By Armco



Part # 4600-2127

Manufacturer Code PF15-2127

Dimensions 18" X 7/16"

Alternate Part #'s 152127, O184, PAC0512801, PF152127, 90-423-1184, ALDO-184-0, APCO2040, SPG-601-1118

Product Description

Tank O-ring 18" - PF15-2127 

18" Nautilus® Tank O-Ring *AFTER 2001*


O-ring, 18" Tank (pf15-2127) This is the generic O-ring to the original part number 152127. If you want the original manufacturer, please order the Nautilus Stainless Filter Tank O-Ring Original - 152127


?     Asked on 3/15/2015by Robert Thomas

Oops--wrong model no. on previous o-ring question. Pac-Fab Nautilus NSS-48 is correct model number. Sorry.

A  Answered on 3/16/2015 by InyoPools Product Specialist Robert M.

Hello Robert - This o-ring will fit the Pac-Fab Nautilus NS-48. We could not find a a filter model NSS-48.

?     Asked on 4/8/2015by joe

Is this o-ring a wedge type ? My original is wider on one side and more narrow in the other....does that make sense??

A  Answered on 4/9/2015 by InyoPools Product Specialist Robert M.

Hello Joe - This o-ring has a round cross section. This replacement o-ring will work on the stainless steel Pac Fab Nautilus D.E., Sea Horse Cartridge, and 18" PF Sand Filter.

?     Asked on 5/25/2015by Steve

will this work on PF-50

A  Answered on 5/25/2015 by InyoPools Product Specialist Lennox H.

Steve, For PF-50 Sand filter you'll need the 22" Tank O-Ring (PF15-2038-1).

?     Asked on 6/24/2015by jim

will this work on NS-36 18" tank

A  Answered on 6/24/2015 by InyoPools Product Specialist Hector F.

Yes this o-ring will work on the NS36 filter.

?     Asked on 4/17/2016by Dennis

Will this fit ns 24

A  Answered on 4/18/2016 by InyoPools Product Specialist Lennox H.

Hi Dennis, This 18" Tank O-ring will fit the NS24 filter.


Est. Repair Time

Less than 1 hr

Tools Needed

Socket Set

Filter tank was leaking at the band.

Written on 12/10/2017 by Guest

First I drained about half of the water from the tank. There is no need to drain it completely if you are only replacing the tank O-ring. I removed the band and carefully separated the two halves of the filter housing with a putty knife. If more water comes out at the seam just drain a little more until you can lift off the upper half of the tank. My old O-ring was hard and shaped like a wedge which was the reason it was leaking. I coated the new O-ring all around with silicone pool sealant. Do not skip this step. Next, I carefully placed the O-ring on the lower half of the filter housing. It looked slightly over-sized, and kept slipping into the tank as I lowered the top half down on it. It would have been easier with a helper, so keep that in mind. I kept tucking and shifting it until it was in place, even though one spot bulged out slightly. The band went around it easily and actually corrected the bulging area. I tightened the band to leave a gap of 1/4" between the bolt keepers. I decided not to strain the band any more than was necessary for a good seal. The new O-ring is going to be thicker than the old one after years of compression, so do not expect the band to tighten down as tight as before. I primed and started my pump and it did not leak one drop! Thank you Inyo Pools for a high quality replacement O-ring.

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 (Average 4.56  out of 5 stars)
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