Just "prefilters" mostly although one is a carbon filter and one is a sediment filter (I forget how many microns for the ones we use but there are varying grades, e.g., a 5 micron or a 10 micron, etc.)
OA would know what you need, just get in touch with them maybe.
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-- Tony
My next hobby will be flooding my basement while repeatedly banging my head against a brick wall and tearing up $100 bills. Whee!
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