Log In Log In  |  Checkout   |  92 item(s)
1 x Value Pack- Entire 3 Years of Replacement Filters Bundle HK120
1 x 225, 5th stage Inline Alkaline filter with clear case (annual)
1 x 741-38, Diverter Valve for RO DI Water Systems
2 x 5th or 6th Stage IC21 inline carbon filter (every 6 to 12 mons)
2 x 4044-K qty 2 Male Elbow Fitting Compression type 1/4"
1 x 6th Stage pn215 Refillable inline DI filter (color change)
1 x Wrench 2 pcs 566 Standard Filter Housing Opener Double Better
1 x Optional 566 Filter Housing Wrench Case Opener KoolerMax System
2 x 205, 3rd stage solid carbon block filter (replace every 12month)
1 x 720, Feed Water Adapter with Needle Valve
1 x Special, Single Stage Housing Bracket Shell Connection Kit
1 x Value Pack- Entire 3 Years of Replacement Filters Bundle RD106
1 x CPR-150G, Pressure Regulator with Pressure Gauge (0-125 psi)
1 x Special, Output Conversion Kit Convert from 1/4" to 3/8"
1 x PSW-280 Aquatec Pressure Switch 80 psi shut off 1/4 tubing TSO
1 x Value Pack- Entire 3 Years of Replacement Filters Bundle K6ALK
1 x HK120 KoolerMax Aeroponics Hydroponics 150G RO Filtration System
1 x Value Pack- Entire 3 Years of Replacement Filters Bundle RO585
1 x KT-103, Optional Manual Membrane Flush Valve
1 x Value Pack- Entire 3 Years of Replacement Filters Bundle RD322
2 x 752, DC Booster Pump w/ Transformer
1 x 818, DI Resin Refill Bag 16oz (good for up to three refills)
2 x 752set, DC Booster Pump Transformer Solenoid Pressure Switch All
1 x 718TB12, Half Inch Tubing 20 feet 1/2" LLDPE PE White Tube
1 x bulk818, DI resin refill bags Di-Ionization media
1 x bulksf05, Koolermax Sediment Filter
3 x KM701, Special Koolermax Filter Housing Canister Casing 1/4 FPT
1 x Optional: 564 Membrane Filter Housing Wrench Opener
3 x 532b, PAE RO Water Storage Pressure Osmosis Tank Container 4G
2 x 213, 5th or 6th stage inline carbon filter (replace in 12 mons)
2 x CBV-0404, Tank Ball Valve to 1/4 tubing *standard RO tank size*
2 x EMT-10, Empty Filter Cartridge Casing Housing
1 x 1070, PAE LARGE RO Storage Pressure Tank 14 GALLON 14G
2 x Optional 5th or 6th Stage upgrade inline DI filter(color change)
1 x FPK, 6 pcs Fitting Pack Union Connector 1/4" quarter inch
1 x 6044-K Tee Fitting Compression Type 1/4"OD 1/4" NPT
1 x 205, 2nd stage carbon block filter (replace every 12 months)
2 x B1034, 10" Big Blue Filter Housing Cartridge WH5 WH10 WH1134
1 x MK225, Maintenance kit for Honeywell RO9100 Filtercold RO5 AV180
1 x Parts, Ro Water System Installation Parts Bag 1/4"
1 x 721, Self-Piercing Valve, Feed Water Adapter for Copper Pipe
1 x O-RING RINGS FOR WH20 WHOLE HOUSE SYSTEM HOUSING BIG BLUE 20"
2 x 4044-K Male Elbow Fitting Compression type 1/4" OD 1/4" NPT
1 x NM-5102, HONEYWELL COUNTERTOP WATER FILTER *DISCONTINUED* SW1
1 x AMTU-0404 Male Tee Union Connector NPT Thread 1/4" Quick Connect
2 x OPTIONAL: 567 Filter Housing Wrench Case Opener WHOLE HOUSE WH
1 x .AR104H High Efficiency Membrane Aquarium Reef Aeroponics RO DI
1 x UC SHELL, Honeywell UC7000 Empty System Only No Filter
1 x Value Pack- Entire 3 Years of Replacement Filters Bundle RO6ALK
1 x 709C, Disc Shape Auto Shut Off Valve 4-way Four Way Valve
1 x 532wpg, PAE RO water pressure white tank bladder gauge valve 4G
1 x 365, 4th stage TFC 50/65 US membrane filter (replace 2-3 yrs)
1 x NM-5001C, HONEYWELL COUNTERTOP WATER FILTER *DISCONTINUED* SW1
1 x MKP, Maintenance kit for K5150P K6150P AR150P
1 x SV-110AC-14, Solenoid Valve 1/4" plastic 110VAC ESO
1 x 205 2nd stage solid carbon block filter (replace every 12 month)
1 x FHP2012, 20" long Filter Cartridge Casing Housing RO260 RD322
1 x CP-KOR24, O-RING Oring FOR KOOLERMAX MEMBRANE FILTER HOUSING
1 x 5th stage 225 Inline Alkaline filter with clear housing (annual)
1 x 1st stage SF05 sediment filter (replace every 6-12 months)
2 x 723, Feed Water Adapter with Ball Valve
1 x Value Pack- Entire 3 Years of Replacement Filters Bundle AR122
1 x FPK, High Quality Fitting and Connector 3/8" (Value-Pack)
2 x 532w, PAE RO Storage Pressure Osmosis Water Tank Container 4G
1 x 733, Built-in Pressure Gauge 0 to 150 psi for Koolermax RO syste
1 x 350UP, Upgrade Kit TFC50 gal/day (includes US membrane filter)
1 x SC207, Specialty Filter Refillable Color Changing DI Filter for
1 x SC445, Specialty Filter SPECIAL ALKALINE FILTER Specialty Filter
1 x NM-5103, HONEYWELL COUNTERTOP WATER FILTER *DISCONTINUED* SW1
1 x SVkit, Pump Shutoff Switch Kit for Aquatec Booster Pumps ESO TSO
1 x 205, 5th stage final carbon filter
1 x 673, Replacement UV Lamp Light for 602 (6 Watts)
1 x O-RING FOR WH10 WHOLE HOUSE SYSTEM HOUSING BIG BLUE 10" CANISTER
1 x SC412, Water Softening Filter Calcium Magnesium Hardness Removal

View Cart$4,511.13
Specials Log InCreate Account Checkout  Shopping Cart92 item(s)
1 x Value Pack- Entire 3 Years of Replacement Filters Bundle HK120
1 x 225, 5th stage Inline Alkaline filter with clear case (annual)
1 x 741-38, Diverter Valve for RO DI Water Systems
2 x 5th or 6th Stage IC21 inline carbon filter (every 6 to 12 mons)
2 x 4044-K qty 2 Male Elbow Fitting Compression type 1/4"
1 x 6th Stage pn215 Refillable inline DI filter (color change)
1 x Wrench 2 pcs 566 Standard Filter Housing Opener Double Better
1 x Optional 566 Filter Housing Wrench Case Opener KoolerMax System
2 x 205, 3rd stage solid carbon block filter (replace every 12month)
1 x 720, Feed Water Adapter with Needle Valve
1 x Special, Single Stage Housing Bracket Shell Connection Kit
1 x Value Pack- Entire 3 Years of Replacement Filters Bundle RD106
1 x CPR-150G, Pressure Regulator with Pressure Gauge (0-125 psi)
1 x Special, Output Conversion Kit Convert from 1/4" to 3/8"
1 x PSW-280 Aquatec Pressure Switch 80 psi shut off 1/4 tubing TSO
1 x Value Pack- Entire 3 Years of Replacement Filters Bundle K6ALK
1 x HK120 KoolerMax Aeroponics Hydroponics 150G RO Filtration System
1 x Value Pack- Entire 3 Years of Replacement Filters Bundle RO585
1 x KT-103, Optional Manual Membrane Flush Valve
1 x Value Pack- Entire 3 Years of Replacement Filters Bundle RD322
2 x 752, DC Booster Pump w/ Transformer
1 x 818, DI Resin Refill Bag 16oz (good for up to three refills)
2 x 752set, DC Booster Pump Transformer Solenoid Pressure Switch All
1 x 718TB12, Half Inch Tubing 20 feet 1/2" LLDPE PE White Tube
1 x bulk818, DI resin refill bags Di-Ionization media
1 x bulksf05, Koolermax Sediment Filter
3 x KM701, Special Koolermax Filter Housing Canister Casing 1/4 FPT
1 x Optional: 564 Membrane Filter Housing Wrench Opener
3 x 532b, PAE RO Water Storage Pressure Osmosis Tank Container 4G
2 x 213, 5th or 6th stage inline carbon filter (replace in 12 mons)
2 x CBV-0404, Tank Ball Valve to 1/4 tubing *standard RO tank size*
2 x EMT-10, Empty Filter Cartridge Casing Housing
1 x 1070, PAE LARGE RO Storage Pressure Tank 14 GALLON 14G
2 x Optional 5th or 6th Stage upgrade inline DI filter(color change)
1 x FPK, 6 pcs Fitting Pack Union Connector 1/4" quarter inch
1 x 6044-K Tee Fitting Compression Type 1/4"OD 1/4" NPT
1 x 205, 2nd stage carbon block filter (replace every 12 months)
2 x B1034, 10" Big Blue Filter Housing Cartridge WH5 WH10 WH1134
1 x MK225, Maintenance kit for Honeywell RO9100 Filtercold RO5 AV180
1 x Parts, Ro Water System Installation Parts Bag 1/4"
1 x 721, Self-Piercing Valve, Feed Water Adapter for Copper Pipe
1 x O-RING RINGS FOR WH20 WHOLE HOUSE SYSTEM HOUSING BIG BLUE 20"
2 x 4044-K Male Elbow Fitting Compression type 1/4" OD 1/4" NPT
1 x NM-5102, HONEYWELL COUNTERTOP WATER FILTER *DISCONTINUED* SW1
1 x AMTU-0404 Male Tee Union Connector NPT Thread 1/4" Quick Connect
2 x OPTIONAL: 567 Filter Housing Wrench Case Opener WHOLE HOUSE WH
1 x .AR104H High Efficiency Membrane Aquarium Reef Aeroponics RO DI
1 x UC SHELL, Honeywell UC7000 Empty System Only No Filter
1 x Value Pack- Entire 3 Years of Replacement Filters Bundle RO6ALK
1 x 709C, Disc Shape Auto Shut Off Valve 4-way Four Way Valve
1 x 532wpg, PAE RO water pressure white tank bladder gauge valve 4G
1 x 365, 4th stage TFC 50/65 US membrane filter (replace 2-3 yrs)
1 x NM-5001C, HONEYWELL COUNTERTOP WATER FILTER *DISCONTINUED* SW1
1 x MKP, Maintenance kit for K5150P K6150P AR150P
1 x SV-110AC-14, Solenoid Valve 1/4" plastic 110VAC ESO
1 x 205 2nd stage solid carbon block filter (replace every 12 month)
1 x FHP2012, 20" long Filter Cartridge Casing Housing RO260 RD322
1 x CP-KOR24, O-RING Oring FOR KOOLERMAX MEMBRANE FILTER HOUSING
1 x 5th stage 225 Inline Alkaline filter with clear housing (annual)
1 x 1st stage SF05 sediment filter (replace every 6-12 months)
2 x 723, Feed Water Adapter with Ball Valve
1 x Value Pack- Entire 3 Years of Replacement Filters Bundle AR122
1 x FPK, High Quality Fitting and Connector 3/8" (Value-Pack)
2 x 532w, PAE RO Storage Pressure Osmosis Water Tank Container 4G
1 x 733, Built-in Pressure Gauge 0 to 150 psi for Koolermax RO syste
1 x 350UP, Upgrade Kit TFC50 gal/day (includes US membrane filter)
1 x SC207, Specialty Filter Refillable Color Changing DI Filter for
1 x SC445, Specialty Filter SPECIAL ALKALINE FILTER Specialty Filter
1 x NM-5103, HONEYWELL COUNTERTOP WATER FILTER *DISCONTINUED* SW1
1 x SVkit, Pump Shutoff Switch Kit for Aquatec Booster Pumps ESO TSO
1 x 205, 5th stage final carbon filter
1 x 673, Replacement UV Lamp Light for 602 (6 Watts)
1 x O-RING FOR WH10 WHOLE HOUSE SYSTEM HOUSING BIG BLUE 10" CANISTER
1 x SC412, Water Softening Filter Calcium Magnesium Hardness Removal

View Cart$4,511.13

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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