Mazzei - ISO 684 Series - 20mm Male BSPT Inlet/Outlet Connections (0.25" Barbed Suction Port Cap) Culligan AC-50 Reverse Osmosis System Its universal cap design fits

Its universal cap design fits all permanent existing heads

so manual pressure relief is required before opening the housing for cartridge changes

Remove old cartridge and clean the housing sump with mild soap and water

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Mazzei - ISO 684 Series - 20mm Male BSPT Inlet/Outlet Connections (0.25" Barbed Suction Port Cap) Culligan AC-50 Reverse Osmosis System Its universal cap design fitsThe Mazzei ISO 684 Series venturi injector delivers precision chemical and air injection through patented internal mixing vanes that create thousands of microbubbles for maximum solubility. Built from chemical resistant PVDF with 20mm male BSPT connections and a 0. 25" barbed suction port, this differential pressure injector operates without moving parts for reliable, low maintenance performance. SPECIFICATIONS Mazzei ISO 684 Technical Details Model