The water outlet from my Sta-rite heater is leaking, the leak is not from the compression screw-on union but rather from the glue joint where the sleeve(the part that contains the O-ring) joins the PVC pipe. I need to cut the PVC pipe and re-glue a new union coupler, I could only obtain a Goldline SWG union coupler. The pool store guy said the screw-on collar may not have the same threads as the Sta-rite's, I plan on re-using the Sta-rite screw-on collar but with the Goldline sleeve. Does anyone think this arrangement will work?