This is a heavy duty filter system however the brass inserts on the inlet and outlet holes have very poor tolerances, so large that even 10-12 turns Teflon tape couldn't seal them and both leaked.I've tried various methods of teflon tape and pipe lube and still couldn't stop the leak at only 45-50psi.This happened to the first one I received so I sent it back and got the second one both bad finally bought a quality block from Bulk Reef Sales - works great!
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