Part # 4600-5008
Manufacturer Code O-420
Dimensions 19-1/8" ID, 3/8"
Alternate Part #'s 195008, O420, PAC0512964
Trapezoid Tank O-ring, Generic - O-420
Compatible with the following filter models:
Hi I just ordered an O ring for my DE filter. I need an o ring for FNS 36 which is what I typed in and now I am not sure what I ordered. Order Number: 979677
Please conform this is for a FNS 36 DE filter and if not please change to the correct part and ship to me.
If order is incorrect please stop order and correct !
Thank you Cell # 650-796-4814 South Carolina
Should the o-ring fit nicely around the filter or is there going to be extra o-ring hanging? Seems like it's too big. Thank you.
The DE filter is a Purex Triton Nautilus FNS 36. I do not see this filter being made any more, any ideas?
Hello, This filter is discontinued. They have a newer version available called the FNS plus.
The trapezoid O ring we are looking for should be around 30" (not the 19" you recommend). We have a SEA-HORSE filter Model #FSH300
After double checking catalogs per the manufacturer, this is indeed listed as the correct o-ring for that model filter. You can always touch base directly with Pentair who is the new owner of at 1-800-831-7133 to triple check.
I have a Nautilus FNS 48. I am tryin g to replace the O-ring (trapezoid shaped) that goes between the top and bottom halves of the tank under the clamp. How do I get the O-ring to stay in place to put the tank together? This tank doesn't have a lip to keep it in place.....
Hi, Mike. The o-ring must be lubricated and aid of the tank retaining ring the o-ring will be held in place.
What are the dimensions of specs of this ring/seal? also why not just have them posted with the item?
Ring Inside thickness:?
Ring Outside thickness:?
Hello- The dimensions we have are listed in two placed on this page. Under dimensions in the product description that states "DIMENSIONS 19" X 5/16" as well as in the picture that is labeled "size".
Hi, I need to replace the ring on a Nautilus FNS 48 filter installed in 2004. The documentation provided in 2004 mentions for this item: "19-5008 Seal-Trapezoid-18" DIA".
Do you think that your item O-Ring, Tank (O-420) dimension 19"x5/16" could fit with my filter ?
Hi, Alain. This Tank O-ring - O-420 is the correct replacement o-ring for the Nautilus FNS filter.
Less than 1 hr
I had been putting off this repair for a while, expecting it would be more difficult than it was. I drained the filter and lines, disassembled the stainless steel clamp around the center of the filter and removed the top.
After the top was off there is a steel ring on the inside that this gasket sits on. I removed the old dry gasket, slid this one onto the interior ring and reassembled. The leak was gone with the first try! I wish I had done this sooner!
Less than 1 hr
Screwdriver, Pliers, Socket Set
The pool company was supposed to clean the DE filtering system via backwashing it, and then once a season remove the grids, do a full wash, and put in new DE.
After the pool turned green and they failed to do a good cleaning job, we took over the maintenance and the first thing was to open the DE filter. We found it packed full of fine dirt particles to the point that there was a full 2.5 to 3" of silt on each grid; thus we had to do a full cleaning.
When the O-ring was installed it leaked in two places. It did not appear to be worn, and we did a full cleaning of the matching surfaces (ring and lips of both the top and bottom of the tank) and new silicon grease used.
It still leaked and a new O-ring (o-420) was ordered and installed. The leaks are gone, the pressure is back to 22 PSI, and the pool water is again crystal clear.
The one problem that we had was getting the clamping ring tight enough so we could put the washers, spring, and bolt back on. The tip is to not use the washers or the spring, only the bolt to tighten the clamps, then remove the bolt and install the washers, spring and bolt.
You may have to use pliers or another device to hold the clamp in place until you can get the washers, spring, and bolt on as the clamp will have a tendency to try to loosen when you first remove the bolt.
Be sure to let the air out of the tank and to drain the tank before attempting any of the DE tank disassemblies.
(5 out of 5 stars) Hard-To-Find Parts? Not Problem.
Reviewed By: Thomas H. from The Woodlands, TX ()
Pros: Fits perfect
I went to my local pool supply to get a filter gasket for my 15 year old canister filter and was told that the part was no longer available. They suggested INYOPools.com and sure enough, they have most of the part available for my discontinued unit. Nice!
(4 out of 5 stars) O-ring Tank 0-420 (DE Filter gasket)
Reviewed By: heattran from Liberty, SC ()
Pros: Inyo has an easy to use website unlike many others. They also have technical support which makes the d makes all of the ifference. A minor detail can be the difference between making the product easy
Cons: Cost was a little high
Product was delivered on time and in good condition. It was exactly what the description said. I had some concerns about delivery due to immediate need and spoke with customer service who was friendly courteous and helpful. Excellent experience overall. Great place to get whatever you need for pools and parts.