Replacement water filters, RO reverse osmosis membranes and whole house filter systems. Refrigerator water filters, pool and spa filter. Pentek, OMNIFILTER water filters.

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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 ONLINE SINCE 1999 !

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

John Guest Fittings

John Guest Fittings

 

John Guest Speed Fit Quick Connect Connectors and Fittings For RO Reverse Osmosis and Under Counter Drinking Water Systems

John Guest®

See John Guest Speed Fit Quick Connector Instructions For Use

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  1. Inline Check Valve - Back Flow Prevention - John Guest Speedfit Quick Connection 1/4"SCV or 3/8"SCV. Choose the correct size for your tube.  These do not convert tube size.
    Inline Check Valve - Back Flow Prevention - John Guest Speedfit Quick Connection Cosse Either 1/4"SCV or 3/8"SCV Tube Size

    Inline Check Valve - Back Flow Prevention - Safety Check Valve - 1/4" OR 3/8" quick connect one way flow.  Easy to install. 1/4SCV OR 3/8SCV.  Choose the correct size for your tube.  These do not convert tube size.

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    $19.99 As low as $17.99
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  2. John Guest ® ASVPP1LF Angle Stop Water Valve
    John Guest ® ASVPP1LF Angle Stop Water Valve

    John Guest ® ASVPP1LF Angle Stop Water Valve - Makes installation a snap. Very simple to use. PPASV121208W and PPASV121212W

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    $12.99 As low as $10.99
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  3. 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.
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    $9.99
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  4. 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
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    $7.99
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  5. John Guest Check Valve for reverse osmosis membrane housings. #NC2811
    John Guest Check Valve for reverse osmosis membrane housings. #NC2811

    Check valve made for your reverse osmosis membrane housing.  1/4 in. x 1/8 in. NPT elbow from John Guest part number NC2811, which features an integral check valve for R.O membrane housings. This elbow check valve prevents damage to the R.O. membrane due to backflow of the product water line.

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    $12.95
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  6. John Guest 3/8" Stem OD x 1/4" Barb PI251208S-US
    John Guest 3/8" Stem OD x 1/4" Barb PI251208S-US

    John Guest Tube to Hose Stem Connector is convert a john guest pushfit connection, to a barbed hose connection.  #PI251208S-US

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    $2.00
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  7. 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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    $4.99 As low as $3.49
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  8. 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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    $9.99 As low as $7.99
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  9. 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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    $6.99 As low as $4.99
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  10. John Guest ® Tube Cutter - TSNIP
    John Guest ® Tube Cutter - TSNIP
    John Guest ® tube cutter TSNIP - Great for making a perfect cut everytime. Helps prevent leaks by making a square end cut ensuring proper fit and seal in water connecttion fittings. A real must for any professional or discerning home owner.
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    $12.99 As low as $10.99
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  11. John Guest Tube Cutter Replacement Blades - 5 Pack
    John Guest ® Tube Cutter Replacement Blades - 5 Pack
    John Guest ® Tube Cutter Replacement Blades - Easy replacement. Package of 5 Replament Blades.
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    $13.99 As low as $11.66
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  12. 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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    $4.99 As low as $3.99
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  13. 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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    $4.99 As low as $3.99
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  14. 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
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    $4.99 As low as $3.99
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  15. 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
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    $2.79 As low as $1.99
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  16. 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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    $6.99 As low as $5.79
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  17. 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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    $11.99 As low as $9.99
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  18. 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

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    $8.99
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  19. John Guest PI051222S Stem Adapter 3/8" OD Stem X 1/4" MNPT - SOLD IN PAIRS
    John Guest PI051222S Stem Adapter 3/8" OD Stem X 1/4" MNPT - SOLD IN PAIRS
    John Guest PI051222S Stem Adapter 3/8" Stem X 1/4" MNPT - SOLD IN PAIRS
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    $5.99
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  20. JOHN GUEST- PI0812S Plug 3/8'' Tube - 1000
    John Guest PI0812S Plug 3/8" Tube
    John Guest PI0812S Plug 3/8" Tube
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    $3.29
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  21. 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

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    $4.99
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  22. 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
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    $4.99
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  23. 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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  24. 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
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    $4.99
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  25. 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

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    $4.99
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  26. 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
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    $4.99
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  27. 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
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    $4.99
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  28. 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

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    $4.99
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  29. 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

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    $4.99
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  30. 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

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    $4.99
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  31. 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

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    $4.99
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  32. 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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  33. 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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  34. JOHN GUEST- 3/8 SCV Check Valve : 3/8'' Tube X 3/8'' Tube - 1000
    John Guest 3/8SCV Check Valve 3/8" Tube X 3/8" Tube
    John Guest 3/8SCV Check Valve 3/8" Tube X 3/8" Tube
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    $20.99
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  35. 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.
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    $12.99
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  36. 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

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    $10.99
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  37. 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
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    $12.99
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  38. 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

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    $9.99
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  39. 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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    $9.99 As low as $7.99
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  40. JOHN GUEST- PPSV041212W- In-Line Shut-Off Valve 3/8'' - 1000
    John Guest PPSV041212W In-Line Shut-Off Valve 3/8" Tube
    John Guest PPSV041212W In-Line Shut-Off Valve 3/8" Tube X 3/8" Tube
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    $10.99
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  41. 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
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    $12.99
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  42. 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
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    $9.99
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  43. 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

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    $11.99
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  44. JOHN GUEST- Angle-Stop-Valve - 3-8 - ASV121212W / ASVPP2LF - 1000
    John Guest ASVPP2LF Angle Stop Valve 3-8

    John Guest ASVPP2LF Angle Stop Adapter Valve 3/8" Male Comp X 3/8" Male Comp X 3/8" Tube. PPASV121212W

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    $13.99
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  45. JOHN GUEST- PI061208S- Reducer 3/8'' & Stem X 1/4'' Tube- 1000
    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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    $5.99
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  46. JOHN GUEST- PI051223S - Stem Adaptor 3/8'' & 3/8'' NPTF Thread- 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 - SOLD IN PAIRS
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    $5.99
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  47. JOHN GUEST- Reducer PI050822S - Stem Adaptor 1/4'' x 1/4' NPTF Threads - 1000
    John Guest PI050822S Stem Adapter 1/4" Stem X 1/4" MNPT
    John Guest PI050822S Stem Adapter 1/4" Stem X 1/4" MNPT - SOLD IN PAIRS
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    $5.99
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  48. 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

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    $5.99
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  49. 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 3/8" Tube
    John Guest PI301208S Reducing Tee 3/8" Tube X 1/4" Tube X 3/8" Tube
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    $11.49
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  50. 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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    $3.99 As low as $3.39
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Adaptors
Adaptors

John Guest, Sea Tec and JACO Adaptors for Reverse Osmosis RO Pure Water Systems. Low prices and fast shipping online since 1999. Quantity discounts. DIY HELP Guides. Millions sold.

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Check Valves
Check Valves

Replacement Check Valves For Reverse Osmosis Water Filter Systems. Low prices and fast shipping online since 1999. Millions sold. Volume discounts. DIY HELP Guides.

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Drain Saddles
Drain Saddles

Drain Saddle Replacements For Reverse Osmosis Pure Water Systems. Low prices and fast shipping online since 1999. Millions sold. Quantity discounts. DIY HELP Guides.

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Jaco Connectors & Fittings
Jaco Connectors & Fittings

Jaco Connectors & Fittings For RO Poly Tube Connecting Reverse Osmosis and Water Filter Drinking Water Systems. Large selection including John Guest, Jaco, Sea Tech, Parker and others. Low prices and fast shipping since 1999.

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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. Large John Guest tubing inventory, low prices and fast shipping since 1999. Millions sold. Volume discounts. DIY HELP Guides.

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Valves
Valves

Valves For Reverse Osmosis RO And All Pure Water Systems. Large selection and inventory. Low prices and fast shipping online since 1999. Volume discounts. Millions sold. 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.



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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