this is very common in new homes. I would work with the builder first. That is the easiest way to correct the problem. They are in the buiness of building home and need good referrals I would try ... read more
John
I would do what Paul said but I would take an additonal step of capping the sprinkler heads where they are easy to get to with a half dozen of 1/2" PVC caps. Then you are increasing the pressure ... read more