FAQ: Wet Area Around the Sprinkler

Q: Why is there a wet area around my sprinkler?

A: There are two reasons why there might be a wet spot around your sprinkler:

1. The most common reason is called “Low Head Drainage.” This is when the lowest head on the zone leaks the water from the piping out the sprinkler. Eventually, the water leak will stop after all the water has leaked out of the pipe. To fix low head drainage, install check valves on the sprinklers or in areas with extreme elevation change, you may need an HCV underneath the sprinklers exhibiting this issue.
2. Another reason may be water leaking through the valve. Note: a check valve in the sprinkler will not fix this leak. Typically, water will leak through a valve because debris is in the valve. To fix this, you’ll need to disassemble the valve, rinse all the parts with clean water, and re-assemble the valve. If you cannot locate your valve boxes or fix the valve, it is recommended you contact the contractor who installed the system or use our Professional Contractor Referral link to help find a contractor in your area.