Part # 5250-225
Manufacturer Code PS-3865
Dimensions 0.8" x 1.25"
Alternate Part #'s 319-3100B, PS-1000, PS-3865, PS-3865R, PS1000, PS3865, PS3865R, 35-423-1048, APCPS3865R, PSR-1000V
Heavy duty pump motor shaft seal made with carbon graphite, stainless steel and Viton rubber. These materials provide increased durability and resistance to chemicals and salt.
Commonly Used In
Can be used for standard chlorine pools. Strongly recommended for use on pool and spa pumps connected to salt chlorine systems or ozonators.
This seal can be used on a number different makes and models of pumps (see complete list under the "Parts" tab above). Some of the more common pumps include the Pentair Whisperflo, American Products Ultra Flo, Polaris PB460 booster pump, and Astral Astra Max.
Frequently Bought with this Shaft Seal
Clear RTV Silicone 6558-0 (For gluing shaft seal into the seal plate)
Shaft Seal, PS-1905, 5/8" Shaft, Silicon Carbide PS-1000 is available PART # PS-1905 Click here https://www.inyopools.com/Products/24201352088384.htm to view for ordering
Will this work as a replacement for part # 071734S on a Pentair whisperflo WF 26 1.5hp?
Hello Charles. The Pump Shaft Seal PS-1000, Heavy Duty (Saltwater Pools) - PS-3865 is a compatible replacement for the Pentair Whisperflo WF-26 part 0717345.
I’m running salt water and was wondering if this seal will fit my booster pump? Thank you!!
Hi Eric, Thanks for the photos! Yes this is the correct saltwater replacement shaft seal for your Pentair Booster Pump.
Hi. Would it be better to use the heavy duty seal instead of standard one in non-salty water pump?
Yes, if your swimming pool still uses chlorine for sanitation then it still would be worth it because there is still sodium in liquid chlorine and even chlorine tablets can create corrosion.
Hector, thank you very much for you feedback
I have two PB4-60 pumps, one older (Model MO?11110205 and a newer one (Model PB080317261) for my saltwater pool. Will this seal fit both models?
Hello, Yes, these seals will fit your booster pump.
Although my pump/motor is 12 years old, it seems that the shaft seal is leaking.
I could barely make out the name of pump, but it looks like it spells Whisper.
The P/N 01175
PMP WF - 30 230V 21/2 HP
Can you match this up with needed seals?
Why should I purchase the heavy duty seal?
The heavy duty shaft seal features carbon graphite, stainless steel, and Viton rubber. The properties of this seal contribute to the resistance of chemical corrosion. This is the best choice for salt chlorine generators or ozonators.
Less than 1 hr
After removing pump, followed directions on INYO pool video for pump replacement. I ordered the heavy duty seal since the previous pump/seal might have failed and that was the reason for the bearings going bad. Did water get in? I don't know, but thought for the few extra $$ a heavy duty seal would be a better choice. Got old seal out of Faceplate using socket the fit the diameter of the seal. Used a rubber hammer to remove. Installed new seal in the same manner. USE A RUBBER HAMMER TO PREVENT DAMAGE TO SEAL.
(4 out of 5 stars) Polaris Booster pump seal replacement
Reviewed By: Inyo Customer ()
I went with the heavy duty seals for the Polaris Booster pump rebuild because I plant to convert my pool back to salt. The seals went in easily after removing the old ones and polishing the shaft.