Sta-Rite U9-373 o-ring for pump seal plateSta-Rite O-Ring for Seal Plate$1699
Sta-Rite U9-373 o-ring for pump seal plate

Sta-Rite O-Ring for Seal Plate

Ask a questionAPS # 96287
Out of stock
$1699

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Quick overview

  • Seal plate o-ring The seal that sits at the seal plate, part number U9-373.
  • Genuine Sta-Rite The factory part rather than a ring sized off the old one with calipers.
  • Replace when you open the pump An o-ring that has taken a set will not seal again once it has been disturbed.
  • Common cause of a leak Water tracking out at the seal plate joint usually means this ring, not the shaft seal.
  • Cheap next to the damage A leak here runs down onto the motor, which is a much more expensive failure.
  • Lubricate on assembly Use a pool rated silicone o-ring lubricant, never a petroleum grease.
Full description and specifications ↓

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Product details

The Sta-Rite U9-373 is the o-ring for the seal plate on Sta-Rite pool pumps. It is a small static seal doing an important job: keeping pumped water inside the pump instead of letting it track out at the seal plate joint and run down onto the motor.

Replace it when the pump comes apart

O-rings take a set in service. Once one has been compressed for a few seasons and is then disturbed, it rarely seals as well going back together, which is why this is a standard replacement item on any pump strip down. Lubricate the new ring with a pool rated silicone o-ring lubricant, not a petroleum grease.

Check the number for your pump

Seal plate o-rings differ between Sta-Rite pump families and the wrong size is a leak you will chase twice. Match U9-373 against the parts breakdown for your exact pump model before you order.

Specifications
Brand Sta-Rite
Manufacturer part number U9-373
UPC 788379850975
Type O-ring
Location Seal plate
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.

Which o-ring is this?
The seal plate o-ring, Sta-Rite part number U9-373.
Will it fit my Sta-Rite pump?
Check U9-373 against the parts breakdown for your exact pump model before ordering. The same seal plate o-ring number is called out on more than one Sta-Rite pump family, and neighboring models use different sizes.
Is this the shaft seal?
No. The shaft seal is a separate part. This is the static o-ring at the seal plate joint.
Do I need o-ring lubricant?
Use a pool rated silicone lubricant on assembly. Petroleum grease swells the rubber and ruins the seal.
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