APEC Replacement ORing for ROES-50 3.5" OD Reverse Osmosis Water Filter Housings, O-Ring (3 pcs O-Ring-Set-A)

These fit, as they should once, I figured out how to remove the old ones. It was easy to replace them. They are a good value for the money. The thickness matches, where it needs to to keep everything sealed. They seem to be of higher quality and they appear to be very durable

They work fine but these should really be included with the filter cartridge since they recommend replacement with every filter change. I rank these high though because after a year on the system, they still looked like they were brand new and could be used again. I still changed them just because they are cheaper than a flooded house and not worth the risk.

This was a perfect fit for my water system. Just make sure to carefully look at the photo description as this company makes two sizes! it's very easy to accidentally choose the wrong one if you are not paying attention. All you have to do is match the filter housing to the photo and you will know if it will fit or not. I applied some food-grade silicone to the O-ring to give it a better seal. You can also put some of that silicone on the rubber gaskets on both sides of the carbon filters (stages 2-3). This helps it seal much better. I noticed that if I did not apply the silicone to the carbon filters there is usually a buildup of gunk (??) on the top seal which tells me the seal may not have been performing as it should. I love the APEC Roes-50 water system! It has made a huge difference in our water quality (and we sure don't miss having to carry all of those heavy 5-gallon water bottles from the store)!

It's hard to sit the ring in the socket - this is obviously larger than the original ones. But once installed it fixed the leak.

Seemed a bit oversized for the same setup I've used for years.

Used in conjunction with point of use water filtering kits. Helps prevent leaking filter housings.Fits apec reverse osmosis pre filter housings.

I had no trouble replacing the o-rings for the three primary filters on my APEC Reverse Osmosis system and these o-rings worked perfectly in every respect.I did read some reviews indicating the o-rings were thinner than the originals, had a larger outside diameter than the originals and/or did not seal properly. I saw none of those problems and think I may know how to avoid those issues:• First and foremost, be sure to order the correct version. There is a Type “A” for systems manufactured before a certain pair of dates and a Type “B” for systems manufactured after those dates. Clicking on the Type “B” box will provide those dates. Be sure to select the correct (“A” or “B”) box before proceeding with ordering. My system was manufactured in 2018 so I ordered Type “B” and the replacement o-rings appeared identical to the originals.• I used food grade o-ring grease on all 3 o-rings and on the flat rubber washers at each end of the two carbon filters which I was installing. I spread the grease thinly but thoroughly over the surface of all items. The grease prevents friction loads which can damage rubber parts and can give a false indication of the torque applied. There are many brands available; I used Haynes Lubri-Film sanitary lubricant which costs about $8 for a 4 oz tube but will lubricate many o-rings per tube.• I used the wrench provided with the original set to tighten each filter case after installing. I pulled until each was a little more than firm; perhaps a 5-8 lb pull on the wrench.Good luck. I hope this has been helpful.

I tried the APEC Water Systems SET 3 Pcs 3.5" O.D. Replacement O-Ring, and it's a lifesaver. The three-piece set ensures a snug fit for reverse osmosis water filter housings. The black O-rings are durable and efficient, sealing tight to prevent leaks. If you're maintaining a water filtration system, this replacement set is a reliable choice.