2 Stage 20" Dual Big Blue Filter Housing Set with Pressure Release Valve & Double O-Rings

ROYOL Water 20" Dual Big Blue Filter Housing Set, clear + blue combo.

Clear housing lets you visually check dirt buildup on cartridges for timely replacement to prevent secondary contamination; blue opaque housing blocks light to stop algae growth and extend activated carbon filter lifespan.

Equipped with double-layer NBR O-rings and top pressure relief valve for leak-tight sealing.

Fits all types of 20" Big Blue filter cartridges, available with brass & plastic inlet/outlet ports. Comes with metal wall bracket.

Ideal for whole-house pre-filtration, well water, catering business and irrigation; 10" size is also available.

• Dual 20" Big Blue Housings (Clear+Blue):Clear housing spots sediment for on-time filter replacement; blue light-proof sump stops algae on carbon cartridges.
• Double NBR O-Rings + Pressure Relief Valve:Dual sealing prevents leaks; built-in valve releases pressure safely for easy cartridge change.
• Universal for All 20" Big Blue Cartridges:Works with PP, carbon, composite & anti-scale filters, customizable for tap or well water.
• Multi-size Ports for Global Plumbing:Brass (3/4",1") & Plastic (1",1.5") ports; robust PP material, available in 10"/20".
• Free Metal Mount Bracket & Wide Application:Easy wall mounting; ideal for whole-house, commercial, RO pre-filter and irrigation use.