What is an RPDA?

Reduced Pressure. Principle Detector Assembly (RPDA) A RPDA is a specially designed assembly composed of a line- sized approved reduced pressure principle backflow assembly, with a specific by-pass water meter and a meter-sized approved reduced pressure principle backflow prevention assembly.

What is an RP valve?

What is an RPZ Valve Used For? Reduced pressure zone assemblies, also known as RPZ valves, are extremely important. They’re used to keep contamination or pollution out of your water. Specifically, these devices are installed onto your plumbing system to help protect both drinking water and the city water supply.

What is a DC preventer?

A DC is a testable mechanical backflow preventer that consists of two independently acting, spring-loaded check valves. It includes shutoff valves at each end of the assembly and is equipped with test cocks against back pressure backflow and back- siphonage, but should be used only on non-health hazards.

Does my pool need a backflow preventer?

Backflow preventers are an important component to your backyard sprinkling system. Without these, municipality drinking water would become contaminated.

Do I need a backflow preventer?

Understand that it is always recommended to install a backflow preventer in any situation where incoming water and waste water have a chance of being cross-connected. This serves to protect you and your home, keeping your drinking, bathing, and cleaning water safe.

What is the difference between a backflow preventer and a double check valve?

Check valves use a hinged plug that allows water to pass through the pipeline but blocks it from coming back. Backflow preventers, on the other hand, apply an increased amount of pressure on a pipe to ensure the water can only flow one way.

What is the difference between check valve and double check valve?

A single check valve can be used for fluid category 2 protection, where there may be an aesthetic change such as temperature, taste or odour. A double check valve is used for fluid category 3 protection, where there is a risk of substances of low toxicity such as common disinfectants.

How does backflow RP work?

They work like a double-check (DC) backflow preventer, but also have an intermediate relief valve that opens to the atmosphere if both check valves should fail. Backflow preventers work by letting water flow through them in one direction, but prevent water from flowing back through them in a reverse direction.

Why does backflow preventer leak?

Why is my backflow preventer leaking? A. The backflow preventer is designed to relieve pressure when the watering cycle stops or the system is turned off, so you will see water dripping from it at system shutdown.

Where should a pool check valve be installed?

A check valve can be installed just before the in-line chlorinator or just before an off-line chlorinator injection point, to keep high concentrations of chlorine from backing up into heaters, filters or other nearby pool equipment.