Log In Log In  |  Checkout   |  115 item(s)
1 x 215, 5th or 6th Stage Refillable inline DI filter (color change)
1 x KF310UP, SUBSTITUTE/Upgrade to KYTON FAUCET POLISHED CHROME FINI
1 x FRQ300, Flow Restrictor 300ML / min
1 x Parts, Ro Water System Installation Parts Bag 1/4"
1 x 718TB12, Half Inch Tubing 20 feet 1/2" LLDPE PE White Tube
1 x .K5NTF KoolerMax K5 RO System Shell without tank and faucet
1 x WH-10, Whole House Water Treatment Carbon Filter System 10" Big
2 x 205 2nd stage solid carbon block filter (replace every 12 month)
1 x B1034, 10" Big Blue Filter Housing Cartridge WH5 WH10 WH1134
1 x *Discontinued* RO585A
1 x 531, PAE RO Storage Pressure Osmosis Water Tank Container 3G
1 x FPK, 6 pcs Fitting Pack Union Connector 3/8 x 1/4 inch
1 x Optional: 564 Membrane Filter Housing Wrench Opener
1 x CP-OR35+701 O-RING FOR WATERGENERAL BOTTOM FILTER HOUSING CASING
2 x 701C, FHC1014 Filter Housing Chamber Casing Clear Color 1/4 FPT
1 x 602, UV Ultra Violet Sterilization Light Bulb ystem (6 watts)
1 x FHP2012, 20" long Filter Cartridge Casing Housing RO260 RD322
1 x 719, Drain Saddle Clamp / Valve
1 x WH-5, Whole House Water Treatment Sediment Filter System 10" Big
3 x 201, 1st stage sediment filter (replace every 6-12 months)
1 x 718xl, Tubing 100 feet 1/4" white tube LLDPE PE for drinking wat
1 x 673, Replacement UV Lamp Light for 602 (6 Watts)
1 x 718b Blue Color Tubing 24 feet 1/4" LLDPE PE tube drinking water
1 x *Discontinued* RO6ALK
2 x 1070, PAE LARGE RO Storage Pressure Tank 14 GALLON 14G
3 x Wrench 2 pcs 566 Standard Filter Housing Opener Double Better
1 x CP-KOR45, O RING FOR KOOLERMAX BOTTOM FILTER HOUSING CASING
1 x .RO260 Aquarium 300G REVERSE OSMOSIS AEROPONICS HYDROPONICS RO
1 x 4042-K Male Elbow Fitting Compression type(membrane housing use)
1 x WH1134 Whole House Restaurant Filter System Sediment Carbon Big
2 x 3150, 4th stage TFC-150 US membrane filter (every 2-3 yrs)
1 x 752set, DC Booster Pump Transformer Solenoid Pressure Switch All
1 x KM701, Special Koolermax Filter Housing Canister Casing 1/4 FPT
2 x MK800, Maintenance kit for AR122, AR125, HK120, RD150, RO155
1 x WS-150M, Whole House Water Softener
1 x WSACF-150T, Whole House Water Treatment ACF-150T
1 x .K5 KoolerMax 75GPD 5 STAGE REVERSE OSMOSIS RO FILTER SYSTEM
2 x Optional: 566 Filter Housing Wrench Opener WaterGeneral System
1 x 723, Feed Water Adapter with Ball Valve
1 x .K6150P, KoolerMax 150GPD 6 Stage RO System w/ Booster Pump
1 x KF511UP SUBSTITUTE/Upgrade Faucet CHROME GOLD TRIM CROSS HANDLE
1 x Value Pack- Entire 3 Years of Replacement Filters Bundle K6150P
2 x 752, DC Booster Pump w/ Transformer
1 x DB40, DI Resin Refill Bag for DI210, RD322
1 x 568,Heavy-Duty Filter Housing Wrench, HoneyWell or FilterCold
2 x Optional 566 Filter Housing Wrench Case Opener KoolerMax System
1 x CBV-38, Tank Ball Valve to 3/8 tubing
1 x 741-14, Diverter Valve for Countertop Water Units
1 x 717, Tubing 15 feet 1/4" white tube LLDPE PE for drinking water
2 x 532b, PAE RO Water Storage Pressure Osmosis Tank Container 4G
1 x 709C, Disc Shape Auto Shut Off Valve 4-way Four Way Valve
1 x 718, Tubing 30 feet 1/4" white tube LLDPE PE for drinking water
2 x 532w, PAE RO Storage Pressure Osmosis Water Tank Container 4G
1 x MKP, Maintenance kit for K5150P K6150P AR150P
1 x CPR-150G, Pressure Regulator with Pressure Gauge (0-125 psi)
1 x WH-250, Whole House Water Treatment Sediment Carbon Filter Syste
1 x FRQ420, Flow Restrictor 420ML / min
1 x 706, Membrane Filter Casing Housing Assembly
1 x WH-20, Whole House Water Treatment Carbon Block Filter System Bi
2 x 532wpg, PAE RO water pressure white tank bladder gauge valve 4G
1 x 326, 3rd stage TFC 24 /26 US membrane filter (replace 2-3 yrs)
1 x .AR125 Dual Outputs Aquarium & Home Drinking RO Filter System
1 x 205, 2nd stage carbon block filter (replace every 12 months)
1 x *Discontinued* RO585NTF
1 x 733, Built-in Pressure Gauge 0 to 150 psi for Koolermax RO syste
1 x FM40, STEEL BRACKET DOUBLE HOUSING 10" STANDARD
1 x *Discontinued* RD106
1 x RF62, Replacement filter for CT-6000, UC7000, SW-1, and SW-1C
1 x *Discontinued* RO585ERP
1 x 205, 3rd stage solid carbon block filter (replace every 12month)
1 x 350UP, Upgrade Kit TFC50 gal/day (includes US membrane filter)
1 x .AR125NTF KoolerMax AR125 RO System Shell without tank & faucet
1 x .AR150P, AQUARIUM & DRINKING 2 OUTPUTS Reverse Osmosis RO+DI+P
1 x MK200, Maintenance kit for Rotek Systems RCT-103 and RTF-265
1 x 7044-K Union Tee Connector Fitting Compression type 1/4"
1 x FM90, STEEL BRACKET SINGLE HOUSING MOUNTING BIG BLUE WH SYSTEM
1 x MK225, Maintenance kit for Honeywell RO9100 Filtercold RO5 AV180
1 x .K6NTF KoolerMax K6ALK RO shell without tank and faucet
1 x 6044-combo Compression Type Fitting Elbow and Tee fitting
1 x EMT-10, Empty Filter Cartridge Casing Housing
1 x FPK11, High Quality Fitting and Connector 1/4" (Value-Pack)
1 x FM60, STEEL BRACKET TRIPLE HOUSING 10" STANDARD FOR RO MOUNT
1 x 5th stage 225 Inline Alkaline filter with clear housing (annual)
1 x 205, 5th stage final carbon filter
1 x 335UP, Upgrade Kit TFC 35 gal/day (includes US membrane filter)
1 x 532bpg, PAE RO water pressure tank blue bladder gauge valve 4G
1 x 2nd stage C10 carbon block filter (replace every 6-12 months)
1 x KF355UP, SUBSTITUTE/Upgrade to Antique Brushed Brass Iron Finish
1 x CKV0402, Blue color Elbow Check Valve Elbow Type
1 x 213, 4th stage inline carbon filter (replace every 12 months)
1 x 718TB38, Tubing, 20 feet 3/8" white LLDPE PE for drinking water
1 x CBV-0404, Tank Ball Valve to 1/4 tubing *standard RO tank size*
1 x Optional 5th or 6th Stage upgrade inline DI filter(color change)
1 x 732, Inline Pressure Gauge 0 to 300 psi for RO filter system
1 x CP-KOR24, O-RING Oring FOR KOOLERMAX MEMBRANE FILTER HOUSING
1 x 1st stage SF05 sediment filter (replace every 6-12 months)
1 x .K5150PNTF, KoolerMax K5150P RO System Shell without tank faucet
1 x KF320UP, SUBSTITUTE/Upgrade Faucet BRUSHED NICKEL STAINLESS STEE
1 x KM701C, Special Koolermax Filter Housing Canister Casing 1/4 FPT
1 x O-RING FOR WH10 WHOLE HOUSE SYSTEM HOUSING BIG BLUE 10" CANISTER

View Cart$11,773.39
Specials Log InCreate Account Checkout  Shopping Cart115 item(s)
1 x 215, 5th or 6th Stage Refillable inline DI filter (color change)
1 x KF310UP, SUBSTITUTE/Upgrade to KYTON FAUCET POLISHED CHROME FINI
1 x FRQ300, Flow Restrictor 300ML / min
1 x Parts, Ro Water System Installation Parts Bag 1/4"
1 x 718TB12, Half Inch Tubing 20 feet 1/2" LLDPE PE White Tube
1 x .K5NTF KoolerMax K5 RO System Shell without tank and faucet
1 x WH-10, Whole House Water Treatment Carbon Filter System 10" Big
2 x 205 2nd stage solid carbon block filter (replace every 12 month)
1 x B1034, 10" Big Blue Filter Housing Cartridge WH5 WH10 WH1134
1 x *Discontinued* RO585A
1 x 531, PAE RO Storage Pressure Osmosis Water Tank Container 3G
1 x FPK, 6 pcs Fitting Pack Union Connector 3/8 x 1/4 inch
1 x Optional: 564 Membrane Filter Housing Wrench Opener
1 x CP-OR35+701 O-RING FOR WATERGENERAL BOTTOM FILTER HOUSING CASING
2 x 701C, FHC1014 Filter Housing Chamber Casing Clear Color 1/4 FPT
1 x 602, UV Ultra Violet Sterilization Light Bulb ystem (6 watts)
1 x FHP2012, 20" long Filter Cartridge Casing Housing RO260 RD322
1 x 719, Drain Saddle Clamp / Valve
1 x WH-5, Whole House Water Treatment Sediment Filter System 10" Big
3 x 201, 1st stage sediment filter (replace every 6-12 months)
1 x 718xl, Tubing 100 feet 1/4" white tube LLDPE PE for drinking wat
1 x 673, Replacement UV Lamp Light for 602 (6 Watts)
1 x 718b Blue Color Tubing 24 feet 1/4" LLDPE PE tube drinking water
1 x *Discontinued* RO6ALK
2 x 1070, PAE LARGE RO Storage Pressure Tank 14 GALLON 14G
3 x Wrench 2 pcs 566 Standard Filter Housing Opener Double Better
1 x CP-KOR45, O RING FOR KOOLERMAX BOTTOM FILTER HOUSING CASING
1 x .RO260 Aquarium 300G REVERSE OSMOSIS AEROPONICS HYDROPONICS RO
1 x 4042-K Male Elbow Fitting Compression type(membrane housing use)
1 x WH1134 Whole House Restaurant Filter System Sediment Carbon Big
2 x 3150, 4th stage TFC-150 US membrane filter (every 2-3 yrs)
1 x 752set, DC Booster Pump Transformer Solenoid Pressure Switch All
1 x KM701, Special Koolermax Filter Housing Canister Casing 1/4 FPT
2 x MK800, Maintenance kit for AR122, AR125, HK120, RD150, RO155
1 x WS-150M, Whole House Water Softener
1 x WSACF-150T, Whole House Water Treatment ACF-150T
1 x .K5 KoolerMax 75GPD 5 STAGE REVERSE OSMOSIS RO FILTER SYSTEM
2 x Optional: 566 Filter Housing Wrench Opener WaterGeneral System
1 x 723, Feed Water Adapter with Ball Valve
1 x .K6150P, KoolerMax 150GPD 6 Stage RO System w/ Booster Pump
1 x KF511UP SUBSTITUTE/Upgrade Faucet CHROME GOLD TRIM CROSS HANDLE
1 x Value Pack- Entire 3 Years of Replacement Filters Bundle K6150P
2 x 752, DC Booster Pump w/ Transformer
1 x DB40, DI Resin Refill Bag for DI210, RD322
1 x 568,Heavy-Duty Filter Housing Wrench, HoneyWell or FilterCold
2 x Optional 566 Filter Housing Wrench Case Opener KoolerMax System
1 x CBV-38, Tank Ball Valve to 3/8 tubing
1 x 741-14, Diverter Valve for Countertop Water Units
1 x 717, Tubing 15 feet 1/4" white tube LLDPE PE for drinking water
2 x 532b, PAE RO Water Storage Pressure Osmosis Tank Container 4G
1 x 709C, Disc Shape Auto Shut Off Valve 4-way Four Way Valve
1 x 718, Tubing 30 feet 1/4" white tube LLDPE PE for drinking water
2 x 532w, PAE RO Storage Pressure Osmosis Water Tank Container 4G
1 x MKP, Maintenance kit for K5150P K6150P AR150P
1 x CPR-150G, Pressure Regulator with Pressure Gauge (0-125 psi)
1 x WH-250, Whole House Water Treatment Sediment Carbon Filter Syste
1 x FRQ420, Flow Restrictor 420ML / min
1 x 706, Membrane Filter Casing Housing Assembly
1 x WH-20, Whole House Water Treatment Carbon Block Filter System Bi
2 x 532wpg, PAE RO water pressure white tank bladder gauge valve 4G
1 x 326, 3rd stage TFC 24 /26 US membrane filter (replace 2-3 yrs)
1 x .AR125 Dual Outputs Aquarium & Home Drinking RO Filter System
1 x 205, 2nd stage carbon block filter (replace every 12 months)
1 x *Discontinued* RO585NTF
1 x 733, Built-in Pressure Gauge 0 to 150 psi for Koolermax RO syste
1 x FM40, STEEL BRACKET DOUBLE HOUSING 10" STANDARD
1 x *Discontinued* RD106
1 x RF62, Replacement filter for CT-6000, UC7000, SW-1, and SW-1C
1 x *Discontinued* RO585ERP
1 x 205, 3rd stage solid carbon block filter (replace every 12month)
1 x 350UP, Upgrade Kit TFC50 gal/day (includes US membrane filter)
1 x .AR125NTF KoolerMax AR125 RO System Shell without tank & faucet
1 x .AR150P, AQUARIUM & DRINKING 2 OUTPUTS Reverse Osmosis RO+DI+P
1 x MK200, Maintenance kit for Rotek Systems RCT-103 and RTF-265
1 x 7044-K Union Tee Connector Fitting Compression type 1/4"
1 x FM90, STEEL BRACKET SINGLE HOUSING MOUNTING BIG BLUE WH SYSTEM
1 x MK225, Maintenance kit for Honeywell RO9100 Filtercold RO5 AV180
1 x .K6NTF KoolerMax K6ALK RO shell without tank and faucet
1 x 6044-combo Compression Type Fitting Elbow and Tee fitting
1 x EMT-10, Empty Filter Cartridge Casing Housing
1 x FPK11, High Quality Fitting and Connector 1/4" (Value-Pack)
1 x FM60, STEEL BRACKET TRIPLE HOUSING 10" STANDARD FOR RO MOUNT
1 x 5th stage 225 Inline Alkaline filter with clear housing (annual)
1 x 205, 5th stage final carbon filter
1 x 335UP, Upgrade Kit TFC 35 gal/day (includes US membrane filter)
1 x 532bpg, PAE RO water pressure tank blue bladder gauge valve 4G
1 x 2nd stage C10 carbon block filter (replace every 6-12 months)
1 x KF355UP, SUBSTITUTE/Upgrade to Antique Brushed Brass Iron Finish
1 x CKV0402, Blue color Elbow Check Valve Elbow Type
1 x 213, 4th stage inline carbon filter (replace every 12 months)
1 x 718TB38, Tubing, 20 feet 3/8" white LLDPE PE for drinking water
1 x CBV-0404, Tank Ball Valve to 1/4 tubing *standard RO tank size*
1 x Optional 5th or 6th Stage upgrade inline DI filter(color change)
1 x 732, Inline Pressure Gauge 0 to 300 psi for RO filter system
1 x CP-KOR24, O-RING Oring FOR KOOLERMAX MEMBRANE FILTER HOUSING
1 x 1st stage SF05 sediment filter (replace every 6-12 months)
1 x .K5150PNTF, KoolerMax K5150P RO System Shell without tank faucet
1 x KF320UP, SUBSTITUTE/Upgrade Faucet BRUSHED NICKEL STAINLESS STEE
1 x KM701C, Special Koolermax Filter Housing Canister Casing 1/4 FPT
1 x O-RING FOR WH10 WHOLE HOUSE SYSTEM HOUSING BIG BLUE 10" CANISTER

View Cart$11,773.39

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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