From the United States of America? - Checkout our specific plumbing forum for you:USA Plumbing Forum

Discuss Oil Tank filter in the Oil and Solid Fuel Forum area at

I went to check the filter on my oil tank (plastic, bunded, 1300l)which I fitted two years ago. 5000l of oil had been used with no problems to date but I thought I'd check since the tank was filled last week.
I thought when I fitted the filter supplied with the tank that it was a poor design of seal on the bowl...

Screenshot from 2019-09-19 12-13-54.png
Sure as eggs is eggs, after checking the filter (clean as a whistle) I could not get the bowl to seal on refitting. Luckily I had one square section O ring in my garage (never throw ANYTHING away is the motto) which did the job, but I have no idea whether this is a nitrile seal or not, so it may not last.
Where can I find the square section O rings needed for these filters? I can't find anything to date from the tank suppliers I've tried & Simply Bearings & other sites I know of don't list square section seals. Are these available from plumber's merchants (e.g City Plumbing which I've used locally since they used to be Kennedy's!)
or do I need to buy some square section Nitrile or Viton & make my own?


Staff member
S. Mod
Gas Engineer

Reply to Oil Tank filter in the Oil and Solid Fuel Forum area at Plumbing questions, answers, tips and tricks.

Plumbing and Plumbers

Plumbing Workwear

Shower Power Booster

Water Underfloor Heating

CORGI Direct for Plumbers

The Wetroom Store

Plumbase Spares

New Posts Threads Members