Watts LF00921/2

The Watts 009 RPZ backflow preventer is a proven performer in municipal water distribution systems nationwide. You can now provide RPZ backflow protection to water systems connected to hydrants that are being used for purposes other than fire fighting, i.e. filling tanker trucks whose contents may include hazardous chemicals. The Watts 009 RPZ is equipped with two ball valves and comes with a 2-1/2" NST(F) swivel connection and a 2-1/2" NST(M) hose connection. Weighs 33 lbs.

WattsBackflow Preventer

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Demand hot water recirculating systems can save water and energy in some situations. Potential benefits of installing a demand recirculating system during your next new construction or home retrofitting project, include:

If you plan to use a 2" discharge hose with NPSH or quick connect fittings, order the appropriate adapter fitting to replace the stock 2-1/2" NST(M) fitting that comes with the unit.

3"backflow preventer

watts21/2backflow preventer

The Watts 009 RPZ backflow preventer is a proven performer in municipal water distribution systems nationwide. You can now provide RPZ backflow protection to water systems connected to hydrants that are being used for purposes other than fire fighting, i.e. filling tanker trucks whose contents may include hazardous chemicals. The Watts 009 RPZ is equipped with two ball valves and comes with a 2-1/2" NST(F) swivel connection and a 2-1/2" NST(M) hose connection. Weighs 33 lbs.

If you plan to use a 2" discharge hose with NPSH or quick connect fittings, order the appropriate adapter fitting to replace the stock 2-1/2" NST(M) fitting that comes with the unit.

How it Works. In a conventional system with a central water heater, any cold water standing in the pipes between the heater and the point-of-use is dumped down the drain as hot water travels from the heater.

In an integrated loop system, hot water is re-circulated intermittently. Hot water is returned to the water heater through the cold water pipes. This process raises the temperature of the cold water slightly, but it returns to the usual cold temperature in a short time.

In a demand recirculating system, when the system is activated the pump starts recirculating cooled water that's been sitting in the hot water line and sends it back to the water heater through the cold water line. When the water reaches a desired temperature a control turns off the pump. This process is similar to turning on the hot water faucet and letting the water run until it gets hot, but instead of the water going down the drain, it is simply returned back to the water heater—saving energy and water.