Howdy everyone. Let me start with some pictures I took today of the mystery pipe: http://imgur.com/a/n6JGV
I'm pretty sure that's HDPE but figured I'd ask the experts here.
The back of my house has a hose bib with a PVC connection that goes underground. While underground, there is a T fitting somewhere, with one side going to another hose bib that pops up out of the ground which I have connected to irrigate some crops. The 3rd port of the underground T is connected to this black mystery pipe that was just haphazardly cut by the previous homeowner before moving out. This would be one of the downsides of buying a foreclosure :/
Anyway, my goal is to just cap this pipe off. Can anyone help me identify it and point me in the right direction for a permanent, rock solid cap connection? I had a PVC cap glued on there with a hose clamp for good measure but that popped off this week when I added a watering timer for the irrigation. The timer introduced some water hammer when it shuts off and I think that was too much for the hack job I had on there before.