John Guest reverse osmosis & pure water fittings, connectors and adaptors

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


John Guest reverse osmosis & pure water fittings and adaptors

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John Guest Super Speedfit Quick Connector - Male - Straight

John Guest Super Speedfit Quick Connector - Male - Straight

Price Each: $4.99

Tube - Thread Size

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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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John Guest Super Speedfit Quick Connector - Male - Elbow


John Guest Super Speedfit Quick Connector - Male - Elbow


Price Each: $4.99

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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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John Guest faucet adaptor for 3/8 poly tube


John Guest faucet adaptor with quick connector for poly tube


Price Each: $4.99

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John Guest faucet adaptor 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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John Guest Straight Connector


John Guest Straight Union Connector


Price Each: $6.99

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John Guest Straight Union Connector - Connects tube to tube using SpeedFit Quick Connectors. PI201208S , PI0408S , PI0412S

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John Guest stem adaptor - 3/8 tube to 1/4 quick connect fitting


John Guest Reducer - 1/4" tube to 3/8" stem (pair) PI061208S


Price Each: $5.99

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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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John Guest Speedfit Plug In Elbow Quick Connector For Water Filtration Systems. PI220808S, PI221208S, PI221212S, PI221616S
 


Price Each: $3.99

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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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John Guest inline shut off valve


John Guest inline shut off valve


Price Each: $9.99

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John Guest inline shut off valve - Easy to install push in quick connectors. PPSV040808W and PPSV041212W

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John Guest Speedfit Tank Valve For Reverse Osmosis Systems


John Guest Speedfit Tank Valve For Reverse Osmosis Systems


Price Each: $11.99

Poly Tube OD x FNPT(tank)

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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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John Guest Angle Stop Valve


John Guest Angle Stop Valve


Price Each: $12.99

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

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John Guest Tee Connector - Quick Connectors


John Guest Tee Connector - Quick Connectors


Price Each: $9.99

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Stem Adaptor - Sold In Pairs

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John Guest Tee Connector - Quick Connectors - All equal size connections. 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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Inline Check Valve - Back Flow Prevention


Inline Check Valve - Back Flow Prevention


Price Each: $24.99
Sale Price: $19.99
Savings: $5.00

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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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John Guest Speedfit Plug Quick Connector.  PI0808S, PI0812S, PI0816S.
 

Price Each: $2.79

Stem Size

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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

John Guest Poly Tubing For Pure Water


John Guest Poly Tubing For Pure Drinking Water Systems


Price Each: $0.40
Sale Price: $0.27
Savings: $0.13

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John Guest Poly Tubing For Pure Drinking Water Systems - 1/4", 3/8" and 1/2" O.D. (Outer Dimension) High Grade Drinking Water Tubing. Speedfit quick connector compatible. Choose the 3/8" O.D. For Use With Optional Drain Saddle For Air Gap Faucet. Sold by the foot. Order 20 to get 20 feet.

John Guest tube cutter


John Guest tube cutter - TSNIP


Price Each: $14.99
Sale Price: $12.99
Savings: $2.00

Extra Blades

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John Guest tube cutter TSNIP - Great for making a perfect cut everytime. Helps prevent leaks by making a suare 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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John Guest Tube Cutter Replacement Blades


John Guest Tube Cutter Replacement Blades - 5 Pack


Price Each: $11.99

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John Guest Tube Cutter Replacement Blades - Easy replacement. Package of 5 Replament Blades.

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John Guest Locking Clips


John Guest Locking Clips


Price Each: $4.99

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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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Be sure to check our Parts Department for important parts such as TDS Testers, Replacement Tanks, O-rings , Housing Wrenches and more parts for your reverse osmosis pure water system.

* John Guest is the registered trademark of John Guest, the manufacturer of John Guest brand water treatment equipment.  The replacement filters and membranes listed above are not manufactured or endorsed by John Guest.  Rather, these filters and membranes are manufactured by other companies.  While these filters and membranes are compatible for use in John Guest brand water treatment equipment, we make no representation as to whether using these filters and membranes is consistent with the warranty and specifications applicable to John Guest equipment.


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Replacement water filters and reverse osmosis membranes