Standard size RO reverse osmosis membrane housing - 90° Ports with 1/8" FNPT Threads - Includes New O-rings and 3 90° 1/4" Jaco Fittings For 1/4" Tube, or upgrade to the John Guest Quick Connectors. The end with a single port is the inlet feed water. On the end with two ports the center port is the permeate (product) water. The offset port is the brine (waste). Learn More

O-rings For Standard Style RO Reverse Osmosis Membrane Housing. Pair of O-rings for standard style reverse osmosis membrane housings.

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Wrench To Fit Standard Size Membrane Housings. Easily open those stubborn reverse osmosis membrane housings. Learn More

TW30-1812 Stainless Steel RO Membrane Housing - High detail and quality. This high end Stainless Steel RO Membrane Housing fits standard residential TW30-1812 RO membranes, which is the most common size of reverse osmosis membrane for home RO systems. This SS Membrane Housing is the finest quality housing we have ever seen for residential RO systems. It is the last membrane housing you will ever need to buy. In stock for same day shipping. Learn More

Reverse Osmosis membrane pressure meter kit - Add this kit to your standard reverse osmosis system membrane housing to determine the incoming water pressure that is being applied to the RO membrane. This is a great way to monitor the pressure on the membrane. Easy installation. Learn More

Premium inline reverse osmosis membrane flow restrictor - Keep your system operating correctly by replacing worn flow restrictors.  Reverse Osmosis systems use pressure differencials to power the reverse osmosis process.  A worn flow restrictor will alter the proper balance. Our in-line capillary flow restrictors are very simple to install.

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John Guest PI010821S Male Connector 1/4" Tube X 1/8" MNPT For Drinking Water Systems - SOLD IN PAIRS

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John Guest PI480821S Fixed Elbow 1/4" Tube X 1/8" MNPT Quick Connectors for Drinking Water Systems - SOLD IN PAIRS

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John Guest SCV-CI480821W Check Valve. 1/4" Tube X 1/8" MNPT Fixed Elbow. Learn More

PTFE thread sealant tape permits quick, clean, economical sealing of male pipe threads of all sizes. Reduces the risk of system contamination common with liquid and paste sealants. A must use on all male threads used in reverse osmosis and pure drinking water filtration systems. Learn More

John Guest ® Poly Tubing 1/4" For Pure Drinking Filter Water Systems

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