Filters and O rings are
"Filters and O rings are as shown on web page. Arrived as advertised👍"
Pentair 151121 O-ring for Filter Housings Buna 237
Q&As
Pentair 151121 O-ring for Filter Housings Buna 237
Q&As
Part Number:
151121
Alt Part Number:
OR-38
200408
100802
143026
...
close
Replacement O-ring restores a secure watertight seal for slimline and standard filter housings.
Read More
IN STOCK
Description
Replacement O-Ring for 1/4", 3/8", and 1/2" Inlet Slimline and Standard Filter Housings. The O-Ring is made of Nitrile Rubber or Buna-N rubber for added strength and elasticity to create create a tighter seal. The O-Ring creates a watertight seal in the housing and must be replaced if damaged.
Specs
- Inside Diameter: 3-3/8"
- Outside Diameter: 3-3/4"
This Item Fits These Select Systems
Overall rating: 4.888889 / 5 from 9 reviews.
AI Generated Review Summary
Summary topics
Review topics: ["service","filters"].
Review highlights
Reviews
Filters and O rings are
"Filters and O rings are as shown on web page. Arrived as advertised👍"
O-ring replacement.
"I had a small leak and this o-ring fixed it. On my next filter order I'm going to order and replace the o-rings from now on. Thanks."
Excellent service. Thank you
"Excellent service. Thank you"
Exact Fit
"This part was a perfect replacement for an existing, torn, o-ring."
Got the last products quickly
"Got the last products quickly and Freeman has been very helpful through the whole fiasco. I finally secured the last part from Premier, just need to get the filter out and install the last part to hopefully finally have my problem solved."
Great Tech Support Response
"Had an issue with the charcoal filter fitting size. Correct replacement filter was sent out immediately. Pleased with tech supports quick and rapid service."
Friendly and knowledgeable customer service
"Friendly and knowledgeable customer service and product shipped out quickly. Good pricing as well."
Great job fast service
"Great job fast service"
Great filters
"My advice to you is make sure you order the right filters. I have ordered in the past and have received 2 filters that will not work in my system. I was told that I could use those in place of others but they will not work for my system. Make sure on your order because they are not returnable."
Q&A
Q:
Which systems does the catalog associate with the Pentair 151121 O-ring?
A:
The catalog lists GREEN RO 4 (GRO-50-4), GREEN RO 5 (GRO-50-5), Ultima VI, and Ultima VII. Verify the system model or the existing 151121 seal before ordering.
Q:
What are the dimensions of the 151121 O-ring?
A:
ESP lists an inside diameter of 3-3/8 inches and an outside diameter of 3-3/4 inches. It is also identified as a Buna 237 seal.
Q:
What material is the 151121 made from?
A:
It is Buna-N, also called nitrile rubber, selected for elasticity and a watertight housing seal.
Q:
Can a new O-ring stop a filter-housing leak?
A:
It can correct a leak caused by a cut, flattened, stretched, or misplaced seal. Also inspect the housing, cap threads, pressure-relief button, and plumbing connections.
Q:
Should I lubricate the 151121 during installation?
A:
Use only a light coating of food-grade silicone lubricant if the housing instructions allow it. Seat the O-ring evenly and do not use petroleum-based lubricant.
Q:
Do I need to replace the O-ring at every filter change?
A:
Not necessarily, but inspect it every time the housing is opened. Replace it when damaged, deformed, hardened, or unable to seal reliably.
