Sta-Rite 35505-7438 System 3 DE filter o-ringSta-Rite 35505-7438 System 3 Elbow O-Ring In stock$1999
Sta-Rite 35505-7438 System 3 DE filter o-ring
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Sta-Rite 35505-7438 System 3 Elbow O-Ring

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$1999
In stock
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Quick overview

  • Genuine Sta-Rite Factory part number 35505-7438.
  • System 3 modular DE Listed for the System 3 SMD series filter, models S7D75 and S8D110.
  • Check the position before fitting The source lists this part as the elbow o-ring in one place and the tank o-ring in another, so match it to the parts diagram for your filter.
  • A cheap part that stops a leak A hardened or flattened o-ring is the usual cause of a weep at a filter joint.
  • Replace on reassembly Any time that joint comes apart, a fresh o-ring is the sensible way to put it back together.
  • Lubricate correctly Use a pool grade silicone lubricant on o-rings; petroleum grease swells and destroys them.
Full description and specifications ↓

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Product details

The Sta-Rite 35505-7438 is a replacement o-ring for the System 3 modular DE filter, covering models S7D75 and S8D110.

Which o-ring is it

The source data is not consistent about the position. The listing name calls it the System 3 elbow o-ring, while the product record for the same part number calls it a tank o-ring. The part number itself, 35505-7438, is the reliable detail, so check it against the parts diagram for your filter before ordering rather than going by the name alone.

When to replace it

O-rings harden, flatten and take a set with age and heat, and that is the usual reason a filter starts to weep at a joint. Any time that joint is opened, fitting a new o-ring is cheaper than going back a second time.

Fitting

Clean the groove and the mating face before the new ring goes in, and use a pool grade silicone lubricant. Petroleum based grease swells rubber and ruins an o-ring quickly.

Specifications
Brand Sta-Rite
Manufacturer part number 35505-7438
UPC 788379778316
Type O-ring
Part type Pool filter part
Fits Sta-Rite System 3 modular DE filter, models S7D75 and S8D110
Also listed as Tank o-ring
Shipping weight 0.05 lb
Ships Parcel

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Questions and answers

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

Is this the elbow o-ring or the tank o-ring?
The source describes it both ways: the listing name calls it the System 3 elbow o-ring and the product record calls it a tank o-ring. Check part number 35505-7438 against the parts diagram for your filter before you order.
Which filters does it fit?
It is listed for the Sta-Rite System 3 modular DE filter, models S7D75 and S8D110.
Is it a genuine Sta-Rite part?
Yes, it is the Sta-Rite part, number 35505-7438.
What should I put on it?
A pool grade silicone lubricant. Petroleum based grease makes o-rings swell and fail early.
Ask your own question