SPRINKLER TALK FORUM - You Got Questions, We've Got Answers

I have had a number of bursts in underground in the poly pipe around T-fittings the last several years. I have had my sprinkers commercially blown-out well before the first freeze, but every summer, after the system has run a few months, I get a sink holes and water bubbles in the lawn. And its always the same problem: the poly pipe has a split running from just under the metal collar straight along the T- fitting. The builder claims the air pressure from having the system blown is to blame--but my neighbors have used the same outfit w/o problem. (The builder put in all front sprinker systems in the subdivision. Any thoughts?

The pipe is failing. The clamp rings or collars are intact (they are not the screw-adjust type-just single position). When you say torched--do you mean the poly pipe is heated in order to make it easier to insert the plastic fitting into the poly pipe?