Determine correct pipe diameter?

[brew4eagle]

I need to order a new multiport valve and I'm not sure if I have 1.5" or 2" connections to the pool lines. I've learned in the past with household plumbing that it isn't always as easy as it sounds (e.g., inside vs outside diameter, different connection types) and in fact it's often the opposite of what seems obvious.

Anyways, here's some pics of my MPV with a ruler. Seems like 2" connections to the pool, is that correct? Or is it 1.5"? TIA!

 

[JamesW]

It is 1.5".

 

[HermanTX]

I need to order a new multiport valve and I'm not sure if I have 1.5" or 2" connections to the pool lines. I've learned in the past with household plumbing that it isn't always as easy as it sounds (e.g., inside vs outside diameter, different connection types) and in fact it's often the opposite of what seems obvious.

Anyways, here's some pics of my MPV with a ruler. Seems like 2" connections to the pool, is that correct? Or is it 1.5"? TIA!

You have to measure the pipe and not the fitting.
See the chart below. Measure the outside diameter of pipe. Focus on the dimensions of either 1.9 or 2.375
It looks like yours is 1.5inch pipe.

 

[JamesW]

Model SM10 AO is 1-1/2".

 

[JamesW]

SM-10-AO is 1.5".

SM-20-AO is 2".

Also, the pipe size is printed on all fittings.

 

[JamesW]

https://www.praherplastics.ca/wp-content/uploads/2022/04/Praher-2022-Pool-Catalogue-April-2022.pdf

Praher Universal Multiport Valve 1-1/2" FPT (Sand/D.E.) - SM-10-A0 - SM-10-AO - INYOPools.com

SM-10-AO-THREAD - VALVE,1 1/2" ALL PORT - PRAHER (SM-10-AO-THREAD)

www.inyopools.com

 

[brew4eagle]

Thank you, glad I asked!

 

[JamesW]

What is the filter model number?

You can use a 2" multiport and use reducer bushings.

What pump do you have?

 

[brew4eagle]

What is the filter model number?

You can use a 2" multiport and use reducer bushings.

What pump do you have?

iirc, it's a Pentair FNS 60

 

[JamesW]

Pentair Multiport DE Valve, 1-1/2" Threaded - 261177 - INYOPools.com

261177 - 1 1/2" MULTIPORT VALVE - DE W.G. (261177)

www.inyopools.com

Pentair Praher Multiport DE Filter Valve, 2" Threaded, SM20-2, SM2-PP2, 27507-200-000 - 261152 - INYOPools.com

261152 - 2 in. Multiport Valve Threaded for D.E

www.inyopools.com