💎 DURABLE STRUCTURE: 20”x 4.5” Blue High Capacity Housing is proper for high-flow applications. The housing body is made of reinforced polypropylene for strength and resistance to chemicals, and the black cap is made of high-flow polypropylene for toughness. The cap has 1" inlet/outlet brass ports which allowed better-sealed connections to the corresponding pipes. 20”x 4.5” Granular Coconut Shell Activated Carbon Filters are used for effectively removing chlorine, bad taste & odor from water 💎 POINT OF USE: This System is for use in various high-flow applications and is usually placed in the main water line entering the house including, but not limited to residential drinking water filtration, well water filtration, food service, and irrigation. Extends life of Washing Machines, Water Heaters & Other Household Appliances. Keeps water fresh by reducing and removing iron, manganese, chlorine, hydrogen sulfide, herbicides, pesticides, and other industrial chemicals. 💎 EASY TO OPERATE: There is a rubber O-ring on the top of the housing body to ensure a watertight seal. A pressure relief button on the inlet side of the cap releases pressure in the housing for changing filter cartridges. Unique cap design allows quick and easy to remove the housing to replace cartridges. 💎 GRANULAR ACTIVATED CARBON CARTRIDGE is wrapped & sealed & meets NSF Standards & Regulations. WELL-MATCHED Models of Cartridges: Pelican Water PRL-RCL, Pelican CB-BB-20, EPM-20BB, CBC-20BB, CB-BB-20, iSpring FC25B, Hydronix CB-45-2005, CB-45-2010, Watts WCBCFF20, BC20-BB-5, FLTWH2045C02, however for best preferment use only original RONAQUA CARTRIDGES. Cartridge Lifetime - 20,000 gallons - replace 2 or 3 times a year - depending on your water quality. 💎 WELL-MATCHED MODELS OF HOUSINGS: Water Filters Depot (WFD) H-20BB-1PR, Geekpure BB-20B, iSpring HB28BX2, and WGB12B, HFPP-1-PR20, Premier Water Systems WF45-20-1NPT, SimPure RSWHB002Z_S8, Aquaboon AB-WH20BB, H-H201BBE, H2O Splash WHBB20T1BL, Hydronix HX-HF45-20BLBK10, Max Water B078FPN68M The 20"x 4.5" Blue High Capacity Housing for Whole House Water Filtration System with 1" Inlet / Outlet Ports (RA-124-20) is proper to use for reducing sediment, dirt, rust, & suspended particles in incoming water to your house. The blue housing body is made of reinforced polypropylene for strength and resistance to chemicals, and the black cap is made of high-flow polypropylene for toughness. The black cap has 1" inlet/outlet brass ports which allowed better-sealed connections to the corresponding pipes. There is a rubber O-ring on the top of the housing body to ensure a watertight seal. A pressure relief button on the inlet side of the cap releases pressure in the housing for changing filter cartridges. Those Housings are for use in various applications and are usually placed in the main water line entering the house including, but not limited to residential drinking water filtration, food service, and irrigation. Easy to connect multiply housings in one Custom Whole House Water Filtration System to fit your specific needs. WARNING: OPERATING PRESSER NO MORE THAN 60 PSI