6 — More than 200,000 Postal Service letter carriers will receive 1.3% annual pay raises and semiannual cost-of-living adjustments (COLAs), ...

seated gate valves including accessories, linings, coatings, valve boxes ... RD7L, Febco Model 826YD, or District approved equal. I. Where required by ...

201666 — Water hammer arrestors are devices that absorb the pressure wave, or water hammer, that occurs when a quick closing valve shuts and rapidly stops the flow of ...

202131 — Thermostatic mixing valves are useful in applications that must ensure a constant outlet temperature to prevent damage or injury.

Drain ports are sized for full port backflow discharge and are designed for a one way operation allowing backflow discharge but not allowing wind, debris ...

2009527 — Backflow prevention manufacturer Ames Fire ... Download the FREE Water Conservation, Quality & Safety eBook: Emerging Trends Addressing the Global.

A dual check backflow preventer is similar to a double check valve in operation. It has two independent spring-loaded check valves. However, dual check valves usually do not include shutoff valves, may or may not be equipped with test cocks or ports, and is generally less reliable than a double check valve.[4]

These systems are required for commercial properties and businesses may have more than one backflow valve. What is backflow? Water that comes into a building ...

The double check valve assembly is suitable for prevention of back pressure and back siphonage, but is not suitable for high hazard applications. It is commonly used on lawn irrigation, fire sprinkler[2] and combi-boiler systems.[3] If the hazard is higher, even a relatively low hazard such as using antifreeze in the fire sprinkler system, then a more reliable check valve such as a reduced pressure zone device may be mandated.

WATTS® Under Sink Guardian® Thermostatic Mixing Valve, Series: USG, 3/8 in Nominal, Compression, 150 psi, 80 to 120 deg F, 0.25 gpm Flow, Media: Hot/Cold ...

A double check valve or double check assembly (DCA) is a backflow prevention device designed to protect water supplies from contamination.[1] It is different from the two-way check valves (sometimes erroneously referred to as double check valves) used in air brake systems on heavy trucks which select from the highest pressure source.

Sep 30, 2002 — Pre-engineered valve stations are custom configured water flow control systems with proven, reliable components to meet project application ...

It consists of two check valves assembled in series.[2] This employs two operating principles: firstly one check valve will still act, even if the other is jammed wide open. Secondly the closure of one valve reduces the pressure differential across the other, allowing a more reliable seal and avoiding even minor leakage.

The LFMMVM1 Thermostatic Mixing Valves maintain and limit mixed hot water to a desired, selectable temperature. The LFMMVM1 valves can be set to any ...

Small valves may be so compact as to be barely noticeable particularly when they are integrated into the bodies of existing taps (faucets). Larger check valves may be installed with ball valves at the ends, for isolation and testing. Often, test cocks (very small ball valves) are in place to attach test equipment for evaluating whether the double check assembly is still functional.