Pentair O-Ring, 5/16 Inch I.D. In stock$3⁹⁹

Pentair O-628-9 o-ring, 5/16 inch inside diameter

Pentair O-Ring, 5/16 Inch I.D.

Name: Pentair O-Ring, 5/16 Inch I.D.
Brand: Aladdin
SKU: SPG-601-1224
Price: 3.99 USD
Availability: InStock

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$3⁹⁹

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Quick overview

5/16 inch inside diameter The dimension that decides fit, measured across the inside of the ring.
3/32 inch cross section The thickness of the ring itself, the second number to match.
Many applications A small common size used in more than one place, not a single purpose part.
Carries a second part number Also listed as OEM part number 33455-1047, so either number points at this ring.
Known substitutes Cross referenced to O-628, 5057-28 and 90-423-5109.
Replace, do not reuse An o-ring takes a set once it has been compressed, and a reused ring is the usual cause of a leak that comes straight back.

Full description and specifications ↓

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Product details

This is a Pentair replacement o-ring measuring 5/16 inch inside diameter with a 3/32 inch cross section. It is a common small size used across a number of applications rather than dedicated to one assembly.

Matching by number

The listing carries more than one identifier. O-628-9 is the manufacturer part number, 33455-1047 is given as the OEM number, and it is cross referenced to O-628, 5057-28 and 90-423-5109. Any of those numbers on an old parts list points at this same ring, which is worth knowing when working from an older diagram.

Fitting it

Match the ring by measuring, not by appearance. Inside diameter and cross section together decide whether it seats. When you fit it, use a silicone based pool lubricant and never a petroleum grease, and replace the old ring rather than reusing it, since compressed rubber takes a set and leaks again within a season.

Specifications
Brand	Pentair
Manufacturer part number	O-628-9
UPC	601402264597
Type	O-ring
Inside diameter	5/16"
Cross section	3/32"
OEM part number	33455-1047
Substitute part numbers	33455-1047, O-628, 5057-28, 90-423-5109
Listed under	Sta-Rite Dyna-Wave pump model MPRA6B-143L parts
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?

Five sixteenths of an inch inside diameter with a 3/32 inch cross section.

Why are two part numbers listed?

The listing carries O-628-9 as the manufacturer part number and 33455-1047 as an OEM number, and both refer to this ring. It is also cross referenced to O-628, 5057-28 and 90-423-5109.

Where does it go?

It is described as fitting many applications rather than one. Match it by measuring the inside diameter and the cross section of the ring you are replacing.

Should I lubricate it?

A silicone based pool lubricant on an o-ring helps it seat without rolling or pinching. Do not use petroleum based grease, which attacks the rubber.

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