Armco Pool Filter Head O-ring for Hayward Star Clear II C800, C1100, and C1500 - HWC-800-F



Part # 4662-11A

By Armco

  5 Average  



Part # 4662-11A

Manufacturer Code HWC-800-F

Dimensions 9-1/2"" L x 9-1/2" W x 3/8" D

Alternate Part #'s C-800-F, C800F, CX800F, HAY0511780, HWC800F, O-366-0, O366, 90-423-1366, ALA-601-4606, ALDO-366-0, APCO2192

Product Description



?     Asked on 8/27/2018by Michael

This new o-ring in 3/8” diameter allows water to surge out briefly under the dome cap when the pump starts. No leaks when the pump settles to steady speed, eg, 3200 rpm. I’ve Hayward Star Clear II Model C-1100. The old stock o-ring didn’t have this problem under initial pressure Everything is clean and well secured. Why am I getting this surge leak? Do you sell another o-ring 9 1/2” ID but 1/2” diameter? Best regards, Michael

A  Answered on 8/27/2018 by InyoPools Product Specialist Lennox H.

Hi, Michael. Make sure that the o-ring is well lubricated. Unfortunately, we do not have an o-ring that is thicker.

?     Asked on 7/29/2018by Daniel Basel

Does the head o ring hwc-800-f fit c 1100

A  Answered on 7/31/2018 by InyoPools Product Specialist Lennox H.

Hi, Daniel. Yes, this Head O-ring - HWC-800-F will fit the C1100 model filter. 

?     Asked on 7/6/2018by Inyo Visitor

Will this fit the swim pro C100MARTL CARTRIDGE FILTER?

A  Answered on 7/7/2018 by InyoPools Product Specialist Lennox H.

Hi. I was unable to confirm using the model #. If you can email some pictures of the canister and the label I will be able to confirm or locate the replace. 

?     Asked on 11/16/2015by Inyo Visitor

I have a 25 year old Hayward c-1100 filter and the gasket at the top needs replacement. The inside diameter is 9 1/2 and the outside about 9 7/8. Is this the appropriate replacement gasket/o-ring for this? Thanks very much.

A  Answered on 11/16/2015 by InyoPools Product Specialist Charlie R.

Yes, this is the correct filter head o-ring for the Hayward C-100 filter.


Est. Repair Time

Less than 1 hr

Tools Needed


Our filter ring was old and worn out.

Written on 6/13/2021 by Guest

I took the lid off. Noticed the o ring was worn out. I searched google for everything. I finally found and they had the perfect match. I ordered it and within a week it was at our door.

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