
These diaphragms aren't cheap for a reason. Do not use with standard Hydrologic reverse osmosis. They look and match the same, but there was little to no water flow and the water was wasted. 10 liters drained in 24 hours. Gave them back and bought hydrological membranes which are three times more expensive but worked much better.

NANPU DFR-02 1/4" NPT Air Drying System - Double Air Filters, Air Pressure Regulator Combo - Semi-Auto Drain, Poly Bowl
20 Review

NANPU Air Drying System With Double Filters And Pressure Regulator Combo For Clean And Controlled Air Supply
18 Review

NANPU 3/8" NPT Compressed Air Filter Regulator Combo Piggyback, 5 Micron Brass Element, Poly Bowl, Semi-Auto Drain, Metal Bracket, 0-150 Psi Gauge
26 Review

Filter under the sink Aquaphor Favorit ECO silver
20 Review