I told builder I want 3" suction and return lines on spa and I also had them run 3" suction on pool drains. I have Pentair intelliflo 3hp vsp. He tells me I'm wasting my money. I have read on here of people complaining about low pressure on spa because of pipes too small. Builder says all I need is the 2.5" to spa. I know it's on here somewhere but can't find it tonight. To all the pros would you run 3" pipe to and from spa?
installing 8 jets 15 gpm each.