent unwanted fuel leaks and spills. The valve ...

Caleffi Prescal 535 pressure reducing valves are installed in residential water systems to reduce and stabilise inlet pressures from mains water supplies or ...

SwingCheck valve

Swing check valves, having 6 diameters of straight lengths of pipe upstream and 3 diameters downstream, are suitable for velocities up to 3 metres / second. If the valve is situated such that turbulent flow enters the valve, the velocity should not exceed 2 metres / second.

Check Valves are completely automatic in action, depending upon pressure and velocity of flow within the line to perform their functions of opening and closing. You can install most Crane FS swing check valves in horizontal or vertical upward flow piping. Lift check valves must be used in horizontal lines only.

WTT0864942 Repair Kit, For Use With Model LF25AUB/LF25AUB-Z3 Water Pressure Reducing Valve.

Double check valves are designed to prevent contamination of water caused by back syphonage, back flow and cross connection in supplies such as those to hose taps, cisterns, stand pipes, showers and basins.

Compressed air service requires a horizontal lift check valve with a nitrile rubber facing on the disc and fitted with a recoil spring. The valve should always be installed as far away from the compressor as possible.