Log In Log In  |  Checkout   |  107 item(s)
1 x SET88 Aquatec 8852 AC Booster pump Solenoid ESO Pressure Switch
1 x .K6A KoolerMax 75GPD 6STAGE Alkaline pH REVERSE OSMOSIS RO FILTE
1 x Value Pack- Entire 3 Years of Replacement Filters Bundle RD150
2 x KM701C, Special Koolermax Filter Housing Canister Casing 1/4 FPT
1 x FK-BB20M3, Special Big Blue Filter Pack Bundle for WH350 WH-350
1 x bulk201, Sediment Filter
1 x HK120 KoolerMax Aeroponics Hydroponics 150G RO Filtration System
1 x DB40, DI Resin Refill Bag for DI210, RD322
1 x O-RING RINGS FOR WH20 WHOLE HOUSE SYSTEM HOUSING BIG BLUE 20"
1 x WH1134 Whole House Restaurant Filter System Sediment Carbon Big
1 x HK120-P-220V KoolerMax Aeroponics Hydroponics RO + Booster Pump
1 x SVkit, Pump Shutoff Switch Kit for Aquatec Booster Pumps ESO TSO
1 x SV-24AC-14, Solenoid Valve for Aquatec pump only 1/4" 24VAC ESO
2 x SC445, Specialty Filter SPECIAL ALKALINE FILTER Specialty Filter
1 x 205, 3rd stage solid carbon block filter (replace every 12 month
1 x Value Pack- Entire 3 Years of Replacement Filters Bundle RD102
3 x Optional: 564 Membrane Filter Housing Wrench Opener
1 x CBV-38, Tank Ball Valve to 3/8 tubing
1 x Wrench 2 pcs 566 Standard Filter Housing Opener Double Better
1 x Value Pack- Entire 3 Years of Replacement Filters Bundle RO585
2 x KM701, Special Koolermax Filter Housing Canister Casing 1/4 FPT
1 x SV-110AC-14, Solenoid Valve 1/4" plastic 110VAC ESO
1 x 385, 4th stage TFC 75/85 US membrane filter (every 2-3 yrs)
1 x TMR-220V-1A Aquatec TACS234-19 Transformer Power Supply EuroPlug
1 x SC725, Specialty Filter Chloramines / Hydrogen Sulfide Removal
2 x Value Pack- Entire 3 Years of Replacement Filters Bundle AR104H
3 x 3150, 4th stage TFC-150 US membrane filter (every 2-3 yrs)
1 x Optional 566 Filter Housing Wrench Case Opener KoolerMax System
3 x 532b, PAE RO Water Storage Pressure Osmosis Tank Container 4G
1 x Value Pack- Entire 3 Years of Replacement Filters Bundle K5150P
1 x 215, 5th or 6th Stage Refillable inline DI filter (color change)
1 x SV-24AC-38, KSD Solenoid Valve ESO 3/8" brass, 24V AC
2 x 4th stage TFC 75/85 US membrane filter (every 2-3 yrs) M75
1 x 204, 2nd stage GAC filter (replace every 6-12 months)
1 x 3150, 5th stage TFC-150 US membrane filter (every 2-3 years)
1 x Parts, Ro Water System Installation Parts Bag 1/4"
1 x SC209, Specialty Filter Nitrate Removal Filter
1 x Value Pack- Entire 3 Years of Replacement Filters Bundle RD322
2 x 3.CB2010, 3rd stage carbon block filter 20" inch for RD322 RO260
1 x Value Pack- Entire 3 Years of Replacement Filters Bundle RO260
1 x *Discontinued* RO585A
1 x Optional 225UP 5th stage Inline Alkaline upgrade(includes media)
2 x Special, Single Stage Housing Bracket Shell Connection Kit
1 x 4th stage Optional Refill bag #818 DI Resin Refill Bag
1 x bulk818, DI resin refill bags Di-Ionization media
1 x FPK, 6 pcs Fitting Pack Union Connector 1/2 x 3/8 inch
1 x DM-1, Inline Dual TDS monitor (meter) for RO DI System DM1
1 x 399, 4th stage TFC-100 US membrane filter (every 2-3 yrs)
1 x SV-24DC-38-Brass KSD Solenoid Valve 3/8" brass 24V DC ESO
1 x 6044-combo Compression Type Fitting Elbow and Tee fitting
1 x TMR-AQT-2A, Transformer Power Supply Aquatec TACS114-48 for 8800
1 x DI210, Heavy-duty DI system for Aquarium and Reef
1 x 225UP, 5th stage Inline Alkaline upgrade (includes media)
1 x KF612UP, SUBSTITUTE/Upgrade Faucet Oil Rubbed Bronze Fisnish
1 x SET8855 Aquatec 5853 Booster Pump Assembly for Aeroponics System
1 x .RO260 Aquarium 300G REVERSE OSMOSIS AEROPONICS HYDROPONICS RO
1 x 532w, PAE RO Storage Pressure Osmosis Water Tank Container 4G
1 x TMR-DC-2412, Transformer Power Supply for #752 Booster Pump
1 x .AR125 Dual Outputs Aquarium & Home Drinking RO Filter System
1 x Conversion Kit, Convert Aquarium to Drinking RO Water System
1 x bulk213, Inline Carbon Filter
1 x FM-8000T, DigiFlow Digital Water Flow Meter Rate Count Down
1 x SC207, Specialty Filter Refillable Color Changing DI Filter for
1 x FPK, 6 pcs Fitting Pack Union Connector 3/8 x 1/4 inch
1 x WH-250, Whole House Water Treatment Sediment Carbon Filter Syste
1 x Bundle Filter Annual set KPAK-104 Sediment Carbo Block DI Resin
1 x 2nd stage C10 carbon block filter (replace every 6-12 months)
1 x B2010, 20" Big Blue Filter Housing Cartridge WH20 WH25 WH250
1 x 752set, DC Booster Pump Transformer Solenoid Pressure Switch All
1 x *Discontinued* RD106
1 x 3rd stage C10 carbon block filter (replace every 6-12 months)
1 x 205, 3rd stage solid carbon block filter (replace every 12month)
1 x TMR-25A, 2.5 AMP Transformer Power Supply Ballast for 8800 5853
1 x 1070, PAE LARGE RO Storage Pressure Tank 14 GALLON 14G
1 x MK8002, Maintenance kit for double membrane system RD322 RO260
1 x FV-14, Bobby Float Valve Side Mount RM292-12-N NSF USA
1 x 7044-K Union Tee Connector Fitting Compression type 1/4"
1 x 701C, FHC1014 Filter Housing Chamber Casing Clear Color 1/4 FPT
1 x 759, Aquatec Demand Delivery Pump 5853-7E12-J524 Commercial 1.7G
1 x CKV0402, Blue color Elbow Check Valve Elbow Type
1 x 4044-K Male Elbow Fitting Compression type 1/4" OD 1/4" NPT
1 x 752, DC Booster Pump w/ Transformer
3 x Optional: 566 Filter Housing Wrench Opener WaterGeneral System
1 x NM-5001C, HONEYWELL COUNTERTOP WATER FILTER *DISCONTINUED* SW1
1 x *Discontinued* RO585NTF
1 x 532wpg, PAE RO water pressure white tank bladder gauge valve 4G
1 x Value Pack- Entire 3 Years of Replacement Filters Bundle AR122
1 x MK300, Maintenance kit for RO535, RO435, RO545, AR104H
1 x 818, DI Resin Refill Bag 16oz (good for up to three refills)
1 x Value Pack- Entire 3 Years of Replacement Filters Bundle K5
1 x KF320UP, SUBSTITUTE/Upgrade Faucet BRUSHED NICKEL STAINLESS STEE
1 x BUNDLE PACK ANNUAL FILTER KIT FK3 WaterGeneral 102 150 (3 ITEMS)

View Cart$7,775.86
Specials Log InCreate Account Checkout  Shopping Cart107 item(s)
1 x SET88 Aquatec 8852 AC Booster pump Solenoid ESO Pressure Switch
1 x .K6A KoolerMax 75GPD 6STAGE Alkaline pH REVERSE OSMOSIS RO FILTE
1 x Value Pack- Entire 3 Years of Replacement Filters Bundle RD150
2 x KM701C, Special Koolermax Filter Housing Canister Casing 1/4 FPT
1 x FK-BB20M3, Special Big Blue Filter Pack Bundle for WH350 WH-350
1 x bulk201, Sediment Filter
1 x HK120 KoolerMax Aeroponics Hydroponics 150G RO Filtration System
1 x DB40, DI Resin Refill Bag for DI210, RD322
1 x O-RING RINGS FOR WH20 WHOLE HOUSE SYSTEM HOUSING BIG BLUE 20"
1 x WH1134 Whole House Restaurant Filter System Sediment Carbon Big
1 x HK120-P-220V KoolerMax Aeroponics Hydroponics RO + Booster Pump
1 x SVkit, Pump Shutoff Switch Kit for Aquatec Booster Pumps ESO TSO
1 x SV-24AC-14, Solenoid Valve for Aquatec pump only 1/4" 24VAC ESO
2 x SC445, Specialty Filter SPECIAL ALKALINE FILTER Specialty Filter
1 x 205, 3rd stage solid carbon block filter (replace every 12 month
1 x Value Pack- Entire 3 Years of Replacement Filters Bundle RD102
3 x Optional: 564 Membrane Filter Housing Wrench Opener
1 x CBV-38, Tank Ball Valve to 3/8 tubing
1 x Wrench 2 pcs 566 Standard Filter Housing Opener Double Better
1 x Value Pack- Entire 3 Years of Replacement Filters Bundle RO585
2 x KM701, Special Koolermax Filter Housing Canister Casing 1/4 FPT
1 x SV-110AC-14, Solenoid Valve 1/4" plastic 110VAC ESO
1 x 385, 4th stage TFC 75/85 US membrane filter (every 2-3 yrs)
1 x TMR-220V-1A Aquatec TACS234-19 Transformer Power Supply EuroPlug
1 x SC725, Specialty Filter Chloramines / Hydrogen Sulfide Removal
2 x Value Pack- Entire 3 Years of Replacement Filters Bundle AR104H
3 x 3150, 4th stage TFC-150 US membrane filter (every 2-3 yrs)
1 x Optional 566 Filter Housing Wrench Case Opener KoolerMax System
3 x 532b, PAE RO Water Storage Pressure Osmosis Tank Container 4G
1 x Value Pack- Entire 3 Years of Replacement Filters Bundle K5150P
1 x 215, 5th or 6th Stage Refillable inline DI filter (color change)
1 x SV-24AC-38, KSD Solenoid Valve ESO 3/8" brass, 24V AC
2 x 4th stage TFC 75/85 US membrane filter (every 2-3 yrs) M75
1 x 204, 2nd stage GAC filter (replace every 6-12 months)
1 x 3150, 5th stage TFC-150 US membrane filter (every 2-3 years)
1 x Parts, Ro Water System Installation Parts Bag 1/4"
1 x SC209, Specialty Filter Nitrate Removal Filter
1 x Value Pack- Entire 3 Years of Replacement Filters Bundle RD322
2 x 3.CB2010, 3rd stage carbon block filter 20" inch for RD322 RO260
1 x Value Pack- Entire 3 Years of Replacement Filters Bundle RO260
1 x *Discontinued* RO585A
1 x Optional 225UP 5th stage Inline Alkaline upgrade(includes media)
2 x Special, Single Stage Housing Bracket Shell Connection Kit
1 x 4th stage Optional Refill bag #818 DI Resin Refill Bag
1 x bulk818, DI resin refill bags Di-Ionization media
1 x FPK, 6 pcs Fitting Pack Union Connector 1/2 x 3/8 inch
1 x DM-1, Inline Dual TDS monitor (meter) for RO DI System DM1
1 x 399, 4th stage TFC-100 US membrane filter (every 2-3 yrs)
1 x SV-24DC-38-Brass KSD Solenoid Valve 3/8" brass 24V DC ESO
1 x 6044-combo Compression Type Fitting Elbow and Tee fitting
1 x TMR-AQT-2A, Transformer Power Supply Aquatec TACS114-48 for 8800
1 x DI210, Heavy-duty DI system for Aquarium and Reef
1 x 225UP, 5th stage Inline Alkaline upgrade (includes media)
1 x KF612UP, SUBSTITUTE/Upgrade Faucet Oil Rubbed Bronze Fisnish
1 x SET8855 Aquatec 5853 Booster Pump Assembly for Aeroponics System
1 x .RO260 Aquarium 300G REVERSE OSMOSIS AEROPONICS HYDROPONICS RO
1 x 532w, PAE RO Storage Pressure Osmosis Water Tank Container 4G
1 x TMR-DC-2412, Transformer Power Supply for #752 Booster Pump
1 x .AR125 Dual Outputs Aquarium & Home Drinking RO Filter System
1 x Conversion Kit, Convert Aquarium to Drinking RO Water System
1 x bulk213, Inline Carbon Filter
1 x FM-8000T, DigiFlow Digital Water Flow Meter Rate Count Down
1 x SC207, Specialty Filter Refillable Color Changing DI Filter for
1 x FPK, 6 pcs Fitting Pack Union Connector 3/8 x 1/4 inch
1 x WH-250, Whole House Water Treatment Sediment Carbon Filter Syste
1 x Bundle Filter Annual set KPAK-104 Sediment Carbo Block DI Resin
1 x 2nd stage C10 carbon block filter (replace every 6-12 months)
1 x B2010, 20" Big Blue Filter Housing Cartridge WH20 WH25 WH250
1 x 752set, DC Booster Pump Transformer Solenoid Pressure Switch All
1 x *Discontinued* RD106
1 x 3rd stage C10 carbon block filter (replace every 6-12 months)
1 x 205, 3rd stage solid carbon block filter (replace every 12month)
1 x TMR-25A, 2.5 AMP Transformer Power Supply Ballast for 8800 5853
1 x 1070, PAE LARGE RO Storage Pressure Tank 14 GALLON 14G
1 x MK8002, Maintenance kit for double membrane system RD322 RO260
1 x FV-14, Bobby Float Valve Side Mount RM292-12-N NSF USA
1 x 7044-K Union Tee Connector Fitting Compression type 1/4"
1 x 701C, FHC1014 Filter Housing Chamber Casing Clear Color 1/4 FPT
1 x 759, Aquatec Demand Delivery Pump 5853-7E12-J524 Commercial 1.7G
1 x CKV0402, Blue color Elbow Check Valve Elbow Type
1 x 4044-K Male Elbow Fitting Compression type 1/4" OD 1/4" NPT
1 x 752, DC Booster Pump w/ Transformer
3 x Optional: 566 Filter Housing Wrench Opener WaterGeneral System
1 x NM-5001C, HONEYWELL COUNTERTOP WATER FILTER *DISCONTINUED* SW1
1 x *Discontinued* RO585NTF
1 x 532wpg, PAE RO water pressure white tank bladder gauge valve 4G
1 x Value Pack- Entire 3 Years of Replacement Filters Bundle AR122
1 x MK300, Maintenance kit for RO535, RO435, RO545, AR104H
1 x 818, DI Resin Refill Bag 16oz (good for up to three refills)
1 x Value Pack- Entire 3 Years of Replacement Filters Bundle K5
1 x KF320UP, SUBSTITUTE/Upgrade Faucet BRUSHED NICKEL STAINLESS STEE
1 x BUNDLE PACK ANNUAL FILTER KIT FK3 WaterGeneral 102 150 (3 ITEMS)

View Cart$7,775.86

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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