I'm not sure if I have a pvc leak somewhere, or a well problem. The symptoms are loss of pressure, heads that will pop up and down, then spray, then lose pressure and pop up and down again...
This happens in 3 of the 6 zones. The other 3 zones run great.
In 2 of the zones we can hear a loud 'knocking' or 'surging' of water / air when the pressure drops... You can even feel it "thumping" in certain parts of the yard... we tried doing some random digging where we heard the knocking and felt the 'thump thump thump' as the surge was happening - found the pvc - but after about 6 feet in length of digging 1.5 feet down, (and finding no wet spots) we figured there HAS to be a better way than just digging up the yard.
First - does this even sound like a leak? Could a leak in one zone be affecting other zones? Why would the 'thumping' be louder when it gets to zone 3 - as opposed to zones 1 and 2 (no thumping, but definitely surging / changing pressure).
We haven't found any noticible 'wet spots' in the yard to indicate a leak - even when we dug in the spots that had the most thumping, the ground was dry..
Any ideas on how to easily find a leak? And again - does this even sound like a pvc leak?
Thanks for any help.