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The last 2 posts

Friday, June 17th 2011, 9:53pm

by Mitchgo

My guess- The zone has a pipe break/broken fitting and what you think is working 'perfectly fine' but it's actually not

Friday, June 17th 2011, 9:20pm

by ObiJon Kenobi

Slow to start up sprinker heads

Here's an interesting one. I have pop-up, rotating rainbird sprinkler heads that seem to be behaving rather strangely. The system was installed 5 years ago and has not been modified. I only noticed this problem this year. When the zone comes on (electronically or manually) the water flows but the sprinkler heads behave as though the water pressure is too low. Within 2-5 minutes they magically pop up to full height and the pressure is perfectly fine for the rest of the cycle. If the zone is shut down then restarted the whole process can repeat very reproducibly. Rest of the zones work without difficulty.

Is this a valve issue (not opening completely?) Pressure problem? Thoughts?