What is the difference between a regular backflow preventer and a reduced pressure backflow preventer?
What is the difference between a regular backflow preventer and a reduced pressure backflow preventer?
A Reduced Pressure Zone (RPZ) lets you know that the valve is working properly. RPZ backflow preventers consist of two independent check valves. Backflow preventers work by letting water flow through them in one direction, but prevent water from flowing back through them in a reverse direction.
Who certifies backflow preventer?
The California – Nevada Section of the American Water Works Association offers a Backflow Prevention Assembly Tester Certification.
What is a reduced pressure principle?
The reduced pressure principle back-flow prevention device (RP) uses check valves to prevent water from flowing backwards through the pipes. A check valve is a disc or flap that can be pushed open when water flows in the normal direction, allowing water to flow through the pipe.
Can a reduced pressure backflow preventer be installed vertically?
There are backflow preventers that can be installed horizontally, vertically (up or down) and other orientations that can make an installation easier. The key point to realize however is that they can only be installed in the orientation that the approval agency has determined they will work in.
Does backflow preventer go before or after pressure regulator?
The filter, used to protect the small water passages of the drip emitters and micro sprinklers, is installed after the backflow device. The pressure regulator (preset or adjustable), used to reduce the incoming pressure to the appropriate range for optimum performance, is installed after the filter.
What does ASSE certification mean?
ASSE International is an ANSI-accredited standards developer and product certification body composed of members representing all disciplines of the plumbing and mechanical industries.
What is a certified backflow tester?
A certified backflow assembly tester is a person who has successfully completed a 40-hour State of California approved backflow assembly tester course and has demonstrated their ability to field test these assemblies to the satisfaction of the approved certifying agency.
Why do I need a backflow preventer?
A backflow prevention device is used to protect potable water supplies from contamination or pollution due to backflow. In water supply systems, water is normally maintained at a significant pressure to enable water to flow from the tap, shower, or other fixture.
What is the purpose of a backflow preventer?
What is the Purpose of a Backflow Preventer. Water that comes from your faucets is kept safe by the use of a backflow preventer. The valve prevents contamination of drinking water and protects the pipes from allowing any foreign substances to enter the system.
What is the purpose of a back flow preventer?
Backflow Devices. A back-flow preventer helps keep contaminated water from re-entering your household water system, and should always be used when applying fertilizer. It prevents water from flowing backwards from your drip or soaker hose irrigation system into your household water.
When is a backflow preventer required?
Newton – Backflow preventers are required and must be installed, repaired, or replaced by a certified technician. Testing by a certified technician is required once a year, and an overhaul is required every five years.
