When Should I Replace My Pool Filter O-Ring?

Changing out o-rings in your pool equipment can seem like a quick and easy task. And it is. Compared to other replacement parts, o-rings are rather inexpensive and are fairly easy to replace. However, failing to replace your o-ring can cause damage to other parts within your pool equipment resulting in a lot more spending.

O-rings and gaskets are typically made from an elastic-type rubber and are designed to seal, or in our case, help prevent water from entering in. O-rings are prevalent in most pool equipment including pumps, filters, chlorinators, valves, and heaters. Most pool owners know at some point they need to change the o-rings on their filter. However, most are unsure when and how often.

Pool filters may come with several different o-rings, but the one that tends to wear the most is the tank o-ring. The tank o-ring is the large round o-ring located between the filter head and filter body. It can be found in all three types of pool filters: sand, cartridge, and diatomaceous earth (D.E). Sand and D.E filters may have additional smaller bulkhead and valve o-rings which should also be changed routinely.

Pool owners tend to replace their filter o-ring once they notice water leaking down their tank. The only problem with waiting until you see the leak is the potential damage it can cause in the meantime. O-rings should be checked every time you replace your cartridge or grid elements and every time you clean your filter. It is never a bad idea to check other parts while your have a particular part open, whether a filter, pump, or chlorinator. Examine the o-ring for tears, rips, cracks, or any damage or defect that may compromise the seal.

Three Indicators of a Bad Seal

1. 

   The filter seems to leak when under pressure or when the filter is turned off.

2. If your pump is losing pressure and you checked your pump for leaks. A faulty seal in your filter could be the culprit.
3. An increase in water loss in an above ground pool.

All of these are signs that the filter o-ring may not be reliable anymore and we recommend you change it immediately

Once you purchase your new o-ring, there are a few steps you can take to prolong its life. O-rings should last several pool seasons with proper care. Be sure to examine the new o-ring before installing it. If you see any tears, rips, or anything that seemingly compromises the quality of the o-ring, do not install it and return for a replacement.

Also, use the proper lubrication for your o-ring. You should use Magic Lube II or another silicone-based lubricant, not Teflon. Teflon will dry out the rubber and eventually cause it to crack.

O-rings vary depending upon the make and model of the filter. If you need help identifying the correct o-ring for your filter, do not hesitate to give us a call at 877-372-6038. We’re always here to help!