I live in AZ and have underground PVC pipes from the well to the house. I've had 6 leaks in the past two months. The first leak was at a joint connected with electrical conduit. Others occurred where the person reused the PVC pipe. Now I've noticed that the pipes aren't straight. The most recent leak was at a straight connection but the pipes met at an angle. The coupler between these pipes cracked in the middle. I suspect this happened because the two pipes weren't straight and the pressure forced the coupler to crack and then leak. Do PVC pipes need to be completely straight and aligned for them to seal properly? The person making the repairs says no.