I am building a new pool house and need to extend my black poly supply and return lines to a different location.There is an outside chance that it will be possible to replace the entire line during excavation, however I am not counting on it. If it becomes necessary to extend using fittings, the joint will be under a new concrete patio. I realize that I should avoid this but it may not be possible. What would be the best technique in terms of fittings/adhesives etc? Also, should I stay with black poly or transition to pvc?
Signature:16' x 36' In-ground. Vinyl Liner. 24,000 Gallons. Hayward 3/4 HP self priming pump. Hayward EC 75 Perflex filter.