Sta-Rite 35505-1428 o-ring, 2-1/8 inch inside diameterSta-Rite O-Ring 2-1/8" ID, 35505-1428 In stock$1699
Sta-Rite 35505-1428 o-ring, 2-1/8 inch inside diameter
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Sta-Rite O-Ring 2-1/8" ID, 35505-1428

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$1699
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Quick overview

  • Sta-Rite 35505-1428 Order by part number so the size is right the first time.
  • 2-1/8 inch inside diameter Measured across the inside of the ring.
  • 1/8 inch cross section The thickness of the ring itself.
  • System 3 filters Listed for the Sta-Rite System 3 cartridge filter models S7M120, S7M400, S8M150 and S8M500.
  • Cheap part, expensive leak A hardened o-ring is the usual reason a fitting weeps.
  • Change it at teardown Any filter opened for a cartridge clean is a filter with its seals already exposed.
Full description and specifications ↓

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Product details

Sta-Rite 35505-1428 is a replacement o-ring measuring 2-1/8 inches inside diameter with a 1/8 inch cross section. It is listed under Sta-Rite System 3 cartridge filter parts, covering models S7M120, S7M400, S8M150 and S8M500, and is identified in the listing as the large elbow o-ring.

Size is the whole story

An o-ring that is close but not correct will seem to seal on assembly and weep under pressure. Check both numbers against the ring you are replacing: 2-1/8 inches across the inside, 1/8 inch thick.

While the filter is open

Seals harden, flatten and take a permanent set from years of compression. They are the cheapest part in a filter and the most common source of a drip. Any time the filter is apart for a cartridge clean, the o-rings are worth a look.

Specifications
Brand Sta-Rite
Manufacturer part number 35505-1428
UPC 788379781590
Type O-ring
Part type Pool Filter Part
Inside diameter 2-1/8"
Cross section 1/8"
Fits Sta-Rite System 3 cartridge filters, models S7M120, S7M400, S8M150, S8M500
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.

What size is this o-ring?
2-1/8 inch inside diameter with a 1/8 inch cross section.
Which filters does it fit?
It is listed under Sta-Rite System 3 cartridge filter parts, covering models S7M120, S7M400, S8M150 and S8M500.
Where does it sit on the filter?
The listing identifies it as the large elbow o-ring on the System 3. Compare it against the seal you are replacing before fitting.
How often should an o-ring be replaced?
Whenever it is flattened, cracked or hard, and as a matter of course on any joint that has started to weep. Seals are the cheapest part of a filter and the most common cause of a leak.
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