Log In Log In  |  Checkout   |  41 item(s)
1 x ACT-820-JG Aquatec Pulsation Dampener Accumulator Pressure Tank
1 x 532b, PAE RO Water Storage Pressure Osmosis Tank Container 4G
1 x 756SET, Aquatec Permeate Pump Reverse Osmosis System ERP1000
1 x SV-24AC-14, Solenoid Valve for Aquatec pump only 1/4" 24VAC ESO
1 x KF511UP SUBSTITUTE/Upgrade Faucet CHROME GOLD TRIM CROSS HANDLE
1 x *Discontinued* RD106
1 x ERP1000 Aquatec Permeate Pump Reverse Osmosis RO System USA made
1 x TMR-220V-1A Aquatec TACS234-19 Transformer Power Supply EuroPlug
1 x AQUATEC CDP 8852-2J03-B424 Booster Pump 220V Euro Transformer
1 x PSW-350, Pressure Switch for RO Booster Pump 1/4" TSO
2 x TMR-AQT-68, Transformer Power Supply Aquatec TACS114-19EP for 68
1 x KF612UP, SUBSTITUTE/Upgrade Faucet Oil Rubbed Bronze Fisnish
1 x .K6NTF KoolerMax K6ALK RO shell without tank and faucet
1 x SET68, AQUATEC 6840 AC Pump Set Solenoid ESO Pressure Switch SET
1 x TMR-220V-2A Aquatec TACS234-48 Transformer Power Supply EuroPlug
1 x 7044-K Union Tee Connector Fitting Compression type 1/4"
1 x FPK, High Quality Fitting and Connector 3/8" (Value-Pack)
1 x MK550, Maintenance kit for RO585, RD102, RD106, RO6, K5, K6
1 x Optional: 564 Membrane Filter Housing Wrench Opener
1 x PSW-280 Aquatec Pressure Switch 80 psi shut off 1/4 tubing TSO
1 x 581, Ice Maker Hookup Kit Connect RO water to Fridge Ice Maker
1 x OPTIONAL: 567 Filter Housing Wrench Case Opener WHOLE HOUSE WH
1 x PSW-260 Aquatec Pressure Switch 60 psi shut off 1/4" tubing TSO
1 x UU Clips Pair Standard Filter to Standard Filter, 2" x 2"
1 x UC SHELL, Honeywell UC7000 Empty System Only No Filter
1 x TMR-DC-2412, Transformer Power Supply for #752 Booster Pump
1 x CBV-38, Tank Ball Valve to 3/8 tubing
1 x 201, 1st stage sediment filter (replace every 6-12 months)
1 x PSW-360 Aquatec Pressure Switch 60 psi shut off 3/8" tubing TSO
1 x TMR-DC-1212, Transformer Power Supply for Delivery Demand Pump
1 x CKV0402, Blue color Elbow Check Valve Elbow Type
1 x PSW-340 Aquatec Pressure Switch 40 psi shut off 3/8" tubing TSO
1 x Parts, Ro Water System Installation Parts Bag 1/4"
1 x SW SHELL, Countertop SW1 Empty System Only No Filter
1 x IM60, Ice Maker or RV Water Filter, Inline Typle
1 x RF62, Replacement filter for CT-6000, UC7000, SW-1, and SW-1C
1 x 4044-K qty 2 Male Elbow Fitting Compression type 1/4"
1 x Y3414BR, Garden Hose Y Adapter Shutoff Valve Brass Construction
1 x MK800, Maintenance kit for AR122, AR125, HK120, RD150, RO155
1 x 4064K Male Connector Elbow 3/8 OD Compression Fitting 1/4 NPT

View Cart$1,405.90
Specials Log InCreate Account Checkout  Shopping Cart41 item(s)
1 x ACT-820-JG Aquatec Pulsation Dampener Accumulator Pressure Tank
1 x 532b, PAE RO Water Storage Pressure Osmosis Tank Container 4G
1 x 756SET, Aquatec Permeate Pump Reverse Osmosis System ERP1000
1 x SV-24AC-14, Solenoid Valve for Aquatec pump only 1/4" 24VAC ESO
1 x KF511UP SUBSTITUTE/Upgrade Faucet CHROME GOLD TRIM CROSS HANDLE
1 x *Discontinued* RD106
1 x ERP1000 Aquatec Permeate Pump Reverse Osmosis RO System USA made
1 x TMR-220V-1A Aquatec TACS234-19 Transformer Power Supply EuroPlug
1 x AQUATEC CDP 8852-2J03-B424 Booster Pump 220V Euro Transformer
1 x PSW-350, Pressure Switch for RO Booster Pump 1/4" TSO
2 x TMR-AQT-68, Transformer Power Supply Aquatec TACS114-19EP for 68
1 x KF612UP, SUBSTITUTE/Upgrade Faucet Oil Rubbed Bronze Fisnish
1 x .K6NTF KoolerMax K6ALK RO shell without tank and faucet
1 x SET68, AQUATEC 6840 AC Pump Set Solenoid ESO Pressure Switch SET
1 x TMR-220V-2A Aquatec TACS234-48 Transformer Power Supply EuroPlug
1 x 7044-K Union Tee Connector Fitting Compression type 1/4"
1 x FPK, High Quality Fitting and Connector 3/8" (Value-Pack)
1 x MK550, Maintenance kit for RO585, RD102, RD106, RO6, K5, K6
1 x Optional: 564 Membrane Filter Housing Wrench Opener
1 x PSW-280 Aquatec Pressure Switch 80 psi shut off 1/4 tubing TSO
1 x 581, Ice Maker Hookup Kit Connect RO water to Fridge Ice Maker
1 x OPTIONAL: 567 Filter Housing Wrench Case Opener WHOLE HOUSE WH
1 x PSW-260 Aquatec Pressure Switch 60 psi shut off 1/4" tubing TSO
1 x UU Clips Pair Standard Filter to Standard Filter, 2" x 2"
1 x UC SHELL, Honeywell UC7000 Empty System Only No Filter
1 x TMR-DC-2412, Transformer Power Supply for #752 Booster Pump
1 x CBV-38, Tank Ball Valve to 3/8 tubing
1 x 201, 1st stage sediment filter (replace every 6-12 months)
1 x PSW-360 Aquatec Pressure Switch 60 psi shut off 3/8" tubing TSO
1 x TMR-DC-1212, Transformer Power Supply for Delivery Demand Pump
1 x CKV0402, Blue color Elbow Check Valve Elbow Type
1 x PSW-340 Aquatec Pressure Switch 40 psi shut off 3/8" tubing TSO
1 x Parts, Ro Water System Installation Parts Bag 1/4"
1 x SW SHELL, Countertop SW1 Empty System Only No Filter
1 x IM60, Ice Maker or RV Water Filter, Inline Typle
1 x RF62, Replacement filter for CT-6000, UC7000, SW-1, and SW-1C
1 x 4044-K qty 2 Male Elbow Fitting Compression type 1/4"
1 x Y3414BR, Garden Hose Y Adapter Shutoff Valve Brass Construction
1 x MK800, Maintenance kit for AR122, AR125, HK120, RD150, RO155
1 x 4064K Male Connector Elbow 3/8 OD Compression Fitting 1/4 NPT

View Cart$1,405.90

ARD, Reducer Fitting Straight Tube OD Stem OD [ARD]

$3.50

ARD, Reducer Fitting Straight Tube OD Stem OD



* ARD, Reducer Fitting Straight Tube OD Stem OD

* Please choose size from the selection box below. First number is tubing OD and second number is Stem OD Outside Diameter (Pipe sizes can be confusing even for the experienced user. Pipe size is not the actual outside or inside diameter of the pipe but is the industry accepted designation. If you have any question please email us first.)
* 1/4" Tube OD x 3/8" Stem OD ARD0406
* 3/8" Tube OD x 1/2" Stem OD ARD0607


* Water & foods use: Products are manufactured from safe, non-toxic materials meeting the requirements of the US FDA, ERAS, ANSI/NSF-51,61, and SK Zert. Our products are widely used in water purification, food/beverage, and pneumatic systems.

* Function & Quality: Provides quick and convenient assembly-saving time & expense.

* Collet Design: Our unique oval collet design is superior and more practical, and is an improvement welcomed by our world wide customers in all industries.

* Additional Applications: Beyond water and food use, fittings can be used with air, gases, vacuum, & liquids. All connections can be assembled & disassembled repeatedly. A broad range of sizes covers a broad scope of applications.

* We carry different fittings in variation of sizes: 1/4", 3/8", or 1/2" adapters, connectors, fittings, or valves.  Most are not listed online, to avoid confusion to majority of RO system customers.  

* Send us a message with specification, intended application, and image of your setup or old fitting  to check if we have what you need. 

Available Options:

Size Combination:

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