Hello All - not sure where to post my question. I'm trying to aerate my pool, just raise PH. I'd like to input PVC pipe in my return thread. My problem is I can't twist off a unnecessary part as I think it is glued. I believe I have a 1.5" or 2.0" female thread that screws into a return. I will post a pic and hopefully the forum will steer me in the right direction where I can purchase. Thanks.