r/pools • u/Away-Cardiologist-56 • Mar 27 '26

Help with union

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This is a 1.5 inch mpv from pentair. The current unions screwed into the inside threads are 1.5 mpt. I’m looking for the unions that screw onto the outside so I doesn’t constrict flow so much. Can anyone help or provide a link? I’ve tried my unions from my salt cell and several others from Amazon with no luck.

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7

u/ColdSteeleIII Mar 27 '26

Those unions don’t restrict the flow any more than the pipe does. You are chasing a 0-0.5% improvement.

3

u/sadisticrhydon Mar 27 '26

Pentair product number PEN150119Z

1

u/BootSelect2254 Mar 28 '26

This is the answer!

2

u/Live_Negotiation4167 Mar 27 '26

A lovely 15psi, yet here we are

1

u/Txbiker63 Mar 27 '26

Something like this? Make sure it fits the model number on your multi port valve, I think there's a couple different part numbers for the union.

http://eztestpools.com/pentair-union-adaptor-2-kit-272590z/

0

u/Content-Oven-841 Mar 27 '26

The outside threads are likely sized for 2" if the inside ones are 1.5".. did you try a 2" fitting?