[wilf leek]

Hmm, interesting.

I use one of these glass filters on the suction side of my electric pump, mounted above the tank (so no gravity drain possible) in the trunk (protected by a wire mesh cage).
The one I have has proper nitrile round section "O" rings in it, and the internal threaded elements which hold it together are all metal, not plastic.
I like being able to see what crud is being filtered out - had some sob put silicone sealant in my tank once out of spite, only found out what was happening due to the glass filter.
Not had a problem with a filter of this type in use for over 8 years, what do you think?