Log In Log In  |  Checkout   |  163 item(s)
1 x TMR-UV-6W, Replacement UV Ballast Transformer 6 Watts for 602 UV
2 x 581, Ice Maker Hookup Kit Connect RO water to Fridge Ice Maker
1 x Annual Filter Kit Koolermax Series KPAK-3 Sediment Carbon Block
2 x 532b, PAE RO Water Storage Pressure Osmosis Tank Container 4G
5 x Optional: 564 Membrane Filter Housing Wrench Opener
1 x 741-14, Diverter Valve for Countertop Water Units
2 x Value Pack- Entire 3 Years of Replacement Filters Bundle AR150P
1 x 720, Feed Water Adapter with Needle Valve
2 x CPR-150G, Pressure Regulator with Pressure Gauge (0-125 psi)
1 x 721, Self-Piercing Valve, Feed Water Adapter for Copper Pipe
1 x Bundle Filter KPAK-104bm Sediment Carbon DI Resin Membrane
3 x 205 2nd stage solid carbon block filter (replace every 12 month)
1 x SV-24DC-14, Solenoid Valve ESO 1/4" plastic, 24V DC
1 x SV-24AC-14, Solenoid Valve for Aquatec pump only 1/4" 24VAC ESO
5 x 201, 1st stage sediment filter (replace every 6-12 months)
1 x SV-24AC-14, Solenoid Valve ESO for Aquatec pump 1/4" wiring
1 x 3.CB2010, 3rd stage carbon block filter 20" inch for RD322 RO260
1 x KF310, Elite Series: Polish Chrome Drinking Water Faucet
3 x Optional: 566 Filter Housing Wrench Opener WaterGeneral System
1 x KF511UP SUBSTITUTE/Upgrade Faucet CHROME GOLD TRIM CROSS HANDLE
1 x HK120 KoolerMax Aeroponics Hydroponics 150G RO Filtration System
1 x 385, 4th stage TFC 75/85 US membrane filter (every 2-3 yrs)
3 x 733, Built-in Pressure Gauge 0 to 150 psi for Koolermax RO syste
1 x FPK, High Quality Fitting and Connector 3/8" (Value-Pack)
1 x 310, 2nd stage CTA 10 US Membrane filter (every 2-3 yrs)
1 x 578b, TDS-3 Battery Batteries for #578 TDS Water Quality Meter
2 x PSW-360 Aquatec Pressure Switch 60 psi shut off 3/8" tubing TSO
2 x Value Pack- Entire 3 Years of Replacement Filters Bundle RO6ALK
2 x Value Pack- Entire 3 Years of Replacement Filters Bundle RD102
1 x MK550, Maintenance kit for RO585, RD102, RD106, RO6, K5, K6
1 x WH-20, Whole House Water Treatment Carbon Block Filter System Bi
1 x CP-OR35+701 O-RING FOR WATERGENERAL BOTTOM FILTER HOUSING CASING
4 x Parts, Ro Water System Installation Parts Bag 1/4"
1 x Value Pack- Entire 3 Years of Replacement Filters Bundle RD150
1 x DB40, DI Resin Refill Bag for DI210, RD322
2 x Optional 225UP 5th stage Inline Alkaline upgrade(includes media)
2 x 1.SED2005, 1st stage sediment filter 20" inch for RD322 RO260
4 x 532w, PAE RO Storage Pressure Osmosis Water Tank Container 4G
2 x 2nd stage C10 carbon block filter (replace every 6-12 months)
1 x Annual Filter Kit Koolermax Series KPAK-4 Sediment Carbon Block
2 x 4044-K Male Elbow Fitting Compression type 1/4" OD 1/4" NPT
1 x 277, SED1005BB Big Blue 5 micron sediment filter 10"
1 x 2542-K, Female Connector 1/4 OD 1/8 FNPT Compression Fitting
1 x FKD-66, Replacement Filter Pack SED2005 CB2010 DB40 for RD322
1 x 578, TDS Water Quality Meter tds-3
2 x Optional 566 Filter Housing Wrench Case Opener KoolerMax System
1 x B1034, 10" Big Blue Filter Housing Cartridge WH5 WH10 WH1134
3 x KM701, Special Koolermax Filter Housing Canister Casing 1/4 FPT
1 x bulk201, Sediment Filter
1 x 335, 4th stage TFC 35/45 US membrane filter (every 2-3 years)
1 x HK120-P-220V KoolerMax Aeroponics Hydroponics RO + Booster Pump
1 x 531, PAE RO Storage Pressure Osmosis Water Tank Container 3G
2 x Value Pack- Entire 3 Years of Replacement Filters Bundle RO260
1 x MK8002, Maintenance kit for double membrane system RD322 RO260
1 x FHP2012, 20" long Filter Cartridge Casing Housing RO260 RD322
1 x 752set, DC Booster Pump Transformer Solenoid Pressure Switch All
1 x FM40, STEEL BRACKET DOUBLE HOUSING 10" STANDARD
1 x 7044-K Union Tee Connector Fitting Compression type 1/4"
1 x 1070, PAE LARGE RO Storage Pressure Tank 14 GALLON 14G
1 x UU Clips Pair Membrane to Membrane, 2.5" to 2.5"
1 x Value Pack- Entire 3 Years of Replacement Filters Bundle RD322
1 x NM-5001C, HONEYWELL COUNTERTOP WATER FILTER *DISCONTINUED* SW1
1 x CKV0402, Blue color Elbow Check Valve Elbow Type
1 x KF320UP, SUBSTITUTE/Upgrade Faucet BRUSHED NICKEL STAINLESS STEE
1 x 3rd stage C10 carbon block filter (replace every 6-12 months)
1 x BUNDLE PACK ANNUAL FILTER KIT FK3 WaterGeneral 102 150 (3 ITEMS)
1 x Value Pack- Entire 3 Years of Replacement Filters Bundle RO585
1 x 215, 5th or 6th Stage Refillable inline DI filter (color change)
1 x 732, Inline Pressure Gauge 0 to 300 psi for RO filter system
1 x WH-10, Whole House Water Treatment Carbon Filter System 10" Big
1 x 709, Automatic Shut Off Valve 4-way Four Way Valve
1 x FK-53, Replacement Filter Pack SED2005 CB2010 for RD322 RO260
1 x *Discontinued* RO155
1 x FV-14, Bobby Float Valve Side Mount RM292-12-N NSF USA
1 x 4042-K Male Elbow Fitting Compression type(membrane housing use)
1 x PSW-3100 Aquatec Pressure Switch 100 psi shut off 3/8 tubing TSO
3 x Wrench 2 pcs 566 Standard Filter Housing Opener Double Better
1 x UU Clips Pair Membrane to Filter, 2.5" to 2"
1 x 4044-K qty 2 Male Elbow Fitting Compression type 1/4"
1 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
2 x 6044-combo Compression Type Fitting Elbow and Tee fitting
1 x 532bpg, PAE RO water pressure tank blue bladder gauge valve 4G
1 x .AR125NTF KoolerMax AR125 RO System Shell without tank & faucet
3 x 3150, 4th stage TFC-150 US membrane filter (every 2-3 yrs)
1 x CBV-0404, Tank Ball Valve to 1/4 tubing *standard RO tank size*
1 x ACT-820-JG Aquatec Pulsation Dampener Accumulator Pressure Tank
1 x KF511, Polished Chrome Cross-Handle with Gold Trim Faucet
1 x PSW-350, Pressure Switch for RO Booster Pump 1/4" TSO
1 x FPK11, High Quality Fitting and Connector 1/4" (Value-Pack)
1 x MK300, Maintenance kit for RO535, RO435, RO545, AR104H
1 x 565, Digital Pressure Gauge Tester Monitor
1 x 727, Feed Water Adapter 3/8" compression adapter 1/4" inline bal
1 x 755, Aquatec Demand Delivery Pump 5851-7E12-J574 Increase Output
1 x B2012, 20" Long Slim Filter Cartridge Housing RO260 RD322
1 x 4th stage Optional Refill bag #818 DI Resin Refill Bag
1 x FPK, 6 pcs Fitting Pack Union Connector 1/2 x 3/8 inch
1 x Bundle Filter Annual set KPAK-104b Sediment Carbon Resin Refill
1 x DM-2, Inline Dual TDS monitor (meter) for RO DI System DM2
1 x 6th Stage pn215 Refillable inline DI filter (color change)
1 x FM-8100T, DigiFlow Digital Water Flow Rate Meter 56" cable
1 x 215, 5th or 6th Stage Refillable inline DI filter (color change)
1 x 3150, 5th stage TFC-150 US membrane filter (every 2-3 years)
1 x MK420, Maintenance kit for RO565
1 x Bundle Filter Annual set KPAK-104 Sediment Carbo Block DI Resin
2 x .AR104H High Efficiency Membrane Aquarium Reef Aeroponics RO DI
1 x Value Pack- Entire 3 Years of Replacement Filters Bundle HK120
1 x FV-15, Bobby Float Valve Top Mount RM292P-N UNS CEL NSF USA
1 x 532wpg, PAE RO water pressure white tank bladder gauge valve 4G
1 x SV-24DC-38-Plastic, KSD Solenoid Valve 3/8" 24V DC ESO
1 x Special, Single Stage Housing Bracket Shell Connection Kit
1 x MKP, Maintenance kit for K5150P K6150P AR150P
1 x PSW-340 Aquatec Pressure Switch 40 psi shut off 3/8" tubing TSO
1 x bulk205, Carbon Block Filter
1 x NM-5104, HONEYWELL COUNTERTOP WATER FILTER *DISCONTINUED* SW1
1 x UC7000 HONEYWELL UNDER THE COUNTER WATER FILTER (WHITE, LARGE)
1 x SV-24DC-38-Brass KSD Solenoid Valve 3/8" brass 24V DC ESO
1 x 1st stage SF05 sediment filter (replace every 6-12 months)
1 x 671C, Replacement UV Lamp Light for 609C (16 Watt)
1 x 673, Replacement UV Lamp Light for 602 (6 Watts)
1 x PSW-240 Aquatec Pressure Switch 40 psi shut off 1/4" tubing TSO
1 x 1044-K Male Connector 1/4 OD x 1/4 NPT Compression Fitting

View Cart$7,808.27
Specials Log InCreate Account Checkout  Shopping Cart163 item(s)
1 x TMR-UV-6W, Replacement UV Ballast Transformer 6 Watts for 602 UV
2 x 581, Ice Maker Hookup Kit Connect RO water to Fridge Ice Maker
1 x Annual Filter Kit Koolermax Series KPAK-3 Sediment Carbon Block
2 x 532b, PAE RO Water Storage Pressure Osmosis Tank Container 4G
5 x Optional: 564 Membrane Filter Housing Wrench Opener
1 x 741-14, Diverter Valve for Countertop Water Units
2 x Value Pack- Entire 3 Years of Replacement Filters Bundle AR150P
1 x 720, Feed Water Adapter with Needle Valve
2 x CPR-150G, Pressure Regulator with Pressure Gauge (0-125 psi)
1 x 721, Self-Piercing Valve, Feed Water Adapter for Copper Pipe
1 x Bundle Filter KPAK-104bm Sediment Carbon DI Resin Membrane
3 x 205 2nd stage solid carbon block filter (replace every 12 month)
1 x SV-24DC-14, Solenoid Valve ESO 1/4" plastic, 24V DC
1 x SV-24AC-14, Solenoid Valve for Aquatec pump only 1/4" 24VAC ESO
5 x 201, 1st stage sediment filter (replace every 6-12 months)
1 x SV-24AC-14, Solenoid Valve ESO for Aquatec pump 1/4" wiring
1 x 3.CB2010, 3rd stage carbon block filter 20" inch for RD322 RO260
1 x KF310, Elite Series: Polish Chrome Drinking Water Faucet
3 x Optional: 566 Filter Housing Wrench Opener WaterGeneral System
1 x KF511UP SUBSTITUTE/Upgrade Faucet CHROME GOLD TRIM CROSS HANDLE
1 x HK120 KoolerMax Aeroponics Hydroponics 150G RO Filtration System
1 x 385, 4th stage TFC 75/85 US membrane filter (every 2-3 yrs)
3 x 733, Built-in Pressure Gauge 0 to 150 psi for Koolermax RO syste
1 x FPK, High Quality Fitting and Connector 3/8" (Value-Pack)
1 x 310, 2nd stage CTA 10 US Membrane filter (every 2-3 yrs)
1 x 578b, TDS-3 Battery Batteries for #578 TDS Water Quality Meter
2 x PSW-360 Aquatec Pressure Switch 60 psi shut off 3/8" tubing TSO
2 x Value Pack- Entire 3 Years of Replacement Filters Bundle RO6ALK
2 x Value Pack- Entire 3 Years of Replacement Filters Bundle RD102
1 x MK550, Maintenance kit for RO585, RD102, RD106, RO6, K5, K6
1 x WH-20, Whole House Water Treatment Carbon Block Filter System Bi
1 x CP-OR35+701 O-RING FOR WATERGENERAL BOTTOM FILTER HOUSING CASING
4 x Parts, Ro Water System Installation Parts Bag 1/4"
1 x Value Pack- Entire 3 Years of Replacement Filters Bundle RD150
1 x DB40, DI Resin Refill Bag for DI210, RD322
2 x Optional 225UP 5th stage Inline Alkaline upgrade(includes media)
2 x 1.SED2005, 1st stage sediment filter 20" inch for RD322 RO260
4 x 532w, PAE RO Storage Pressure Osmosis Water Tank Container 4G
2 x 2nd stage C10 carbon block filter (replace every 6-12 months)
1 x Annual Filter Kit Koolermax Series KPAK-4 Sediment Carbon Block
2 x 4044-K Male Elbow Fitting Compression type 1/4" OD 1/4" NPT
1 x 277, SED1005BB Big Blue 5 micron sediment filter 10"
1 x 2542-K, Female Connector 1/4 OD 1/8 FNPT Compression Fitting
1 x FKD-66, Replacement Filter Pack SED2005 CB2010 DB40 for RD322
1 x 578, TDS Water Quality Meter tds-3
2 x Optional 566 Filter Housing Wrench Case Opener KoolerMax System
1 x B1034, 10" Big Blue Filter Housing Cartridge WH5 WH10 WH1134
3 x KM701, Special Koolermax Filter Housing Canister Casing 1/4 FPT
1 x bulk201, Sediment Filter
1 x 335, 4th stage TFC 35/45 US membrane filter (every 2-3 years)
1 x HK120-P-220V KoolerMax Aeroponics Hydroponics RO + Booster Pump
1 x 531, PAE RO Storage Pressure Osmosis Water Tank Container 3G
2 x Value Pack- Entire 3 Years of Replacement Filters Bundle RO260
1 x MK8002, Maintenance kit for double membrane system RD322 RO260
1 x FHP2012, 20" long Filter Cartridge Casing Housing RO260 RD322
1 x 752set, DC Booster Pump Transformer Solenoid Pressure Switch All
1 x FM40, STEEL BRACKET DOUBLE HOUSING 10" STANDARD
1 x 7044-K Union Tee Connector Fitting Compression type 1/4"
1 x 1070, PAE LARGE RO Storage Pressure Tank 14 GALLON 14G
1 x UU Clips Pair Membrane to Membrane, 2.5" to 2.5"
1 x Value Pack- Entire 3 Years of Replacement Filters Bundle RD322
1 x NM-5001C, HONEYWELL COUNTERTOP WATER FILTER *DISCONTINUED* SW1
1 x CKV0402, Blue color Elbow Check Valve Elbow Type
1 x KF320UP, SUBSTITUTE/Upgrade Faucet BRUSHED NICKEL STAINLESS STEE
1 x 3rd stage C10 carbon block filter (replace every 6-12 months)
1 x BUNDLE PACK ANNUAL FILTER KIT FK3 WaterGeneral 102 150 (3 ITEMS)
1 x Value Pack- Entire 3 Years of Replacement Filters Bundle RO585
1 x 215, 5th or 6th Stage Refillable inline DI filter (color change)
1 x 732, Inline Pressure Gauge 0 to 300 psi for RO filter system
1 x WH-10, Whole House Water Treatment Carbon Filter System 10" Big
1 x 709, Automatic Shut Off Valve 4-way Four Way Valve
1 x FK-53, Replacement Filter Pack SED2005 CB2010 for RD322 RO260
1 x *Discontinued* RO155
1 x FV-14, Bobby Float Valve Side Mount RM292-12-N NSF USA
1 x 4042-K Male Elbow Fitting Compression type(membrane housing use)
1 x PSW-3100 Aquatec Pressure Switch 100 psi shut off 3/8 tubing TSO
3 x Wrench 2 pcs 566 Standard Filter Housing Opener Double Better
1 x UU Clips Pair Membrane to Filter, 2.5" to 2"
1 x 4044-K qty 2 Male Elbow Fitting Compression type 1/4"
1 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
2 x 6044-combo Compression Type Fitting Elbow and Tee fitting
1 x 532bpg, PAE RO water pressure tank blue bladder gauge valve 4G
1 x .AR125NTF KoolerMax AR125 RO System Shell without tank & faucet
3 x 3150, 4th stage TFC-150 US membrane filter (every 2-3 yrs)
1 x CBV-0404, Tank Ball Valve to 1/4 tubing *standard RO tank size*
1 x ACT-820-JG Aquatec Pulsation Dampener Accumulator Pressure Tank
1 x KF511, Polished Chrome Cross-Handle with Gold Trim Faucet
1 x PSW-350, Pressure Switch for RO Booster Pump 1/4" TSO
1 x FPK11, High Quality Fitting and Connector 1/4" (Value-Pack)
1 x MK300, Maintenance kit for RO535, RO435, RO545, AR104H
1 x 565, Digital Pressure Gauge Tester Monitor
1 x 727, Feed Water Adapter 3/8" compression adapter 1/4" inline bal
1 x 755, Aquatec Demand Delivery Pump 5851-7E12-J574 Increase Output
1 x B2012, 20" Long Slim Filter Cartridge Housing RO260 RD322
1 x 4th stage Optional Refill bag #818 DI Resin Refill Bag
1 x FPK, 6 pcs Fitting Pack Union Connector 1/2 x 3/8 inch
1 x Bundle Filter Annual set KPAK-104b Sediment Carbon Resin Refill
1 x DM-2, Inline Dual TDS monitor (meter) for RO DI System DM2
1 x 6th Stage pn215 Refillable inline DI filter (color change)
1 x FM-8100T, DigiFlow Digital Water Flow Rate Meter 56" cable
1 x 215, 5th or 6th Stage Refillable inline DI filter (color change)
1 x 3150, 5th stage TFC-150 US membrane filter (every 2-3 years)
1 x MK420, Maintenance kit for RO565
1 x Bundle Filter Annual set KPAK-104 Sediment Carbo Block DI Resin
2 x .AR104H High Efficiency Membrane Aquarium Reef Aeroponics RO DI
1 x Value Pack- Entire 3 Years of Replacement Filters Bundle HK120
1 x FV-15, Bobby Float Valve Top Mount RM292P-N UNS CEL NSF USA
1 x 532wpg, PAE RO water pressure white tank bladder gauge valve 4G
1 x SV-24DC-38-Plastic, KSD Solenoid Valve 3/8" 24V DC ESO
1 x Special, Single Stage Housing Bracket Shell Connection Kit
1 x MKP, Maintenance kit for K5150P K6150P AR150P
1 x PSW-340 Aquatec Pressure Switch 40 psi shut off 3/8" tubing TSO
1 x bulk205, Carbon Block Filter
1 x NM-5104, HONEYWELL COUNTERTOP WATER FILTER *DISCONTINUED* SW1
1 x UC7000 HONEYWELL UNDER THE COUNTER WATER FILTER (WHITE, LARGE)
1 x SV-24DC-38-Brass KSD Solenoid Valve 3/8" brass 24V DC ESO
1 x 1st stage SF05 sediment filter (replace every 6-12 months)
1 x 671C, Replacement UV Lamp Light for 609C (16 Watt)
1 x 673, Replacement UV Lamp Light for 602 (6 Watts)
1 x PSW-240 Aquatec Pressure Switch 40 psi shut off 1/4" tubing TSO
1 x 1044-K Male Connector 1/4 OD x 1/4 NPT Compression Fitting

View Cart$7,808.27

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:

Reviews
Home  |   Specials  |   Log In  |   Create Account  |   Checkout  |   Shopping Cart