I had a service call today that had 2 leaks in 2 different parts of the lawn. I dug the 1st up it was a 1 1/2" X 1" bushing into the bell end of the 1 1/2" pipe. It appeared there had been primer and glue for sure on the fitting. But it had worked loose and started leaking. So I headed for the 2nd leak and it was the same thing. I have seen where the bell end was a tad bigger then normal pipe OD. It seems that the ID of the bell was bigger then the OD of the bushing. Meaning you take a bushing or a pipe and slide it in the bell it sometimes feels looser. The water is out of a lake? I thought this seemed a little strange. I think the system is about 5yrs old, from what the homeowner told me. The pressure is about 55psi.