Slim Line filter housings are available in either reinforced polypropylene. The reinforced polypropylene housing caps are available with 3/8" NPT connections. Four bosses are molded into every cap for mounting purposes. Excellent for low-flow applications and when space and chemical compatibility are primary concerns.Slim design reduces space required for installation without sacrificing capacityFDA gradePressure Release button/bleed button on inlet side of capLeak-proof sealing with top-seated Buna-N O-ringOPAQUE SLIM LINE HOUSINGSMolded from rugged reinforced polypropylene, these housings are ideal for under-sink and countertop residential filtration, pre- and post-reverse osmosis filtration, recreational vehicle filtration, food service, humidifying systems and light commercial and industrial filtration.Materials of ConstructionHousing: Styrene Acrylonitrile (Clear) and Polypropylene (Opaque)Cap: Reinforced PolypropyleneButton Assembly: 300-series Stainless Steel, Polypropylene and EPDMO-Ring: Buna-NMaximum Temperature: 125°F (51.7°C)Maximum Pressure: 125 psi (8.62 bar)Maximum Dimensions: 21-7/8" x 4-3/8"Initial Pressure (PSI) @ Flow Rate (GPM): 2 PSI @ 5 GPM