Log In Log In  |  Checkout   |  57 item(s)
1 x KF612, Elite Series: Oil Rubbed Bronze ORB Drinking Water Faucet
1 x 365, 4th stage TFC 50/65 US membrane filter (replace 2-3 yrs)
1 x 6044-K Tee Fitting Compression Type 1/4"OD 1/4" NPT
1 x SET88 Aquatec 8852 AC Booster pump Solenoid ESO Pressure Switch
1 x DB40, DI Resin Refill Bag for DI210, RD322
1 x DM-2, Inline Dual TDS monitor (meter) for RO DI System DM2
1 x KT-103, Optional Manual Membrane Flush Valve
1 x 4044-K Male Elbow Fitting Compression type 1/4" OD 1/4" NPT
1 x AMTU-0404 Male Tee Union Connector NPT Thread 1/4" Quick Connect
1 x 741-38, Diverter Valve for RO DI Water Systems
1 x 4042-K Male Elbow Fitting Compression type(membrane housing use)
1 x Optional 5th or 6th Stage upgrade inline DI filter(color change)
1 x FK-53, Replacement Filter Pack SED2005 CB2010 for RD322 RO260
3 x Optional: 566 Filter Housing Wrench Opener WaterGeneral System
2 x 350UP, Upgrade Kit TFC50 gal/day (includes US membrane filter)
1 x 3150, 4th stage TFC-150 US membrane filter (every 2-3 yrs)
1 x FM10, STEEL BRACKET SINGLE HOUSING MOUNTING SYSTEM
1 x Micro 1/4 NPT Digital Flow Meter count up total Water Liter LPM
1 x FRQ550, Flow Restrictor 500 to 600ML / min
1 x MK300, Maintenance kit for RO535, RO435, RO545, AR104H
3 x 205 2nd stage solid carbon block filter (replace every 12 month)
1 x PSW-2100 Aquatec Pressure Switch 100 psi shut off 1/4 tubing TSO
1 x Special, Single Stage Housing Bracket Shell Connection Kit
1 x BUNDLE PACK Annual Filter Kit FK4 WaterGeneral 585 106 (4 ITEMS)
2 x Optional 566 Filter Housing Wrench Case Opener KoolerMax System
1 x WT-bac, Water Testing Kit, Bacteria Test
1 x 568,Heavy-Duty Filter Housing Wrench, HoneyWell or FilterCold
1 x FPK, 6 pcs Fitting Pack Union Connector 1/4" quarter inch
1 x MK800, Maintenance kit for AR122, AR125, HK120, RD150, RO155
1 x Conversion Kit, Convert Aquarium to Drinking RO Water System
1 x TMR-220V-2A Aquatec TACS234-48 Transformer Power Supply EuroPlug
1 x Optional: 564 Membrane Filter Housing Wrench Opener
1 x CP-OR35+701 O-RING FOR WATERGENERAL BOTTOM FILTER HOUSING CASING
2 x 201, 1st stage sediment filter (replace every 6-12 months)
1 x 718b Blue Color Tubing 24 feet 1/4" LLDPE PE tube drinking water
1 x FPK, 6 pcs Fitting Pack Union Connector 3/8 x 1/4 inch
1 x SC208, Specialty Filter Iron Lead and Heavy Metal Removal Filter
1 x 2nd stage C10 carbon block filter (replace every 6-12 months)
1 x 773, AC Booster Pump Assembly Large 150-200GPD RO systems SET
1 x BUNDLE PACK ANNUAL FILTER KIT FK3 WaterGeneral 102 150 (3 ITEMS)
1 x 4th stage TFC 75/85 US membrane filter (every 2-3 yrs) M75
1 x 6044-combo Compression Type Fitting Elbow and Tee fitting
1 x CDP6800T110V, AQUATEC Booster Pump Transformer 6840-2J03-B224
1 x TMR-AQT-2A, Transformer Power Supply Aquatec TACS114-48 for 8800
1 x MK200, Maintenance kit for Rotek Systems RCT-103 and RTF-265
1 x .RD322 Aquarium 260-300 GPD REVERSE OSMOSIS RO+DI WATER SYSTEM
1 x *Discontinued* RD102
1 x FHP2012, 20" long Filter Cartridge Casing Housing RO260 RD322
1 x Wrench 2 pcs 566 Standard Filter Housing Opener Double Better
1 x Optional 225UP 5th stage Inline Alkaline upgrade(includes media)

View Cart$2,003.67
Specials Log InCreate Account Checkout  Shopping Cart57 item(s)
1 x KF612, Elite Series: Oil Rubbed Bronze ORB Drinking Water Faucet
1 x 365, 4th stage TFC 50/65 US membrane filter (replace 2-3 yrs)
1 x 6044-K Tee Fitting Compression Type 1/4"OD 1/4" NPT
1 x SET88 Aquatec 8852 AC Booster pump Solenoid ESO Pressure Switch
1 x DB40, DI Resin Refill Bag for DI210, RD322
1 x DM-2, Inline Dual TDS monitor (meter) for RO DI System DM2
1 x KT-103, Optional Manual Membrane Flush Valve
1 x 4044-K Male Elbow Fitting Compression type 1/4" OD 1/4" NPT
1 x AMTU-0404 Male Tee Union Connector NPT Thread 1/4" Quick Connect
1 x 741-38, Diverter Valve for RO DI Water Systems
1 x 4042-K Male Elbow Fitting Compression type(membrane housing use)
1 x Optional 5th or 6th Stage upgrade inline DI filter(color change)
1 x FK-53, Replacement Filter Pack SED2005 CB2010 for RD322 RO260
3 x Optional: 566 Filter Housing Wrench Opener WaterGeneral System
2 x 350UP, Upgrade Kit TFC50 gal/day (includes US membrane filter)
1 x 3150, 4th stage TFC-150 US membrane filter (every 2-3 yrs)
1 x FM10, STEEL BRACKET SINGLE HOUSING MOUNTING SYSTEM
1 x Micro 1/4 NPT Digital Flow Meter count up total Water Liter LPM
1 x FRQ550, Flow Restrictor 500 to 600ML / min
1 x MK300, Maintenance kit for RO535, RO435, RO545, AR104H
3 x 205 2nd stage solid carbon block filter (replace every 12 month)
1 x PSW-2100 Aquatec Pressure Switch 100 psi shut off 1/4 tubing TSO
1 x Special, Single Stage Housing Bracket Shell Connection Kit
1 x BUNDLE PACK Annual Filter Kit FK4 WaterGeneral 585 106 (4 ITEMS)
2 x Optional 566 Filter Housing Wrench Case Opener KoolerMax System
1 x WT-bac, Water Testing Kit, Bacteria Test
1 x 568,Heavy-Duty Filter Housing Wrench, HoneyWell or FilterCold
1 x FPK, 6 pcs Fitting Pack Union Connector 1/4" quarter inch
1 x MK800, Maintenance kit for AR122, AR125, HK120, RD150, RO155
1 x Conversion Kit, Convert Aquarium to Drinking RO Water System
1 x TMR-220V-2A Aquatec TACS234-48 Transformer Power Supply EuroPlug
1 x Optional: 564 Membrane Filter Housing Wrench Opener
1 x CP-OR35+701 O-RING FOR WATERGENERAL BOTTOM FILTER HOUSING CASING
2 x 201, 1st stage sediment filter (replace every 6-12 months)
1 x 718b Blue Color Tubing 24 feet 1/4" LLDPE PE tube drinking water
1 x FPK, 6 pcs Fitting Pack Union Connector 3/8 x 1/4 inch
1 x SC208, Specialty Filter Iron Lead and Heavy Metal Removal Filter
1 x 2nd stage C10 carbon block filter (replace every 6-12 months)
1 x 773, AC Booster Pump Assembly Large 150-200GPD RO systems SET
1 x BUNDLE PACK ANNUAL FILTER KIT FK3 WaterGeneral 102 150 (3 ITEMS)
1 x 4th stage TFC 75/85 US membrane filter (every 2-3 yrs) M75
1 x 6044-combo Compression Type Fitting Elbow and Tee fitting
1 x CDP6800T110V, AQUATEC Booster Pump Transformer 6840-2J03-B224
1 x TMR-AQT-2A, Transformer Power Supply Aquatec TACS114-48 for 8800
1 x MK200, Maintenance kit for Rotek Systems RCT-103 and RTF-265
1 x .RD322 Aquarium 260-300 GPD REVERSE OSMOSIS RO+DI WATER SYSTEM
1 x *Discontinued* RD102
1 x FHP2012, 20" long Filter Cartridge Casing Housing RO260 RD322
1 x Wrench 2 pcs 566 Standard Filter Housing Opener Double Better
1 x Optional 225UP 5th stage Inline Alkaline upgrade(includes media)

View Cart$2,003.67

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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