New Pump Union connections- Pentair

Jump to latest Follow Reply
J

JasonMaurer

New member
Feb 4, 2025
4
Austin
Got a new Pentair Superflo 1 HP to completely replace an old Pentair Whisperflo.

Old connections where:
Screw in 1.5 inch male to 1.5 inch female inlet; and
1.5 inch male to 1.5 inch female outlet
See photos.
New pump is as pictured with 1.5 inch unions provided but don't know BEST way to connect or adapt.

The provided inlet union will work if I can get a new outer edge screw on that I can bond to the provided union.

The outlet side puzzles me.
1000016388.jpg1000016389.jpg

1000016391.jpg1000016392.jpg1000016393.jpg
 

Attachments

  • 1000016390.jpg
    1000016390.jpg
    781.8 KB · Views: 4
Last edited:
JasonMaurer said:
Got a new Pentair Superflo 1 HP to completely replace an old Pentair Whisperflo.

Old connections where:
Screw in 1.5 inch male to 1.5 inch female inlet; and
1.5 inch male to 1.5 inch female outlet
See photos.
New pump is as pictured with 1.5 inch unions provided but don't know BEST way to connect or adapt.

The provided inlet union will work if I can get a new outer edge screw on that I can bond to the provided union.

The outlet side puzzles me.
View attachment 627081View attachment 627082

View attachment 627084View attachment 627085View attachment 627086
Click to expand...
Where are the unions that came with the pump?
WhisperFlow pumps are all 2"FIP inlet and outlet that accept that 2" CPVC nipple in a 2" union in your hand.
The other half pump-union with the O ring is also 2."
You use 1.5" - 2" bushings to increase the pipe size from the 1.5" unions that came (or should have) with the pump.
 
1poolman1 said:
Where are the unions that came with the pump?
WhisperFlow pumps are all 2"FIP inlet and outlet that accept that 2" CPVC nipple in a 2" union in your hand.
The other half pump-union with the O ring is also 2."
You use 1.5" - 2" bushings to increase the pipe size from the 1.5" unions that came (or should have) with the pump.
Click to expand...
Here are the 2 unions provided. Not sure how they would work with any previous connections at all since the threaded ring connections on the inlet and outlet are on thw outer side. The new unions will connect to the pump inner side for the inlet and outlet but then won't connect on their plain pipe ends to the existing 2 threaded outter edge of the inlet and outlet rings.
Alternatively the union pipes arent threaded either and the new Pentair inner threads are now smaller than the older model pumps. They also decreased the space between the basket and outlet so the old locking ring is now too wide to connect to the new outlet outside threads.

For visability i attached 2 photos with old connections on left and new unions on right

Almost feels like a complete replumb or return. Thanks again for looking and commenting.
 

Attachments

  • 20250205_150335.jpg
    20250205_150335.jpg
    392.8 KB · Views: 6
  • 20250205_150219.jpg
    20250205_150219.jpg
    578.1 KB · Views: 6
JasonMaurer said:
Here are the 2 unions provided. Not sure how they would work with any previous connections at all since the threaded ring connections on the inlet and outlet are on thw outer side. The new unions will connect to the pump inner side for the inlet and outlet but then won't connect on their plain pipe ends to the existing 2 threaded outter edge of the inlet and outlet rings.
Alternatively the union pipes arent threaded either and the new Pentair inner threads are now smaller than the older model pumps. They also decreased the space between the basket and outlet so the old locking ring is now too wide to connect to the new outlet outside threads.

For visability i attached 2 photos with old connections on left and new unions on right

Almost feels like a complete replumb or return. Thanks again for looking and commenting.
Click to expand...
Any time you change pump types, some re-plumbing is necessary, even within the same brand.
You should be able to use a 2" coupler over the new unions to bring the pipe size to 2" then plumb from there. If you cut the threads off that CPVC nipple it will go into a 2"coupler.
 
  • Like
Reactions: JasonMaurer and JamesW
TFP is a registered 501(c)3 non-profit that is maintained by user donations.

The people who answer questions are volunteers.

If you find the site to be a good resource, please consider making a donation to help support the site.

Thanks.

www.troublefreepool.com

Become a TFP Supporter

Help Support TFP Trouble Free Pool is run by a dedicated group of volunteers that … Read more…
www.troublefreepool.com www.troublefreepool.com
 
JamesW said:
You will have to redo some of the effluent side (from the pump to the filter).

Can you show the whole system?
Click to expand...
Here is the effluent outbound side from the pump. 2 images. The union provided next to the existing and a larger photo of how it previously went to the filter.
 

Attachments

  • 20250207_093447.jpg
    20250207_093447.jpg
    706.6 KB · Views: 6
  • 20250205_150335.jpg
    20250205_150335.jpg
    410.6 KB · Views: 6

Enjoying this content?

Support TFP with a donation.

Give Support
You must log in or register to reply here.
Thread Status
Hello , This thread has been inactive for over 60 days. New postings here are unlikely to be seen or responded to by other members. For better visibility, consider Starting A New Thread.
Top Bottom
Back
Jump to latest Follow Reply