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1 x Value Pack- Entire 3 Years of Replacement Filters Bundle RD106
1 x 709C, Disc Shape Auto Shut Off Valve 4-way Four Way Valve
1 x *Discontinued* RO585
4 x Optional: 564 Membrane Filter Housing Wrench Opener
4 x Wrench 2 pcs 566 Standard Filter Housing Opener Double Better
1 x KF320UP, SUBSTITUTE/Upgrade Faucet BRUSHED NICKEL STAINLESS STEE
1 x 565, Digital Pressure Gauge Tester Monitor
1 x 752, DC Booster Pump w/ Transformer
1 x SET8855 Aquatec 5853 Booster Pump Assembly for Aeroponics System
1 x bulk205, Carbon Block Filter
1 x CDP6800T110V, AQUATEC Booster Pump Transformer 6840-2J03-B224
1 x SC725, Specialty Filter Chloramines / Hydrogen Sulfide Removal
1 x Value Pack- Entire 3 Years of Replacement Filters Bundle HK120
3 x Optional: 566 Filter Housing Wrench Opener WaterGeneral System
2 x 532b, PAE RO Water Storage Pressure Osmosis Tank Container 4G
2 x PSW-340 Aquatec Pressure Switch 40 psi shut off 3/8" tubing TSO
1 x Special Filter Kit Koolermax dealer distribution kit
1 x CPR-150G, Pressure Regulator with Pressure Gauge (0-125 psi)
1 x 745, AFAN0409 Female Garden Hose / Laundry Hose Adapter
1 x KT-103, Optional Manual Membrane Flush Valve
1 x 532bpg, PAE RO water pressure tank blue bladder gauge valve 4G
1 x 6044-K Tee Fitting Compression Type 1/4"OD 1/4" NPT
1 x NM-5102, HONEYWELL COUNTERTOP WATER FILTER *DISCONTINUED* SW1
1 x *Discontinued* RD102
1 x TMR-DC-1212, Transformer Power Supply for Delivery Demand Pump
1 x SV-24AC-14, Solenoid Valve for Aquatec pump only 1/4" 24VAC ESO
1 x 673, Replacement UV Lamp Light for 602 (6 Watts)
2 x 225UP, 5th stage Inline Alkaline upgrade (includes media)
1 x FPK11, High Quality Fitting and Connector 1/4" (Value-Pack)
1 x KF511UP SUBSTITUTE/Upgrade Faucet CHROME GOLD TRIM CROSS HANDLE
1 x UC SHELL, Honeywell UC7000 Empty System Only No Filter
1 x WSACF-150T, Whole House Water Treatment ACF-150T
1 x .RO260 Aquarium 300G REVERSE OSMOSIS AEROPONICS HYDROPONICS RO
1 x SC208, Specialty Filter Iron Lead and Heavy Metal Removal Filter
1 x Value Pack- Entire 3 Years of Replacement Filters Bundle RO155
1 x 204, 2nd stage GAC filter (replace every 6-12 months)
2 x Conversion Kit, Convert Aquarium to Drinking RO Water System
1 x FPK, 6 pcs Fitting Pack Union Connector 1/4" quarter inch
1 x MK8002, Maintenance kit for double membrane system RD322 RO260
2 x 701, FH1014 Filter Housing Chamber Casing White Color 1/4 FPT
1 x 201, 1st stage sediment filter (replace every 6-12 months)
1 x WH-20, Whole House Water Treatment Carbon Block Filter System Bi
1 x FM-8000T, DigiFlow Digital Water Flow Meter Rate Count Down
1 x WH-25, Whole House Water Treatment Sediment Filter System 20" Bi
2 x BUNDLE PACK ANNUAL FILTER KIT FK3 WaterGeneral 102 150 (3 ITEMS)
2 x 1.SED2005, 1st stage sediment filter 20" inch for RD322 RO260
1 x RF62, Replacement filter for CT-6000, UC7000, SW-1, and SW-1C
1 x 1st stage SF05 sediment filter (replace every 6-12 months)
1 x FM214G 1/4" NPT Digital Flow Meter count up total Water Gallons
1 x 335UP, Upgrade Kit TFC 35 gal/day (includes US membrane filter)
1 x KF612UP, SUBSTITUTE/Upgrade Faucet Oil Rubbed Bronze Fisnish
1 x 4064K Male Connector Elbow 3/8 OD Compression Fitting 1/4 NPT
2 x 205, 3rd stage solid carbon block filter (replace every 12month)
1 x FM-6710M-88 1" Digital Flow Meter count up Total GPM 56" cable
1 x TMR-25A, 2.5 AMP Transformer Power Supply Ballast for 8800 5853
1 x PSW-280 Aquatec Pressure Switch 80 psi shut off 1/4 tubing TSO
1 x 701C, FHC1014 Filter Housing Chamber Casing Clear Color 1/4 FPT
2 x OPTIONAL: 567 Filter Housing Wrench Case Opener WHOLE HOUSE WH
1 x SC435, Specialty Filter Arsenic / Fluoride Removal Filter
1 x SV-24DC-14, Solenoid Valve ESO 1/4" plastic, 24V DC
1 x KF355UP, SUBSTITUTE/Upgrade to Antique Brushed Brass Iron Finish
1 x 4th stage TFC150 US membrane filter (every 2-3 yrs)M150 P/N3150
1 x PSW-350, Pressure Switch for RO Booster Pump 1/4" TSO
1 x Optional 5th or 6th Stage upgrade inline DI filter(color change)
1 x CP-OR35+701 O-RING FOR WATERGENERAL BOTTOM FILTER HOUSING CASING
1 x WS-150M, Whole House Water Softener
1 x CDP8800, AQUATEC CDP8852-2J03-B424 Booster Pump Only Fitting
1 x 202,1 MICRON Sediment filter (replace every 6-12 month) SED1001
1 x .K6150P, KoolerMax 150GPD 6 Stage RO System w/ Booster Pump
1 x 6044-combo Compression Type Fitting Elbow and Tee fitting
1 x 3150, 5th stage TFC-150 US membrane filter (every 2-3 years)
1 x 741-14, Diverter Valve for Countertop Water Units
1 x 213, 5th or 6th stage inline carbon filter (replace in 12 mons)
1 x .AR125NTF KoolerMax AR125 RO System Shell without tank & faucet
1 x 532w, PAE RO Storage Pressure Osmosis Water Tank Container 4G
1 x HK120-P-220V KoolerMax Aeroponics Hydroponics RO + Booster Pump
1 x NM-5103, HONEYWELL COUNTERTOP WATER FILTER *DISCONTINUED* SW1
1 x Aeroponics HighPressure Booster Pump Aquatec CDP5853 Transformer
1 x 285, Big Blue SED2005BB 20" Sediment filter WH25 WH250 WH2201
1 x HK120-P-TK for USA 110V / 60Hz
1 x Panel 1/4 Digital Flow Meter count up total Gallons GPM 56"cable
1 x 602, UV Ultra Violet Sterilization Light Bulb ystem (6 watts)
1 x B2012, 20" Long Slim Filter Cartridge Housing RO260 RD322
1 x 213, 5th stage inline carbon postfilter (replace every 12months)

View Cart$10,606.12
Specials Log InCreate Account Checkout  Shopping Cart101 item(s)
1 x Value Pack- Entire 3 Years of Replacement Filters Bundle RD106
1 x 709C, Disc Shape Auto Shut Off Valve 4-way Four Way Valve
1 x *Discontinued* RO585
4 x Optional: 564 Membrane Filter Housing Wrench Opener
4 x Wrench 2 pcs 566 Standard Filter Housing Opener Double Better
1 x KF320UP, SUBSTITUTE/Upgrade Faucet BRUSHED NICKEL STAINLESS STEE
1 x 565, Digital Pressure Gauge Tester Monitor
1 x 752, DC Booster Pump w/ Transformer
1 x SET8855 Aquatec 5853 Booster Pump Assembly for Aeroponics System
1 x bulk205, Carbon Block Filter
1 x CDP6800T110V, AQUATEC Booster Pump Transformer 6840-2J03-B224
1 x SC725, Specialty Filter Chloramines / Hydrogen Sulfide Removal
1 x Value Pack- Entire 3 Years of Replacement Filters Bundle HK120
3 x Optional: 566 Filter Housing Wrench Opener WaterGeneral System
2 x 532b, PAE RO Water Storage Pressure Osmosis Tank Container 4G
2 x PSW-340 Aquatec Pressure Switch 40 psi shut off 3/8" tubing TSO
1 x Special Filter Kit Koolermax dealer distribution kit
1 x CPR-150G, Pressure Regulator with Pressure Gauge (0-125 psi)
1 x 745, AFAN0409 Female Garden Hose / Laundry Hose Adapter
1 x KT-103, Optional Manual Membrane Flush Valve
1 x 532bpg, PAE RO water pressure tank blue bladder gauge valve 4G
1 x 6044-K Tee Fitting Compression Type 1/4"OD 1/4" NPT
1 x NM-5102, HONEYWELL COUNTERTOP WATER FILTER *DISCONTINUED* SW1
1 x *Discontinued* RD102
1 x TMR-DC-1212, Transformer Power Supply for Delivery Demand Pump
1 x SV-24AC-14, Solenoid Valve for Aquatec pump only 1/4" 24VAC ESO
1 x 673, Replacement UV Lamp Light for 602 (6 Watts)
2 x 225UP, 5th stage Inline Alkaline upgrade (includes media)
1 x FPK11, High Quality Fitting and Connector 1/4" (Value-Pack)
1 x KF511UP SUBSTITUTE/Upgrade Faucet CHROME GOLD TRIM CROSS HANDLE
1 x UC SHELL, Honeywell UC7000 Empty System Only No Filter
1 x WSACF-150T, Whole House Water Treatment ACF-150T
1 x .RO260 Aquarium 300G REVERSE OSMOSIS AEROPONICS HYDROPONICS RO
1 x SC208, Specialty Filter Iron Lead and Heavy Metal Removal Filter
1 x Value Pack- Entire 3 Years of Replacement Filters Bundle RO155
1 x 204, 2nd stage GAC filter (replace every 6-12 months)
2 x Conversion Kit, Convert Aquarium to Drinking RO Water System
1 x FPK, 6 pcs Fitting Pack Union Connector 1/4" quarter inch
1 x MK8002, Maintenance kit for double membrane system RD322 RO260
2 x 701, FH1014 Filter Housing Chamber Casing White Color 1/4 FPT
1 x 201, 1st stage sediment filter (replace every 6-12 months)
1 x WH-20, Whole House Water Treatment Carbon Block Filter System Bi
1 x FM-8000T, DigiFlow Digital Water Flow Meter Rate Count Down
1 x WH-25, Whole House Water Treatment Sediment Filter System 20" Bi
2 x BUNDLE PACK ANNUAL FILTER KIT FK3 WaterGeneral 102 150 (3 ITEMS)
2 x 1.SED2005, 1st stage sediment filter 20" inch for RD322 RO260
1 x RF62, Replacement filter for CT-6000, UC7000, SW-1, and SW-1C
1 x 1st stage SF05 sediment filter (replace every 6-12 months)
1 x FM214G 1/4" NPT Digital Flow Meter count up total Water Gallons
1 x 335UP, Upgrade Kit TFC 35 gal/day (includes US membrane filter)
1 x KF612UP, SUBSTITUTE/Upgrade Faucet Oil Rubbed Bronze Fisnish
1 x 4064K Male Connector Elbow 3/8 OD Compression Fitting 1/4 NPT
2 x 205, 3rd stage solid carbon block filter (replace every 12month)
1 x FM-6710M-88 1" Digital Flow Meter count up Total GPM 56" cable
1 x TMR-25A, 2.5 AMP Transformer Power Supply Ballast for 8800 5853
1 x PSW-280 Aquatec Pressure Switch 80 psi shut off 1/4 tubing TSO
1 x 701C, FHC1014 Filter Housing Chamber Casing Clear Color 1/4 FPT
2 x OPTIONAL: 567 Filter Housing Wrench Case Opener WHOLE HOUSE WH
1 x SC435, Specialty Filter Arsenic / Fluoride Removal Filter
1 x SV-24DC-14, Solenoid Valve ESO 1/4" plastic, 24V DC
1 x KF355UP, SUBSTITUTE/Upgrade to Antique Brushed Brass Iron Finish
1 x 4th stage TFC150 US membrane filter (every 2-3 yrs)M150 P/N3150
1 x PSW-350, Pressure Switch for RO Booster Pump 1/4" TSO
1 x Optional 5th or 6th Stage upgrade inline DI filter(color change)
1 x CP-OR35+701 O-RING FOR WATERGENERAL BOTTOM FILTER HOUSING CASING
1 x WS-150M, Whole House Water Softener
1 x CDP8800, AQUATEC CDP8852-2J03-B424 Booster Pump Only Fitting
1 x 202,1 MICRON Sediment filter (replace every 6-12 month) SED1001
1 x .K6150P, KoolerMax 150GPD 6 Stage RO System w/ Booster Pump
1 x 6044-combo Compression Type Fitting Elbow and Tee fitting
1 x 3150, 5th stage TFC-150 US membrane filter (every 2-3 years)
1 x 741-14, Diverter Valve for Countertop Water Units
1 x 213, 5th or 6th stage inline carbon filter (replace in 12 mons)
1 x .AR125NTF KoolerMax AR125 RO System Shell without tank & faucet
1 x 532w, PAE RO Storage Pressure Osmosis Water Tank Container 4G
1 x HK120-P-220V KoolerMax Aeroponics Hydroponics RO + Booster Pump
1 x NM-5103, HONEYWELL COUNTERTOP WATER FILTER *DISCONTINUED* SW1
1 x Aeroponics HighPressure Booster Pump Aquatec CDP5853 Transformer
1 x 285, Big Blue SED2005BB 20" Sediment filter WH25 WH250 WH2201
1 x HK120-P-TK for USA 110V / 60Hz
1 x Panel 1/4 Digital Flow Meter count up total Gallons GPM 56"cable
1 x 602, UV Ultra Violet Sterilization Light Bulb ystem (6 watts)
1 x B2012, 20" Long Slim Filter Cartridge Housing RO260 RD322
1 x 213, 5th stage inline carbon postfilter (replace every 12months)

View Cart$10,606.12

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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