What does the anti-siphon valve do on a faucet?

What does the anti-siphon valve do on a faucet?

These anti-siphon devices are essentially one-way valves designed to stop the flow of potentially contaminated water back into the drinkable (potable) water supply. Anti-siphoning capabilities are required by code on certain plumbing devices, such as exterior faucets (sill-cocks) or utility sink faucets.

Is an anti-siphon valve necessary?

An anti-siphon valve is an essential irrigation part that should not be left off your supply list. If you want to keep your drinking water safe while providing yourself with peace of mind then an anti-siphon valve is just what you need.

Where should I install anti-siphon valve?

Quick & Dirty Summary

1. Anti-siphon valves must be installed 6″ higher than the highest sprinkler head or emitter outlet.
2. The anti-siphon valve inlet pipe must meet local plumbing code requirements for exposed pipe.
3. No other on/off valves may be installed on the downstream side of an anti-siphon valve.

What is the purpose of anti siphon valve?

Anti-siphon valves allow water to only flow in one direction. For irrigation purposes, it prevents water from the system from being siphoned back into the water supply line. Essentially, it stops unsafe water from entering a clean water supply such as the water that comes from your faucets or shower heads.

What is an anti siphon valve used for?

Antisiphon Valve. A valve installed in an aboveground tank system to prevent liquid from accidentally flowing out of the tank. An anti siphon valve is often needed where the liquid level in the tank is higher than the elevation of the dispenser or any of the product piping.

What is the purpose of a faucet check valve?

The purpose of any check valve is to allow water to flow in one direction and prevent flow in the opposite direction. In some cases check valves are needed on faucets to prevent hot or cold water from flowing through the faucet when there is demand on another part of the system.

Why do anti-siphon valves leak water?

Why Do Anti-Siphon Valves Leak Water? Valve Operation. Whether it’s installed on a hose bibb or a sprinkler valve, an anti-siphon valve’s operation is the same. Causes of Leaks. When an anti-siphon valve leaks, it could be because dirt has gotten into the valve and is preventing the poppet from seating completely when the water is Built-In Anti-Siphon Valve Repair. Screw-On Valves.