Pentair O-628-9 o-ring, 5/16 inch inside diameterPentair O-Ring, 5/16 Inch I.D., O-628-9 In stock$399
Pentair O-628-9 o-ring, 5/16 inch inside diameter
Shop all Aladdin

Pentair O-Ring, 5/16 Inch I.D., O-628-9

Ask a questionMPN O-628-9
$399
In stock
Get volume pricing Request a quote

30 day returns · Easy, with prepaid labels provided

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 ↓

Need a hand?

Bilingual support from pool professionals.
(888) 751-8084CallChat with a techChatEmail usEmail

Send us a message

A pool professional will get back to you, usually the same business day.

About Pentair O-Ring, 5/16 Inch I.D., O-628-9, SKU SPG-601-1224. We will include it with your message.

We use your details to answer this message and nothing else.

Frequently bought together

Current item Pentair O-Ring, 5/16 Inch I.D., O-628-9
Aladdin

Pentair O-Ring, 5/16 Inch I.D., O-628-9

$399
Sta-Rite 170145 System 3 S7M120 Large and Small Cartridge Set, 25021-0200S and 25022-0201S
Pentair

Sta-Rite 170145 System 3 S7M120 Large and Small Cartridge Set, 25021-0200S and 25022-0201S

$46499
Pentair 6-Position Top Mount Clamp Valve Top Assembly, 272568Z
Pentair

6-Position Top Mount Clamp Valve Top Assembly, 272568Z

$15199
SuperPro Valve Seat Gasket 5 Spoke (5-5/16"), O-176A-9
Aladdin

SuperPro Valve Seat Gasket 5 Spoke (5-5/16"), O-176A-9

$799
Filbur Sta-Rite S7D75 Full Filter Grid Set (11 Grids), FS-3037
Unicel Filter Cartridges

Filbur Sta-Rite S7D75 Full Filter Grid Set (11 Grids), FS-3037

$24599
SuperPro Tank O-Ring (Generic) for Select Hayward® Filters, O-429-9
Aladdin

SuperPro Tank O-Ring (Generic) for Select Hayward® Filters, O-429-9

$1499
Pentair Genuine OEM Valve Body O-Ring for Cristal-Flo II and Sand Dollar Filters, 272541
Pentair

Genuine OEM Valve Body O-Ring for Cristal-Flo II and Sand Dollar Filters, 272541

$1199
Subtotal

Similar products

Other products people compare with this one.

Pentair 192115 genuine OEM drain plug o-ring, 1/16 by 1/2 inch Pentair Genuine OEM O-Ring for Drain Plug, 192115$399 Pentair 273513 rubber air bleeder screw o-ring for pool filters Pentair O-Ring for Air Bleeder, 273513$399 SuperPro O-263 generic o-ring, 6-3/4 inch inside diameter SuperPro Generic O-Ring, 6-3/4 Inch, O-263$499 Pentair 154005 spacer o-ring for Triton C-3 side mount sand filters Pentair Genuine OEM Spacer O-Ring (2 Required), 154005$499 SuperPro O-330-9 O-ring, 5-7/8 inch inside diameter by 3/16 inch thick SuperPro O-Ring, 5-7/8 Inch, O-330-9$499 SuperPro Diffuser O-Ring for Pentair Pump 355331 | O-421-9 SuperPro Diffuser O-Ring for Pentair Pump 355331 | O-421-9$399 Pentair Whisperflow Inteliflo Diffuser O-Ring 071444 P24262 | O-359-9 Pentair Whisperflow Inteliflo Diffuser O-Ring 071444 P24262 | O-359-9$499 Hayward DEX2400Z5 outlet elbow o-ring, 2-3/16 in. inside diameter Hayward Outlet Elbow O-Ring, 2-3/16" ID, DEX2400Z5$399 Jandy R0442500 outlet tube o-ring for DEL48 and DEL60 DE filters Jandy Outlet Tube O-Ring, R0442500$399 Hayward SX200Z4 valve O-ring, 2-1/4 in. inside diameter Hayward O-Ring, Valve 2-1/4", SX200Z4$399
Hayward DEX360M bulkhead o-ring for SwimClear cartridge filters Hayward Bulkhead O-Ring for SwimClear Cartridge Filters, DEX360M$399 Hayward O-Ring for Perflex DE Filter | ECX9611246 Hayward O-Ring for Perflex DE Filter | ECX9611246$342 Hayward CX900H Star Clear Plus locking knob o-ring Hayward StarClear Plus Knob O-Ring, CX900H$399 Hayward CX250Z7 locking knob o-ring for Star Clear cartridge filter dome lids Hayward Star Clear Locking Knob O-Ring, CX250Z7$399 SuperPro O-231-9 o-ring, 5-1/8 inch inside diameter SuperPro O-Ring O-231-9$399 Aladdin O-411-9 replacement o-ring, 5-1/4 in. inside diameter Aladdin O-Ring, 5-1/4" ID, O-411-9$399 Aladdin O-43 generic replacement 2 inch O-ring Aladdin Generic Replacement 2" O-Ring$399 SuperPro O-130-9 valve cap shaft o-ring SuperPro Valve Cap Shaft O-Ring, O-130-9$399 Waterway 805-0145 o-ring for 2 inch tail piece Waterway 2" Tail Piece O-Ring, 805-0145$399 Waterway 805-0136 air relief o-ring for Clearwater II cartridge filters Waterway Clearwater II Air Relief O-Ring, 805-0136$399

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

Request a quote

Need a volume price, a freight quote, or pricing in writing before you order? We reply the same business day.

Request a quote

Customer reviews

More from Aladdin

Aladdin Magic Lube 630 PTFE o-ring lubricant, 1 oz. tube Aladdin Magic Lube 1 oz. O-Ring Lubricant$699 Aladdin GO-KIT32-9 seal and gasket kit for Pentair WhisperFlo and IntelliFlo pumps Aladdin Seal & Gasket Kit for Pentair WhisperFlo & IntelliFlo Pool Pumps, GO-KIT32-9$3499 Aladdin GO-KIT 71 seal kit for the old style Polaris PB4-60 booster pump Aladdin GO-KIT 71 Seal Kit for Polaris PB4-60 Booster Pump$1699 Aladdin Magic Lube 631 PTFE o-ring lubricant, 5 oz. tube Aladdin Magic Lube 5 oz. O-Ring Lubricant$1499 SuperPro O-176A-9 five spoke valve seat gasket, 5-5/16 in., for Hayward Vari-Flo valves SuperPro Valve Seat Gasket 5 Spoke (5-5/16"), O-176A-9$799 Aladdin Equipment Co. GO-KIT3-9 rebuild kit for the Hayward Super Pump: housing gasket, diffuser gasket, lid gasket and shaft seal Aladdin Equipment Co. Super Pump Rebuild Kit, GO-KIT3-9$1999 SuperPro GO-KIT2-9 rebuild kit for Hayward Super II pump: seals and gaskets SuperPro Super II Pump Rebuild Kit GO-KIT2-9$4499 SuperPro O-429-9 generic tank o-ring for Hayward filters, replaces DEX2400K SuperPro Tank O-Ring (Generic) for Select Hayward® Filters, O-429-9$1499 Aladdin GO-KIT5-9 pump rebuild kit for Pentair PacFab Challenger pumps, shaft seal and o-rings Aladdin Go-Kit 5 Pump Rebuild Kit for Pentair PacFab Challenger Pumps, GO-KIT5-9$2499 SuperPro GO-KIT70 2 in. valve rebuild kit for Pentair PacFab multiport valves SuperPro 2 in. Valve Rebuild Kit, GO-KIT70$1999
SuperPro B-37 generic replacement skimmer basket for the S-10 Admiral skimmer SuperPro S-10 Admiral Skimmer Basket (Generic)$1999 SuperPro 271148 diverter spider gasket for 2 in. Pentair PacFab multiport valve SuperPro Generic 2" Diverter Gasket, G-417-9$1299 Aladdin APCKIT39 SP715 multiport valve repair kit, 2 inch, with spring Aladdin SP715 Multiport Valve Repair Kit 2" with Spring, APCKIT39$4699 Aladdin O-411-9 replacement o-ring, 5-1/4 in. inside diameter Aladdin O-Ring, 5-1/4" ID, O-411-9$399 Super-Pro GO-KIT3V-9 Viton gasket and o-ring seal kit for the Hayward Super Pump SuperPro Super Pump Seal Kit with Viton Seals, GO-KIT3V-9$3799 SuperPro O-497-9 generic tank o-ring, 20-7/8 inch ID by 7/16 inch thick SuperPro Generic Tank O-Ring 20-7/8" ID (7/16" Thick), O-497-9$2199 Aladdin Magic Lube II 5 oz tube of silicone lubricant and sealer, part 651 Aladdin Magic Lube II 5 oz$2299 SuperPro GO-KIT14-9 seal kit for Jacuzzi Magnum pumps SuperPro Jacuzzi Magnum Pump Seal Kit, GO-KIT14-9$2999 SuperPro O-184-9 18 inch tank o-ring for Pentair PacFab Nautilus DE filters SuperPro 18" Tank O-Ring, O-184-9$1499 SuperPro GO-KIT6-9 rebuild kit for Sta-Rite Max-E-Glas and Dura-Glas pumps SuperPro Max-E-Glas/Dura-Glas Pump Rebuild Kit, GO-KIT6-9$2299

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.
Ask your own question