Log In Log In  |  Checkout   |  139 item(s)
1 x .K6A KoolerMax 75GPD 6STAGE Alkaline pH REVERSE OSMOSIS RO FILTE
3 x 213, 5th or 6th stage inline carbon filter (replace in 12 mons)
1 x 3.CB2010, 3rd stage carbon block filter 20" inch for RD322 RO260
1 x SV-24DC-38-Brass KSD Solenoid Valve 3/8" brass 24V DC ESO
2 x 290, CB2010BB Big Blue 20" Carbon Block Filter WH20 WH250 WH2201
1 x SV-24AC-38, KSD Solenoid Valve ESO 3/8" brass, 24V AC
1 x HK120-P-220V KoolerMax Aeroponics Hydroponics RO + Booster Pump
1 x KF355UP, SUBSTITUTE/Upgrade to Antique Brushed Brass Iron Finish
1 x 385, 4th stage TFC 75/85 US membrane filter (every 2-3 yrs)
2 x 1070, PAE LARGE RO Storage Pressure Tank 14 GALLON 14G
1 x SV-24AC-14, Solenoid Valve for Aquatec pump only 1/4" 24VAC ESO
3 x Wrench 2 pcs 566 Standard Filter Housing Opener Double Better
1 x 2nd stage C10 carbon block filter (replace every 6-12 months)
3 x Optional 566 Filter Housing Wrench Case Opener KoolerMax System
1 x SC725, Specialty Filter Chloramines / Hydrogen Sulfide Removal
1 x 285, Big Blue SED2005BB 20" Sediment filter WH25 WH250 WH2201
1 x FKD-66, Replacement Filter Pack SED2005 CB2010 DB40 for RD322
1 x KF310UP, SUBSTITUTE/Upgrade to KYTON FAUCET POLISHED CHROME FINI
1 x Special, Single Stage Housing Bracket Shell Connection Kit
1 x HK120-P-TK-220V for EURO 220V / 50Hz
1 x TMR-25A, 2.5 AMP Transformer Power Supply Ballast for 8800 5853
2 x Optional: 566 Filter Housing Wrench Opener WaterGeneral System
1 x 225, 5th stage Inline Alkaline filter with clear case (annual)
1 x B2010, 20" Big Blue Filter Housing Cartridge WH20 WH25 WH250
1 x TMR-DC-2412, Transformer Power Supply for #752 Booster Pump
1 x 326, 3rd stage TFC 24 /26 US membrane filter (replace 2-3 yrs)
2 x 205, 3rd stage solid carbon block filter (replace every 12 month
1 x .AR104H High Efficiency Membrane Aquarium Reef Aeroponics RO DI
1 x 225UP, 5th stage Inline Alkaline upgrade (includes media)
6 x 532w, PAE RO Storage Pressure Osmosis Water Tank Container 4G
1 x .AR150P, AQUARIUM & DRINKING 2 OUTPUTS Reverse Osmosis RO+DI+P
1 x SET68, AQUATEC 6840 AC Pump Set Solenoid ESO Pressure Switch SET
3 x KM701C, Special Koolermax Filter Housing Canister Casing 1/4 FPT
1 x .AR125 Dual Outputs Aquarium & Home Drinking RO Filter System
2 x Optional: 564 Membrane Filter Housing Wrench Opener
1 x 3rd stage C10 carbon block filter (replace every 6-12 months)
1 x RF62, Replacement filter for CT-6000, UC7000, SW-1, and SW-1C
1 x *Discontinued* RD106
1 x PSW-260 Aquatec Pressure Switch 60 psi shut off 1/4" tubing TSO
2 x 532b, PAE RO Water Storage Pressure Osmosis Tank Container 4G
1 x ACT-820-JG Aquatec Pulsation Dampener Accumulator Pressure Tank
1 x 755, Aquatec Demand Delivery Pump 5851-7E12-J574 Increase Output
1 x 1.SED2005, 1st stage sediment filter 20" inch for RD322 RO260
1 x 756SET, Aquatec Permeate Pump Reverse Osmosis System ERP1000
1 x MK800, Maintenance kit for AR122, AR125, HK120, RD150, RO155
1 x UC7000 HONEYWELL UNDER THE COUNTER WATER FILTER (WHITE, LARGE)
1 x SET88 Aquatec 8852 AC Booster pump Solenoid ESO Pressure Switch
2 x 752, DC Booster Pump w/ Transformer
1 x 759, Aquatec Demand Delivery Pump 5853-7E12-J524 Commercial 1.7G
2 x 4th stage TFC150 US membrane filter (every 2-3 yrs)M150 P/N3150
1 x MK200, Maintenance kit for Rotek Systems RCT-103 and RTF-265
1 x PSW-350, Pressure Switch for RO Booster Pump 1/4" TSO
2 x 3150, 4th stage TFC-150 US membrane filter (every 2-3 yrs)
1 x SV-24AC-14, Solenoid Valve ESO for Aquatec pump 1/4" wiring
1 x *Discontinued* RO155C
4 x 205, 3rd stage solid carbon block filter (replace every 12month)
2 x CP-OR35+701 O-RING FOR WATERGENERAL BOTTOM FILTER HOUSING CASING
1 x 335, 4th stage TFC 35/45 US membrane filter (every 2-3 years)
2 x 350UP, Upgrade Kit TFC50 gal/day (includes US membrane filter)
2 x BBK20, Replacement Filter 20" Big Blue Whole House WH-2201 WH250
1 x 799, Siphon Pump Drinking Water Liquid Fluid Oil Manual Trasfer
1 x *Discontinued* RO6ALK
1 x 4th stage TFC 75/85 US membrane filter (every 2-3 yrs) M75
1 x KT-103, Optional Manual Membrane Flush Valve
1 x KM701, Special Koolermax Filter Housing Canister Casing 1/4 FPT
1 x .K5150PNTF, KoolerMax K5150P RO System Shell without tank faucet
1 x *Discontinued* RO155
2 x 532bpg, PAE RO water pressure tank blue bladder gauge valve 4G
1 x 1st stage SF05 sediment filter (replace every 6-12 months)
1 x 733, Built-in Pressure Gauge 0 to 150 psi for Koolermax RO syste
1 x Value Pack- Entire 3 Years of Replacement Filters Bundle RO260
1 x UC SHELL, Honeywell UC7000 Empty System Only No Filter
1 x PSW-280 Aquatec Pressure Switch 80 psi shut off 1/4 tubing TSO
1 x 3150, 5th stage TFC-150 US membrane filter (every 2-3 years)
1 x Annual Filter Kit Koolermax Series KPAK-4 Sediment Carbon Block
1 x SC209, Specialty Filter Nitrate Removal Filter
1 x 531, PAE RO Storage Pressure Osmosis Water Tank Container 3G
1 x FK-53, Replacement Filter Pack SED2005 CB2010 for RD322 RO260
1 x SVkit, Pump Shutoff Switch Kit for Aquatec Booster Pumps ESO TSO
1 x CDP8800, AQUATEC CDP8852-2J03-B424 Booster Pump Only Fitting
2 x 701, FH1014 Filter Housing Chamber Casing White Color 1/4 FPT
4 x 201, 1st stage sediment filter (replace every 6-12 months)
1 x SC412, Water Softening Filter Calcium Magnesium Hardness Removal
1 x 205 2nd stage solid carbon block filter (replace every 12 month)
1 x CDP6800, AQUATEC CDP6800 Booster Pump Only 6840-2J03-B224
1 x .AR125NTF KoolerMax AR125 RO System Shell without tank & faucet
1 x NM-5104, HONEYWELL COUNTERTOP WATER FILTER *DISCONTINUED* SW1
1 x .SW-1 COUNTERTOP WATER FILTER SYSTEM (WHITE HOUSING)
1 x HK120-PUMP KoolerMax Aeroponics Hydroponics System Booster Pump
1 x .K6150PNTF, KoolerMax K6150P RO System Shell without tank faucet
1 x NM-5103, HONEYWELL COUNTERTOP WATER FILTER *DISCONTINUED* SW1
1 x 671C, Replacement UV Lamp Light for 609C (16 Watt)
1 x Value Pack- Entire 3 Years of Replacement Filters Bundle RD322
1 x AQF-600-105, Flow Meter Panel Mount 1/2" MPT
1 x SET8855 Aquatec 5853 Booster Pump Assembly for Aeroponics System
1 x CP-KOR24, O-RING Oring FOR KOOLERMAX MEMBRANE FILTER HOUSING
1 x Liter Digiflow 1/4NPT Digital Flow Meter count up total Water
1 x 1044-K Male Connector 1/4 OD x 1/4 NPT Compression Fitting
1 x 6044-combo Compression Type Fitting Elbow and Tee fitting
1 x 335UP, Upgrade Kit TFC 35 gal/day (includes US membrane filter)
1 x 324, 4th stage TFC-24 US membrane filter (replace every 2-3 yrs)
1 x bulksf05, Koolermax Sediment Filter
1 x Y3414CH, Garden Hose Y Adapter Shut-Off Valve Metal Construction
1 x 4044-K Male Elbow Fitting Compression type 1/4" OD 1/4" NPT
1 x PH80, Digital pH Meter Hydrotester Calibration Storage Solutions
1 x Value Pack- Entire 3 Years of Replacement Filters Bundle RD106

View Cart$8,472.93
Specials Log InCreate Account Checkout  Shopping Cart139 item(s)
1 x .K6A KoolerMax 75GPD 6STAGE Alkaline pH REVERSE OSMOSIS RO FILTE
3 x 213, 5th or 6th stage inline carbon filter (replace in 12 mons)
1 x 3.CB2010, 3rd stage carbon block filter 20" inch for RD322 RO260
1 x SV-24DC-38-Brass KSD Solenoid Valve 3/8" brass 24V DC ESO
2 x 290, CB2010BB Big Blue 20" Carbon Block Filter WH20 WH250 WH2201
1 x SV-24AC-38, KSD Solenoid Valve ESO 3/8" brass, 24V AC
1 x HK120-P-220V KoolerMax Aeroponics Hydroponics RO + Booster Pump
1 x KF355UP, SUBSTITUTE/Upgrade to Antique Brushed Brass Iron Finish
1 x 385, 4th stage TFC 75/85 US membrane filter (every 2-3 yrs)
2 x 1070, PAE LARGE RO Storage Pressure Tank 14 GALLON 14G
1 x SV-24AC-14, Solenoid Valve for Aquatec pump only 1/4" 24VAC ESO
3 x Wrench 2 pcs 566 Standard Filter Housing Opener Double Better
1 x 2nd stage C10 carbon block filter (replace every 6-12 months)
3 x Optional 566 Filter Housing Wrench Case Opener KoolerMax System
1 x SC725, Specialty Filter Chloramines / Hydrogen Sulfide Removal
1 x 285, Big Blue SED2005BB 20" Sediment filter WH25 WH250 WH2201
1 x FKD-66, Replacement Filter Pack SED2005 CB2010 DB40 for RD322
1 x KF310UP, SUBSTITUTE/Upgrade to KYTON FAUCET POLISHED CHROME FINI
1 x Special, Single Stage Housing Bracket Shell Connection Kit
1 x HK120-P-TK-220V for EURO 220V / 50Hz
1 x TMR-25A, 2.5 AMP Transformer Power Supply Ballast for 8800 5853
2 x Optional: 566 Filter Housing Wrench Opener WaterGeneral System
1 x 225, 5th stage Inline Alkaline filter with clear case (annual)
1 x B2010, 20" Big Blue Filter Housing Cartridge WH20 WH25 WH250
1 x TMR-DC-2412, Transformer Power Supply for #752 Booster Pump
1 x 326, 3rd stage TFC 24 /26 US membrane filter (replace 2-3 yrs)
2 x 205, 3rd stage solid carbon block filter (replace every 12 month
1 x .AR104H High Efficiency Membrane Aquarium Reef Aeroponics RO DI
1 x 225UP, 5th stage Inline Alkaline upgrade (includes media)
6 x 532w, PAE RO Storage Pressure Osmosis Water Tank Container 4G
1 x .AR150P, AQUARIUM & DRINKING 2 OUTPUTS Reverse Osmosis RO+DI+P
1 x SET68, AQUATEC 6840 AC Pump Set Solenoid ESO Pressure Switch SET
3 x KM701C, Special Koolermax Filter Housing Canister Casing 1/4 FPT
1 x .AR125 Dual Outputs Aquarium & Home Drinking RO Filter System
2 x Optional: 564 Membrane Filter Housing Wrench Opener
1 x 3rd stage C10 carbon block filter (replace every 6-12 months)
1 x RF62, Replacement filter for CT-6000, UC7000, SW-1, and SW-1C
1 x *Discontinued* RD106
1 x PSW-260 Aquatec Pressure Switch 60 psi shut off 1/4" tubing TSO
2 x 532b, PAE RO Water Storage Pressure Osmosis Tank Container 4G
1 x ACT-820-JG Aquatec Pulsation Dampener Accumulator Pressure Tank
1 x 755, Aquatec Demand Delivery Pump 5851-7E12-J574 Increase Output
1 x 1.SED2005, 1st stage sediment filter 20" inch for RD322 RO260
1 x 756SET, Aquatec Permeate Pump Reverse Osmosis System ERP1000
1 x MK800, Maintenance kit for AR122, AR125, HK120, RD150, RO155
1 x UC7000 HONEYWELL UNDER THE COUNTER WATER FILTER (WHITE, LARGE)
1 x SET88 Aquatec 8852 AC Booster pump Solenoid ESO Pressure Switch
2 x 752, DC Booster Pump w/ Transformer
1 x 759, Aquatec Demand Delivery Pump 5853-7E12-J524 Commercial 1.7G
2 x 4th stage TFC150 US membrane filter (every 2-3 yrs)M150 P/N3150
1 x MK200, Maintenance kit for Rotek Systems RCT-103 and RTF-265
1 x PSW-350, Pressure Switch for RO Booster Pump 1/4" TSO
2 x 3150, 4th stage TFC-150 US membrane filter (every 2-3 yrs)
1 x SV-24AC-14, Solenoid Valve ESO for Aquatec pump 1/4" wiring
1 x *Discontinued* RO155C
4 x 205, 3rd stage solid carbon block filter (replace every 12month)
2 x CP-OR35+701 O-RING FOR WATERGENERAL BOTTOM FILTER HOUSING CASING
1 x 335, 4th stage TFC 35/45 US membrane filter (every 2-3 years)
2 x 350UP, Upgrade Kit TFC50 gal/day (includes US membrane filter)
2 x BBK20, Replacement Filter 20" Big Blue Whole House WH-2201 WH250
1 x 799, Siphon Pump Drinking Water Liquid Fluid Oil Manual Trasfer
1 x *Discontinued* RO6ALK
1 x 4th stage TFC 75/85 US membrane filter (every 2-3 yrs) M75
1 x KT-103, Optional Manual Membrane Flush Valve
1 x KM701, Special Koolermax Filter Housing Canister Casing 1/4 FPT
1 x .K5150PNTF, KoolerMax K5150P RO System Shell without tank faucet
1 x *Discontinued* RO155
2 x 532bpg, PAE RO water pressure tank blue bladder gauge valve 4G
1 x 1st stage SF05 sediment filter (replace every 6-12 months)
1 x 733, Built-in Pressure Gauge 0 to 150 psi for Koolermax RO syste
1 x Value Pack- Entire 3 Years of Replacement Filters Bundle RO260
1 x UC SHELL, Honeywell UC7000 Empty System Only No Filter
1 x PSW-280 Aquatec Pressure Switch 80 psi shut off 1/4 tubing TSO
1 x 3150, 5th stage TFC-150 US membrane filter (every 2-3 years)
1 x Annual Filter Kit Koolermax Series KPAK-4 Sediment Carbon Block
1 x SC209, Specialty Filter Nitrate Removal Filter
1 x 531, PAE RO Storage Pressure Osmosis Water Tank Container 3G
1 x FK-53, Replacement Filter Pack SED2005 CB2010 for RD322 RO260
1 x SVkit, Pump Shutoff Switch Kit for Aquatec Booster Pumps ESO TSO
1 x CDP8800, AQUATEC CDP8852-2J03-B424 Booster Pump Only Fitting
2 x 701, FH1014 Filter Housing Chamber Casing White Color 1/4 FPT
4 x 201, 1st stage sediment filter (replace every 6-12 months)
1 x SC412, Water Softening Filter Calcium Magnesium Hardness Removal
1 x 205 2nd stage solid carbon block filter (replace every 12 month)
1 x CDP6800, AQUATEC CDP6800 Booster Pump Only 6840-2J03-B224
1 x .AR125NTF KoolerMax AR125 RO System Shell without tank & faucet
1 x NM-5104, HONEYWELL COUNTERTOP WATER FILTER *DISCONTINUED* SW1
1 x .SW-1 COUNTERTOP WATER FILTER SYSTEM (WHITE HOUSING)
1 x HK120-PUMP KoolerMax Aeroponics Hydroponics System Booster Pump
1 x .K6150PNTF, KoolerMax K6150P RO System Shell without tank faucet
1 x NM-5103, HONEYWELL COUNTERTOP WATER FILTER *DISCONTINUED* SW1
1 x 671C, Replacement UV Lamp Light for 609C (16 Watt)
1 x Value Pack- Entire 3 Years of Replacement Filters Bundle RD322
1 x AQF-600-105, Flow Meter Panel Mount 1/2" MPT
1 x SET8855 Aquatec 5853 Booster Pump Assembly for Aeroponics System
1 x CP-KOR24, O-RING Oring FOR KOOLERMAX MEMBRANE FILTER HOUSING
1 x Liter Digiflow 1/4NPT Digital Flow Meter count up total Water
1 x 1044-K Male Connector 1/4 OD x 1/4 NPT Compression Fitting
1 x 6044-combo Compression Type Fitting Elbow and Tee fitting
1 x 335UP, Upgrade Kit TFC 35 gal/day (includes US membrane filter)
1 x 324, 4th stage TFC-24 US membrane filter (replace every 2-3 yrs)
1 x bulksf05, Koolermax Sediment Filter
1 x Y3414CH, Garden Hose Y Adapter Shut-Off Valve Metal Construction
1 x 4044-K Male Elbow Fitting Compression type 1/4" OD 1/4" NPT
1 x PH80, Digital pH Meter Hydrotester Calibration Storage Solutions
1 x Value Pack- Entire 3 Years of Replacement Filters Bundle RD106

View Cart$8,472.93

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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