Can a Watts 909 be installed vertically?
Series 909/LF909 may be installed in a vertical or horizontal line and in an accessible location to facilitate testing and servicing. A discharge line should be piped from the air gap at the relief valve connection making sure there is adequate drainage.
Can a reduced pressure backflow preventer be installed vertically?
Below-grade installations can be convenient, but are limited to certain types of backflow preventers. Proper maintenance care and testing should be followed. Horizontal installations are the most common. Vertical installations are limited on the flow direction and exclude Reduced Pressure Principle Backflow Preventers.
Why is my backflow leaking?
The most common causes are small leaks are debris like dirt, sand, or small rocks causing a blockage inside the valve. Try not to damage the swing valve or the ball valve inside the backflow device or check valve.
How does reduced pressure backflow preventer work?
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.
What does the lf909 large backflow preventer do?
Series LF909 Large reduced pressure valve assembly backflow preventer is designed to prevent the reverse flow of liquids in a plumbing system due to backpressure or backsiphonage where there is a potential health hazard.
When to use series 909 large relief valve?
Series 909 Large prevents the reverse flow of liquids in a plumbing system due to backpressure or backsiphonage where there is a potential health hazard. An exclusive relief valve design provides substantially improved relief valve discharge performance during emergency conditions of combined backsiphonage and backpressure.
How big is a small diameter backflow preventer?
These small diameter backflow preventers are available in 3/4 to 2 in sizes. Series LF909 for small diameter assemblies has a compact modular design that facilitates easy maintenance for in-line repairs. It can be installed horizontal or vertical without the need of any special tools.
Why do we need a 909 Osy service line?
It is ideal for protection in continuous pressure piping applications and at cross-connections identified as health hazards and from other contaminants found at the service line entrance.