Name of this PVC pump fitting?

[ConstantChange]

I'm needing to replace the hose between my pump and my filter. I plan to replace the 1.5" flex line with a 1.5" sch 40 hard line. The pump accepts two types of fittings. The style on there now, which looks like half a union that screws on the threads on the outside of the pump fitting or a a threaded fitting that screws into the threads on the inside of the fitting. I'm familiar with the threaded fitting that screws into the inside, but what is this fitting called that uses the outside threads?

I'll probably use the same fitting for the inside threads on both ends with a union in the middle, but I'm still curious what this fitting is called.

Thanks.

 

[Candurin]

It’s called a union.

 

[ConstantChange]

Is it a special type of union specific to pool pumps? I disconnected the white union in the middle of the flex pipe and tried connecting it to the pump. It threads on, but it gets to the point I can no longer tighten it and the pipe still has what feels like 1/2" of play. The black union screws all the way down where the pipe is tight.

I even lubricated the white union to see if I could tighten it more, but it didn't change anything.

 

[trivetman]

It might be a non standard fitting that came with the pump

 

[JamesW]

Look up the parts list for the pump and the filter multiport to get the unions that go to each.

 

[JamesW]

These unions go to the multiport.

Pentair Union Kit 1-1/2" Valve - 150119 - INYOPools.com

Pentair Union Kit 1-1/2" Valve

www.inyopools.com

What is the pump model number?

 

[JamesW]

I think that the pump might be a Waterway Plastics Hi-Flo Above Ground Pool Pump.

Waterway Hi-Flo & Hi-Flo II Side Discharge Above Ground Pump Parts - INYOPools.com

Waterway Hi-Flo & Hi-Flo II Side Discharge Above Ground Pump - INYOpools.com has the largest selection of swimming pool and spa replacement parts with over 70,000 parts in stock. Order today and save!

www.inyopools.com

Inyo should be able to help you find the correct union if you give them the pump make and model.

It might be one of these parts, but I am not sure.

Waterway 1-1/2" Union (400-4061) - INYOPools.com

"1-1/2"" UNION" (400-4061) - Pool & Spa Parts

www.inyopools.com

Waterway Union Assy., 2"nut X 1.5"tail (400-9230) - INYOPools.com

400-9230 - UNION ASSY., 2"NUT X 1.5"TAIL (400-9230)

www.inyopools.com

Pump Unions - Waterway Parts - INYOPools.com

Pump Unions - Waterway - INYOpools.com has the largest selection of swimming pool and spa replacement parts with over 70,000 parts in stock. Order today and save!

www.inyopools.com

 

[mguzzy]

I'll probably use the same fitting for the inside threads on both ends with a union in the middle, but I'm still curious what this fitting is called.

Its called a pain in the butt that the pool industry uses proprietary unions.. ... here's another option if you can't find a compatible part.. you can try and clean out the old one:

They sell them at Lowes and Home Depot.

 

[David&Robin]

Its called a pain in the butt that the pool industry uses proprietary unions.. ... here's another option if you can't find a compatible part.. you can try and clean out the old one:

They sell them at Lowes and Home Depot.

@mguzzy You are my HERO!!! I'm facing a pad plumbing situation that looks like spaghetti both above and below ground. This tool will be an absolute life saver...

 

[CT-Steven]

This might fit as well...

Amazon.com: Hayward SP1500UNPAK2 1-1/2-Inch Socket ABS Quick Connect Union Pak Replacement for select Hayward Pumps/Filters and Chlorine Feeders, Set of 2: Garden & Outdoor

Amazon.com: Hayward SP1500UNPAK2 1-1/2-Inch Socket ABS Quick Connect Union Pak Replacement for select Hayward Pumps/Filters and Chlorine Feeders, Set of 2: Garden & Outdoor

www.amazon.com