The WET propylene filter housing FH158005 is manufactured of reinforced FDA grade polypropylene. They are sealed with a top seated Buna-N O-Ring and have an Acme squared thread closure. All caps (except Valve-in-Head models) have four mounting bosses for a ridge "L" bracket mounting. They include a pressure relief button. This filter housing is corrosive proof and don't add contaminants to the water supply.
Propylene Housing FH158005