The Pentair Pentek 150467 Big Blue filter housing is engineered for whole house water filtration where high flow rates and large cartridge capacity are essential. Its #20 Big Blue design accepts any standard 20" x 4.5" filter cartridge, giving you the flexibility to address sediment, taste, odor, and other water quality concerns with a single housing. The 3/4" NPT threaded inlet and outlet ports ensure straightforward installation on residential and light commercial supply lines.Constructed with a durable polypropylene sump, a High-Flow Polypropylene (HFPP) cap, 300-series stainless steel button assembly, and EPDM O-ring, this housing is built to withstand continuous operation up to 90 psi and water temperatures from 40 to 100 degrees Fahrenheit. The integrated pressure relief button on the cap lets you safely depressurize the system before opening, making routine cartridge replacements quick and clean.Certified to NSF/ANSI Standard 42 for material safety. Overall dimensions are 23.04" x 7.38". Replacement O-ring and wrench sold separately. Compatible with Pentair Pentek Big Blue mounting brackets for secure wall installation.