|Sprinkler spray head internal components
Pop-Up Sprinkler Head Check Valves
Pop-up sprinkler head check valves are designed for use on slopes or hills, where water at rest collects at the lowest point in the irrigation system’s pipes. Depending on how extreme the elevation is, “low head drainage” may create enough pressure to force water out of the sprinkler and drain the piping.
Check valves automatically open and close to allow water to only flow in one direction. The valve components are built into the sprinkler, eliminating the need to install a separate check valve under each sprinkler. The latest version of the test protocol is designed to measure how well check valves operate, including an endurance test of long-term reliability.
SWAT Testing Protocol
SWAT began developing a testing protocol for sprinkler check valves in May 2012. Version 2.3 of the protocol was released in June 2014.
For questions about SWAT or sprinkler check valves, contact the Irrigation Association (703.536.7080; email@example.com).
Version 2.2: Test Protocol
Sprinkler Head Check Valve Testing Protocol Version 2.2 — updated March 20, 2014
Responses to Public Comments to Version 2.2
Version 2.1: Test Protocol
Sprinkler Head Check Valve Testing Protocol Version 2.1 — updated Dec. 18, 2013
Version 2.0 Test Protocol
Sprinkler Head Check Valve Testing Protocol Version 2.0 — updated March 26, 2012
Public comments and responses — updated Dec. 18, 2013
Draft 1: Test Protocol
Sprinkler Head Check Valve Testing Protocol First Draft — updated May 7, 2012
Public comments received — updated Aug, 31, 2012
Response to comments — updated March 26, 2012