Large selection of replacement water filters, reverse osmosis membranes, testing kits and water filter system repair parts. From one water filter or membrane to case quantity discounts.

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Tube - Poly Tubing

Tube - Poly Tubing

 

John Guest Poly Tube for RO Reverse Osmosis and Water Filter Pure Drinking Water Filtration Systems. Tubing, piping, hose, connector lines - Call it what you want, John Guest is the premium poly tube manufactuter.

Be sure you order the correct size connectors and tube for the replacement filters for your drinking water system.


These two filters with the blue and orange "sanitary plugs" are female threaded and require a threaded fitting to be screwed into it.  The sanitary plugs are to be removed and discarded as the connector is installed.  The blue sanitary plug indicates 1/4" FNPT and the orange is 3/8" FNPT (Female National Pipe Thread) standard.

Replacement Water Filter Connector Sizes    Replacement Water Filter Connector Sizes

 

The following two filters show a 1/4" quick connector and a 3/8" quick connector.  Tube size is measured by the outside diameter of the tube.  Quick connect fittings are measured on the inside of the port.  

Replacement water filter quick connector sizing    3/8" water filter quick connector

Helpful Items

 

Be sure to check our Parts Department for important parts such as TDS Testers For Reverse Osmosis Membranes, Replacement Tanks, O-rings , Filter Housing Wrenches, Faucets, Pumps, Fittings, UV Systems and more parts for your reverse osmosis pure water filtration system.   View maintenance and servicing tips online at our Installation & Trouble shooting Guide.