Water Filter Superstore for Drinking Water Online Since 1999

Filter Connector & Tube Sizing

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 for important parts such as , , , , , , , and more parts for your reverse osmosis pure water filtration system.   View maintenance and servicing tips online at our Installation & Trouble shooting Guide.