Sta-Rite U109-93SS old style pump shaft sealSta-Rite Shaft Seal, Old Style, U109-93SS In stock$2699
Sta-Rite U109-93SS old style pump shaft seal
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Sta-Rite Shaft Seal, Old Style, U109-93SS

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$2699
In stock
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Quick overview

  • Old style seal The pre 1998 Sta-Rite shaft seal, not the later design.
  • Check the date first Sta-Rite changed the seal in 1998, so confirm the age of the pump before ordering.
  • Seals the wet end Keeps water in the volute and off the motor shaft and bearings.
  • The usual leak A drip at the seal plate almost always means the shaft seal rather than the housing.
  • Two piece seal Fitted as a matched rotating and stationary set, replaced together.
  • Sta-Rite pump part Listed as a Sta-Rite pool pump part.
Full description and specifications ↓

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Product details

The Sta-Rite U109-93SS is the old style shaft seal, the version used on pumps built prior to 1998.

What the seal does

The shaft seal is the barrier where the spinning motor shaft passes into the wet end of the pump. Two lapped faces, one turning with the shaft and one fixed in the seal plate, are held together so water cannot follow the shaft out of the volute. It is a wear part by design, and it is the single most common leak on any pool pump.

Old style versus new

Sta-Rite changed this seal in 1998. Confirm the age of your pump, or compare the old seal, before you order. Fit the seal as a complete set, both faces together, and take the chance to inspect the seal plate and shaft while the pump is apart.

Specifications
Brand Sta-Rite
Manufacturer part number U109-93SS
UPC 788379850333
Type Shaft seal
Style Old style, prior to 1998
Part type Pool pump part
Shipping weight 0.1 lb
Ships Parcel

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Questions and answers

What people ask about this product, answered by our pool techs.

What does old style mean?
It is the Sta-Rite shaft seal used on pumps built before 1998. Later pumps use a different seal, so the build date decides which one you need.
How do I know my shaft seal has failed?
Water dripping between the motor and the pump housing is the classic sign. Left alone it runs down into the motor and takes out the bearings.
Do I replace both halves?
Yes. A shaft seal is a matched pair of faces, and the two halves wear together. Fit the complete seal rather than reusing either half.
Is this a genuine Sta-Rite part?
It is listed as the Sta-Rite part, number U109-93SS.
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