Whatts-HD4500BB34PR Flowmatic Black Filter Housing Heavy Duty 10 in With 3/4 in Ports And Pressure ReleaseWatts Heavy Duty Filter Housing Whatts HD4500BB34PR Flowmatic 10" Black Housing with 3 4" Ports Industrial grade polypropylene housing with pressure release valve and reinforced construction for demanding whole house filtration 100 PSI Max Pressure 3 4" NPT Ports FDA Grade Polypropylene Pressure Relief Valve The Watts Flowmatic HD4500BB34PR is built for installations where standard housings fail. Thick reinforced walls and buttress threading handle