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Reverse Osmosis Check Valve & Flow Restrictor

for 35, 50, 75, 80, 100 GPD Water filter System
 
Inexpensive insurance for your expensive membrane

      FDA Grade Polypropylene    

     
 
 

　 ● Up for Sale :

 Check Valve and Flow Restrictor (Choice of 420, 550, 800 ML)

1/8" NPT male thread elbow with 1/4" quick connect fitting

  

 

  

 

While this is a small valve and always been neglected, in fact, a working check valve can be the difference between a TOP-PERFORMING Reverse Osmosis System and a system that does NOT work.

 

It is never a bad idea to change your Check Valve and Flow Restrictor when you change your membrane, in fact, Without a properly working check valve, the unit will not shut off properly when the tank is full, a great deal of water will be wasted, and eventually the membrane will be ruined. a few dollars spent can extend the life of your system, filters, membrane and save water dramatically.

 

Flow Restrictors (also known as Flow Controls or Capillaries) are required for all reverse osmosis systems. The Flow Restrictor must be properly sized to the RO membrane capacity. Flow Restrictors create pressure throughout the reverse osmosis membrane element and maintain a desired ratio of reject flow (to drain) and permeate (product) flow.

 

Application

  • Fits standard RO membrane housings (1/8" NPT )

  • installed on the outlet port of membrane housing where pure water exits.  The check valve prevents the water from running backwards through the membrane.  

Specifications 

  • 1/8" NPT male thread elbow

  • 1/4" quick connect fitting

Features

  • Prevents the flow of water back in to the RO membrane, ensuring the system pressurizes to works properly

  • Stainless Steel Valve

  • Required with use of auto shut off valve

Guideline for selecting an inline flow restrictor

 

RO Membrane Size
(Gallons Per Day)

Use Flow Restrictor
(ML Per Minute)

36 GPD

420 ML

50 GPD

550 ML

75-100 GPD

800 ML

 

Service Life

  •  replace the Check Valve & Flow Restrictor each time you replace your reverse osmosis membrane (Recommended as a precaution)

FYI : Some other model may come with flow restrictor insert

RO Membrane Size
(Gallons Per Day)

Use Flow Restrictor
(Color)

24 GPD

Black
36 GPD Yellow
50 GPD Green
75 GPD Blue

100 GPD

White

Many RO units have small insert style flow restrictors that are inserted into the 1/8" X 1/4" elbow that connects the drain tube to the membrane vessel.

 

Check Valve & Flow Restrictor Location

Additional Parts Recommendation

Check Valve and Flow Restrictor 36 GPD Check Valve and Flow Restrictor 50 GPD
Check Valve & Flow Restrictor 75-100 GPD

Check Valve & Flow Restrictor & Auto Shut OFF Valve
 
 

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