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and RO units
restoring smooth
It is designed for standard 1/4” Stenner pump fittings
but the tank’s materials resist corrosion and buildup effectively
this piston helps prevent leaks and maintains system pressure
Guest 3/8x1/4 R Union water and RO unitsThe John Guest 3 8" x 1 4" Reducing Union from Reliance Worldwide Corporation joins two different tube sizes inline, letting a 3 8" line transition cleanly to a 1 4" line without threads or tools. It is a common fitting in water filtration and reverse osmosis systems, where supply and distribution tubing frequently differ in diameter and need a tidy, leak free connection between them. Mixed tubing sizes are routine in point of use treatment plumbing.
