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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.

LOW PRICES and FAST SHIPPING SINCE 1999 !

99.5% Of All Items In Stock For Same Day Shipping!

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
  1. JOHN GUEST- PI480821S- 1000
    John Guest PI480821S Fixed Elbow 1/4" Tube X 1/8" MNPT Quick Connectors for Drinking Water Systems.
    $4.99
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  2. JOHN GUEST - PI010821S - Male Connector 1/4'' Tube X 1/8"" MNPT- 1000
    John Guest PI010821S Male Connector 1/4" Tube X 1/8" MNPT For Drinking Water Systems
    $4.99
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  3. John Guest Poly Tubing 1/4" For Pure Drinking Filter Water Systems
    John Guest ® Poly Tubing 1/4" For Pure Drinking Filter Water Systems
    $0.45 Special Price $0.27 As low as $0.19
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  4. Teflon-Tape-100-1000
    Teflon Plumbing Tape To Seal Threaded Water Connectors
    $5.99 Special Price $3.39 As low as $2.75
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  5. Jaco ® Straight Tube Connector Pair
    Jaco ® Straight Tube Connector Pair
    $8.99 Special Price $4.99 As low as $2.99
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  6. Jaco ® Elbow Connector Fitting - 90 degree - Sold As a Pair
    Jaco ® Elbow Connector Fitting - 90 degree - Sold As a Pair
    $8.99 Special Price $4.99 As low as $3.99
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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.
    Learn More
    $27.99 Special Price $19.99 As low as $17.99
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  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.
    Learn More
    $6.99 Special Price $3.99 As low as $2.99
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  3. Jaco ® Run T Connector For Poly Tubing
    Jaco ® Run T Connector For Poly Tubing
    Jaco ® Run T Connector For Poly Tubing - For use in reverse osmosis systems. 1/4" tube - 1/4" MNPT
    Learn More
    $9.99 Special Price $5.99 As low as $3.99
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  4. 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
    Learn More
    $19.99 Special Price $12.99 As low as $10.99
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  5. 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
    Learn More
    $8.99 Special Price $4.99 As low as $3.49
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  6. 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
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  7. 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
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  8. John Guest Locking Clips For Speedfit Quick Connectors For Water Tubes
    John Guest ® Locking Clips For Speedfit Quick Connectors For Water Tubes
    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.
    Learn More
    $4.99 As low as $3.99
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  9. 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
    Learn More
    $8.99 Special Price $4.99 As low as $3.99
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  10. 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
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  11. John Guest Speedfit Plug Quick Connector. PI0808S, PI0812S, PI0816S
    John Guest Speedfit Plug Quick Connector. PI0808S, PI0812S, PI0816S
    John Guest Speedfit Plug Quick Connector. Use to plug a John Guest Quick Connector filting. PI0808S, PI0812S, PI0816S
    Learn More
    $4.99 Special Price $2.79 As low as $1.99
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  12. 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
    Learn More
    $9.99 Special Price $6.99 As low as $5.79
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  13. 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
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  14. 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.
    Learn More
    $14.99 Special Price $9.99 As low as $7.99
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  15. 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.
    Learn More
    $6.99 Special Price $3.99 As low as $3.39
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  16. Tank Ball Valve with Jaco Compression Fittings - 3/8'' Size- 1000
    Replacement Water Tank Valve With Jaco Fittings
    Replacement Water Tank Valve With Jaco Fittings. Fits all standard tanks. Very easy to use.
    Learn More
    $13.99 Special Price $9.99 As low as $6.39
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  17. Jaco Tube Inserts-Sold as a 10 Pack
    Jaco Tube Inserts-Sold as a 10 Pack
    Fitting Tube Insert
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    $5.99 Special Price $4.99 As low as $3.99
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  18. JOHN GUEST- Angle-Stop-Valve - 3-8 - ASV121212W / ASVPP2LF - 1000
    John Guest Angle Stop Valve 3-8 ASV121212W / ASVPP2LF
    John Guest ASV121212W / ASVPP2LF Angle Stop Adapter Valve 3/8" Male Comp X 3/8" Male Comp X 3/8" Tube
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    $13.99
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  19. Aquatec-Merlin Adaptor 1/2'' to 3/4'' John Guest Disconnect with Buna-N-O-Ring-QJS-554-1000
    Aquatec 1/2" John Guest to 3/4" Quick Disconnect With Buna N O-ring For Merlin Reverse Osmosis System Pumps
    Aquatec 1/2" John Guest to 3/4" Quick Disconnect With Buna N O-ring For Merlin Pumps.
    Learn More
    $12.99 Special Price $9.99
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  20. JOHN GUEST- SCV-PI480822S - 1000
    John Guest Check Valve SCV-PI480822S 1/4" Tube X 1/4" MNPT
    John Guest SCV-PI480822S Check Valve. 1/4" Tube X 1/4" MNPT Fixed Elbow.
    Learn More
    $15.99 Special Price $12.99
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  21. JOHN GUEST- SCV-CI40821W- 1000
    John Guest SCV-CI480821W Check Valve 1/4" Tube X 1/8" MNPT
    John Guest SCV-CI480821W Check Valve. 1/4" Tube X 1/8" MNPT Fixed Elbow.
    Learn More
    $12.99 Special Price $10.99
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  22. Easy Adaptor for water feed line tap - 1/2'' FPT x 1/2'' MPT with 1/4'' Quick Connect- 1000
    Easy Adapter for water feed line tap. 1/2" FNPT X 1/2" MNPT with 1/4" quick connector
    Easy Adaptor for water feed line tap. 1/2" FPT X 1/2" MPT with 1/4" Quick Connect.
    Learn More
    $15.99 Special Price $12.99
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  23. JOHN GUEST- PIC1808R Locking Clips 1/4'' - 1000
    John Guest PIC1808R Locking Clips for Quick Connectors 1/4"

    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
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  24. JOHN GUEST- PIC1816R Locking Clips 1/2'' - 1000
    John Guest PIC1816R Locking Clips 1/2" for Quick Connectors

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

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    $6.99
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  25. JOHN GUEST - PI010821S - Male Connector 1/4'' Tube X 1/8"" MNPT- 1000
    John Guest PI010821S Male Connector 1/4" Tube X 1/8" MNPT For Drinking Water Systems

    John Guest PI010821S Male Connector 1/4" Tube X 1/8" MNPT For Drinking Water Systems - SOLD IN PAIRS

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    $4.99
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  26. JOHN GUEST- PI011624S- 1000
    John Guest PI011624S Male Connector 1/2" Tube X 1/2" MNPT
    John Guest PI011624S Male Connector 1/2" Tube X 1/2" MNPT - SOLD IN PAIRS
    Learn More
    $4.99
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  27. JOHN GUEST- PI01082S- 1000
    John Guest PI010822S Male Connector 1/4" Tube X 1/4" MNPT for Drinking Water Systems

    John Guest PI010822S Male Connector 1/4" Tube X 1/4" MNPT for Drinking Water Systems - SOLD IN PAIRS

    Learn More
    $4.99
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  28. JOHN GUEST-PI010823S - 1000
    John Guest PI010823S Male Connector 1/4" Tube X 3/8 MNPT
    John Guest PI010823S Male Connector 1/4" Tube X 3/8" MNPT - SOLD IN PAIRS
    Learn More
    $4.99
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  29. JOHN GUEST- PI011222S- 1000
    John Guest PI011222S Male Connector 3/8" Tube X 1/4" MNPT
    John Guest PI011222S Male Connector 3/8" Tube X 1/4" MNPT - SOLD IN PAIRS
    Learn More
    $4.99
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  30. JOHN GUEST0- PI011223S- 1000
    John Guest PI011223S Male Connector 3/8" Tube X 3/8" MNPT Quick Connectors for Drinking Water Systems.

    John Guest PI011223S Male Connector 3/8" Tube X 3/8" MNPT Quick Connectors for Drinking Water Systems - SOLD IN PAIRS

    Learn More
    $4.99
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  31. JOHN GUEST- PI480821S- 1000
    John Guest PI480821S Fixed Elbow 1/4" Tube X 1/8" MNPT Quick Connectors for Drinking Water Systems.

    John Guest PI480821S Fixed Elbow 1/4" Tube X 1/8" MNPT Quick Connectors for Drinking Water Systems - SOLD IN PAIRS

    Learn More
    $4.99
    Add to Wish List Add to Compare
  32. JOHN GUEST- PI480822S - 1000
    John Guest PI480822S Fixed Elbow 1/4" Tube X 1/4" MNPT Connector

    John Guest PI480822S Fixed Elbow 1/4" Tube X 1/4" MNPT Connector for drinking water systems. - SOLD IN PAIRS

    Learn More
    $4.99
    Add to Wish List Add to Compare
  33. JOHN GUEST- PI480823S- 1000
    John Guest PI480823S Fixed Elbow 1/4" Tube X 3/8" MNPT for drinking water systems

    John Guest PI480823S Fixed Elbow 1/4" Tube X 3/8" MNPT for drinking water systems - SOLD IN PAIRS

    Learn More
    $4.99
    Add to Wish List Add to Compare
  34. JOHN GUEST- PI481222S - 1000
    John Guest PI481222S Fixed Elbow 3/8" Tube X 1/4 MNPT
    John Guest PI481222S Fixed Elbow 3/8" Tube X 1/4" MNPT - SOLD IN PAIRS
    Learn More
    $4.99
    Add to Wish List Add to Compare
  35. JOHN GUEST- PI481223S - 1000
    John Guest PI481223S Fixed Elbow 3/8" Tube X 3/8" MNPT With Quick Connectors for Drinking Water Systems

    John Guest PI481223S Fixed Elbow 3/8" Tube X 3/8" MNPT With Quick Connectors for Drinking Water Systems - SOLD IN PAIRS

    Learn More
    $4.99
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  36. JOHN GUEST- PI0808S Plug 1/4'' Tube- 1000
    John Guest PI0808S Plug 1/4" Tube for Quick Connectors on Drinking Water Systems

    John Guest PI0808S Plug 1/4" Tube for Quick Connectors on Drinking Water Systems

    Learn More
    $2.79
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  37. JOHN GUEST-PI0816S Plug 1/2'' - 1000
    John Guest PI0816S Plug 1/2" Tube for Quick Connectors on Drinking Water Systems

    John Guest PI0816S Plug 1/2" Tube for Quick Connectors on Drinking Water Systems

    Learn More
    $3.79
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  38. JOHN GUEST- PI0812S Plug 3/8'' Tube - 1000
    John Guest PI0812S Plug 3/8" Tube
    John Guest PI0812S Plug 3/8" Tube
    Learn More
    $3.29
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  39. JOHN GUEST-PI0412S- 1000
    John Guest PI0412S Straight Union Connector 3/8" Tube X 3/8" Tube
    John Guest PI0412S Union Connector 3/8" Tube X 3/8" Tube
    Learn More
    $7.99
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  40. JOHN GUEST- PI201208S- Reducing Union Connector- 1000
    John Guest PI201208S Reducing Union Connector 3/8" Tube X 1/4" Tube for Drinking Water Systems

    John Guest PI201208S Reducing Union Connector 3/8" Tube X 1/4" Tube for Drinking Water Systems

    Learn More
    $8.99
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  41. JOHN GUEST- PPSV500822W- Tank Shut-Off Valve 1/4'' - 1000
    John Guest PPSV500822W Tank Shut-Off Valve 1/4" Tube X 1/4" FNPT 90 For Drinking Water Systems

    John Guest PPSV500822W Tank Shut-Off Valve 1/4" Tube X 1/4" FNPT 90 For Reverse Osmosis Tanks

    Learn More
    $11.99
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  42. JOHN GUEST- PPSV501222W- Tank Shut-Off Valve- 3/8'' - 1000
    John Guest PPSV501222W Tank Shut-Off Valve 3/8" Tube
    John Guest PPSV501222W Tank Shut-Off Valve 3/8" Tube X 1/4" FNPT 90
    Learn More
    $12.99
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  43. JOHN GUEST- PI0208S Union Tee 1/4'' Tube X 1/4'' Tube X 1/4'' Tube - 1000
    John Guest PI0208S Union Tee 1/4" Tube X 1/4" Tube X 1/4" Tube for Drinking Water Systems

    John Guest PI0208S Union Tee 1/4" Tube X 1/4" Tube X 1/4" Tube for Drinking Water Systems

    Learn More
    $9.99
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  44. JOHN GUEST- PI301612S Reducing Tee 1/2'' Tube X 3.8'' Tube - 1000
    John Guest PI301612S Reducing Tee 1/2" Tube X 3/8" Tube X 1/2" Tube
    John Guest PI301612S Reducing Tee 1/2" Tube X 3/8" Tube X 1/2" Tube
    Learn More
    $12.99
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  45. JOHN GUEST- PI0212S Union Tee 3/8'' Tube X 3/8''' Tube - 1000
    John Guest PI0212S Union Tee 3/8" Tube X 3/8" Tube X 3/8" Tube for Drinking Water Systems

    John Guest PI0212S Union Tee 3/8" Tube X 3/8" Tube X 3/8" Tube for Drinking Water Systems

    Learn More
    $10.99
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  46. JOHN-GUEST-Tee-3-8 X 1-4 - PI301208S Reducing Tee- 1000
    John Guest PI301208S Reducing Tee 3/8" Tube X 1/4" Tube X 1/4" Tube
    John Guest PI301208S Reducing Tee 3/8" Tube X 1/4" Tube X 3/8" Tube
    Learn More
    $11.49
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  47. JOHN GUEST- PI051223S- Stem Adapter 3/8'' & 3/8'' NPTF Threads- 1000
    John Guest PI051223S Stem Adapter 3/8" Stem X 3/8" MNPT for drinking water systems

    John Guest PI051223S Stem Adapter 3/8" Stem X 3/8" MNPT for drinking water systems - SOLD IN PAIRS

    Learn More
    $5.99
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  48. JOHN GUEST- Faucet Connector 1/4'' Tube x 7/16''-1000
    John Guest CI3208U7S Faucet Connector 1/4" Tube X 7/16 Pipe Thread
    John Guest CI3208U7S Faucet Connector 1/4" Tube X 7/16-24 UNS Thread
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    $4.99
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  49. JOHN GUEST- Faucet Connector 3/8' -' Tube 7/16''- 1000
    John Guest CI3212U7S Faucet Connector 3/8" Tube
    John Guest CI3212U7S Faucet Connector 3/8" Tube X 7/16-24 UNS Thread
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    $5.99
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  50. JOHN GUEST- PPSV040808W- In-Line Shut-Off Valve- 1/4''- 1000
    John Guest PPSV040808W In-Line Shut-Off Valve 1/4" Tube
    John Guest PPSV040808W In-Line Shut-Off Valve 1/4" Tube X 1/4" Tube
    Learn More
    $9.99
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Parts Department
Parts Department

Replacement water faucets, water pumps, tanks, UV, drain saddles, o-rings, wrenches, valves, water accumulator tanks, fittings, TDS meters, water filters, reverse osmosis membranes, parts for reverse osmosis and pure water drinking systems. Low prices and fast shipping online since 1999. Quantity discounts. Millions sold. DIY HELP Guides.

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Water Chillers
Water Chillers

Chiller Daddy Water Chillers for RO reverse osmosis water purification systems - Chiller Daddy CHL-501 & CHL-750XL Undersink and under cabinet water chillr.

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Installation and Trouble Shooting Guide
Installation and Trouble ...

Water Filter System and Reverse Osmosis System Installation and Service Guide. Huge inventory of replacement water filters , reverse osmosis membranes and maintenance service parts. Low prices and fast shipping online since 1999. Millions sold.

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Faucets for RO Reverse Osmosis or Filter Systems
Faucets for RO Reverse ...

Replacement Air Gap and Non Air Gap Faucets For Reverse Osmosis RO Systems, Pure Water Systems And Water Coolers - TouchFlo Faucets. Low prices and fast shipping online since 1999. Millions sold. Quantity discounts. DIY HELP Guides.

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Leak Controllers
Leak Controllers

Leak Controller For Reverse Osmosis Systems, Refrigerators, Ice Makers and Coffee Machines. Low prices and fast shipping online since 1999. Millions sold. Quantity discounts. DIY HELP Guides.

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Tanks
Tanks

Amtrol Reverse Osmosis Accumulator Water Storage Tanks - Water tanks for reverse osmosis drinking water systems. Low prices and fast shipping online since 1999. Millions sold. Quantity discounts. DIY HELP Guides.

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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.

SEE OUR ONLINE HELP GUIDE

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