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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Fittings and Connectors

Fittings and Connectors

 

Jaco ® Compression, John Guest SpeedFit, SMC, and Sea Tec Fittings and Connectors For Reverse Osmosis Drinking & Pure Water Filtration Systems

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

 

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  1. Inline Check Valve - Back Flow Prevention - John Guest Speedfit Quick Connection 1/4SCV and 3/8SCV
    Inline Check Valve - Back Flow Prevention
    Inline Check Valve - Back Flow Prevention - Check Valve- 1/4" quick connect - one way flow, Easy to install. 1/4SCV and 3/8SCV or John Guest Elbow Fitting for Membrane Housing.
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    $27.99 Special Price $19.99 As low as $17.99
  2. Jaco ® Nipple Connector Fitting - Male Threads MNPT
    Jaco ® Nipple Connector Fitting - Male Threads MNPT
    Jaco ® Nipple Connector Fitting MNPT - Male threaded Nipple Connects Two Female Threads. Commonly used to connect two filter housings together, or, to connect two female threaded FNPT parts.
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    $6.99 Special Price $3.99 As low as $2.99
  3. John Guest Angle Stop Water Valve
    John Guest ® Angle Stop Water Valve
    John Guest ® Angle Stop Water Valve - Makes installation a snap. Very simple to use. PPASV121208W and PPASV121212W
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    $19.99 Special Price $12.99 As low as $10.99
  4. John Guest water faucet adaptor with quick connector for poly tube
    John Guest ® water faucet adaptor with quick connector for poly tube
    John Guest ® faucet adapter with quick connector for poly tube - Easy quick connect push in installation. 7/16-24 UNS thread to attach to faucet. Cut the end of the tube square ensuring it is free of score marks and burrs. Slip all of the way into and it locks shut. Easy to remove and reuse. 7/16-24 UNS thread to attach to faucet. Choose your tube size. CI3208U7S and CI3212U7S
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    $8.99 Special Price $4.99 As low as $3.49
  5. John Guest inline water shut off valve
    John Guest ® inline shut off valve
    John Guest ® inline shut off valve - Easy to install push in quick connectors. PPSV040808W and PPSV041212W
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    $17.99 Special Price $9.99 As low as $7.99
  6. John Guest ® Reducer - 1/4" tube to 3/8" stem (pair) PI061208S
    John Guest ® Reducer - 1/4" tube to 3/8" stem (pair) PI061208S
    John Guest ® Reducer - 1/4" tube to 3/8" stem. Easily connects 1/4" tubing to 3/8" female quick connect push in fittings. (price per pair) PI061208S
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    $11.99 Special Price $6.99 As low as $4.99
  7. John Guest Locking Clips For Speedfit Quick Connectors For Water Tubes
    John Guest ® Locking Clips For Speedfit Quick Connectors 10 Per Pack
    John Guest ® Locking clips secure the collet in position on John Guest Quick Connector to prevent an accidental disconnection of the tube. PIC1808R, PIC1812R and PIC1816R. PIC1808R = 1/4 " PIC1812R = 3/8 " PIC1816R = 1/2". Price is for a packet of 10.
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  8. John Guest Super Speedfit Quick Connector - Male - Straight
    John Guest ® Super Speedfit Quick Connector - Male - Straight
    John Guest ® Super Speedfit Quick Connectors - Male - Straight - MNPT - Sold in pairs. Price is per pair. These fittings are manufactured in gray acetal copolymer with food grade nitrile ‘o’ ring, making them especially suitable for applications involving foodstuff and potable liquids like reverse osmosis drinking water. They are equally suitable for air and inert gasses and can therefore be used on CO2 lines, pneumatic applications, and vacuum. For more than a decade, John Guest has been supplying Super Speedfit fittings to the Water Purification market for drinking water applications in homes, restaurants and industry. John Guest products are listed with the WRC(UK), NSF(US) and SK(Germany). PI010821S , PI010822S , PI010823S, PI011222S , PI011223S
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    $8.99 Special Price $4.99 As low as $3.99
  9. John Guest Super Speedfit Quick Connector - Male - Elbow
    John Guest ® Super Speedfit Quick Connector - Male - Elbow
    John Guest ® Super Speedfit Quick Connector - Male - Elbow - John Guest Super Speedfit Quick Connectors - Male - MNPT - Sold in pairs. Price is per pair. These fittings are manufactured in gray acetal copolymer with food grade nitrile ‘o’ ring, making them especially suitable for applications involving foodstuff and potable liquids like reverse osmosis drinking water. They are equally suitable for air and inert gasses and can therefore be used on CO2 lines, pneumatic applications, and vacuum. For more than a decade, John Guest has been supplying Super Speedfit fittings to the Water Purification market for drinking water applications in homes, restaurants and industry. John Guest products are listed with the WRC(UK), NSF(US) and SK(Germany). PI480821S , PI480822S , PI480823S , PI481222S , PI481223S
    Learn More
    $8.99 Special Price $4.99 As low as $3.99
  10. John Guest ® Straight Union Connector
    John Guest ® Straight Union Connector
    John Guest ® Straight Union Connector - Connects tube to tube using SpeedFit Quick Connectors. PI201208S , PI0408S , PI0412S
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    $9.99 Special Price $6.99 As low as $5.79
  11. John Guest Speedfit Water Tank Valve For Reverse Osmosis Systems
    John Guest ® Speedfit Tank Valve For Reverse Osmosis Systems
    John Guest ® Tank Valve For Reverse Osmosis Systems - These valves are manufactured in white polypropylene with food grade EPDM 'O' Rings for use with potable water. This fitting is made of the following components: The body is produced in polypropylene. PPSV500822W and PPSV501222W.
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    $17.99 Special Price $11.99 As low as $9.99
  12. John Guest ® Tee Connector For water Systems - Quick Connectors
    John Guest ® Tee Connector For Water Systems - Quick Connectors
    John Guest ® Tee Connector - Quick Connectors - All equal size connections or one port different for adaption. The body is produced in acetal copolymer. 'O'Rings are nitrile rubber. The collet is produced in acetal copolymer with stainless steel teeth. PI0208S , PI0212S , PI301208S , PI301612S.
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    $14.99 Special Price $9.99 As low as $7.99
  13. John Guest Speedfit Plug In Stem Elbow Quick Connector PI220808S, PI221208S, PI221212S, PI221616S
    John Guest Speedfit Plug In Stem Elbow Quick Connector PI220808S, PI221208S, PI221212S, PI221616S
    John Guest Speedfit Plug In Stem Elbow Quick Connector For Water Filtration Systems. Easy to install and uninstall. Simply insert and this plug in eblow will create a 90 degree elbow corner turn. PI220808S, PI221208S, PI221212S, PI221616S.
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    $6.99 Special Price $3.99 As low as $3.39
  14. JOHN GUEST- PIC1808R Locking Clips 1/4'' - 1000
    John Guest PIC1808R Locking Clips 1/4" 10 Per Pack

    John Guest PIC1808R Locking Clips for Quick Connectors 1/4" for RO reverse osmosis systems and under counter water filter systems. (Package of 10)

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    $4.99
  15. JOHN GUEST- PIC1816R Locking Clips 1/2'' - 1000
    John Guest PIC1816R Locking Clips 1/2" 10 Per Pack

    John Guest PIC1816R Locking Clips 1/2" for Quick Connectors on RO Reverse Osmosis & Under Counter Water Filter Systems. (Package of 10)

    Learn More
    $6.99
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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.