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3 x 701, FH1014 Filter Housing Chamber Casing White Color 1/4 FPT
2 x 532b, PAE RO Water Storage Pressure Osmosis Tank Container 4G
1 x CPR-150G, Pressure Regulator with Pressure Gauge (0-125 psi)
2 x Optional 566 Filter Housing Wrench Case Opener KoolerMax System
1 x KF320, Elite Series: Brushed Nickel / Stainless Steel Faucet
2 x Parts, Ro Water System Installation Parts Bag 1/4"
1 x 213, 5th stage inline carbon postfilter (replace every 12months)
1 x Value Pack- Entire 3 Years of Replacement Filters Bundle K5
1 x .RO260 Aquarium 300G REVERSE OSMOSIS AEROPONICS HYDROPONICS RO
1 x PSW-3100 Aquatec Pressure Switch 100 psi shut off 3/8 tubing TSO
1 x Optional 5th or 6th Stage upgrade inline DI filter(color change)
2 x MK300, Maintenance kit for RO535, RO435, RO545, AR104H
2 x 225UP, 5th stage Inline Alkaline upgrade (includes media)
3 x Wrench 2 pcs 566 Standard Filter Housing Opener Double Better
1 x NM-5102, HONEYWELL COUNTERTOP WATER FILTER *DISCONTINUED* SW1
1 x .AR122 KoolerMax 6STAGE Aquarium Reef REVERSE OSMOSIS RODI WATER
2 x 532w, PAE RO Storage Pressure Osmosis Water Tank Container 4G
1 x KT-103, Optional Manual Membrane Flush Valve
1 x 6044-K Tee Fitting Compression Type 1/4"OD 1/4" NPT
1 x KF320UP, SUBSTITUTE/Upgrade Faucet BRUSHED NICKEL STAINLESS STEE
1 x TMR-AQT-68, Transformer Power Supply Aquatec TACS114-19EP for 68
1 x .K6A KoolerMax 75GPD 6STAGE Alkaline pH REVERSE OSMOSIS RO FILTE
1 x SET88 Aquatec 8852 AC Booster pump Solenoid ESO Pressure Switch
1 x 727, Feed Water Adapter 3/8" compression adapter 1/4" inline bal
1 x FPK, 6 pcs Fitting Pack Union Connector 1/4" quarter inch
1 x 1st stage SF05 sediment filter (replace every 6-12 months)
1 x 913, 5th stage inline carbon filter (every 12 months)
1 x PSW-360 Aquatec Pressure Switch 60 psi shut off 3/8" tubing TSO
1 x OPTIONAL: 567 Filter Housing Wrench Case Opener WHOLE HOUSE WH
1 x Annual Filter Kit Koolermax Series KPAK-4 Sediment Carbon Block
1 x PSW-240 Aquatec Pressure Switch 40 psi shut off 1/4" tubing TSO
1 x 3150, 4th stage TFC-150 US membrane filter (every 2-3 yrs)
1 x bulkc10, Koolermax Carbon Block Filter
1 x Value Pack- Entire 3 Years of Replacement Filters Bundle RO585
1 x 201, 1st stage sediment filter (replace every 6-12 months)
1 x SC207, Specialty Filter Refillable Color Changing DI Filter for
1 x 318, 4th stage TFC-18 US membrane filter (replace every 2-3 yrs)
1 x bulk205, Carbon Block Filter
1 x 205, 2nd stage carbon block filter (replace every 12 months)
1 x 759, Aquatec Demand Delivery Pump 5853-7E12-J524 Commercial 1.7G
1 x 745, AFAN0409 Female Garden Hose / Laundry Hose Adapter
1 x Bundle Filter KPAK-104bm Sediment Carbon DI Resin Membrane
1 x UU Clips Pair Membrane to Membrane, 2.5" to 2.5"
1 x PSW-260 Aquatec Pressure Switch 60 psi shut off 1/4" tubing TSO
1 x B2012, 20" Long Slim Filter Cartridge Housing RO260 RD322
1 x Optional: 566 Filter Housing Wrench Opener WaterGeneral System
1 x SC445, Specialty Filter SPECIAL ALKALINE FILTER Specialty Filter
1 x 818, DI Resin Refill Bag 16oz (good for up to three refills)
1 x 752, DC Booster Pump w/ Transformer
1 x FM60, STEEL BRACKET TRIPLE HOUSING 10" STANDARD FOR RO MOUNT
1 x bulksf05, Koolermax Sediment Filter
1 x Value Pack- Entire 3 Years of Replacement Filters Bundle RD102
1 x 277, SED1005BB Big Blue 5 micron sediment filter 10"
1 x 733, Built-in Pressure Gauge 0 to 150 psi for Koolermax RO syste
1 x SC412, Water Softening Filter Calcium Magnesium Hardness Removal

View Cart$3,403.20
Specials Log InCreate Account Checkout  Shopping Cart65 item(s)
3 x 701, FH1014 Filter Housing Chamber Casing White Color 1/4 FPT
2 x 532b, PAE RO Water Storage Pressure Osmosis Tank Container 4G
1 x CPR-150G, Pressure Regulator with Pressure Gauge (0-125 psi)
2 x Optional 566 Filter Housing Wrench Case Opener KoolerMax System
1 x KF320, Elite Series: Brushed Nickel / Stainless Steel Faucet
2 x Parts, Ro Water System Installation Parts Bag 1/4"
1 x 213, 5th stage inline carbon postfilter (replace every 12months)
1 x Value Pack- Entire 3 Years of Replacement Filters Bundle K5
1 x .RO260 Aquarium 300G REVERSE OSMOSIS AEROPONICS HYDROPONICS RO
1 x PSW-3100 Aquatec Pressure Switch 100 psi shut off 3/8 tubing TSO
1 x Optional 5th or 6th Stage upgrade inline DI filter(color change)
2 x MK300, Maintenance kit for RO535, RO435, RO545, AR104H
2 x 225UP, 5th stage Inline Alkaline upgrade (includes media)
3 x Wrench 2 pcs 566 Standard Filter Housing Opener Double Better
1 x NM-5102, HONEYWELL COUNTERTOP WATER FILTER *DISCONTINUED* SW1
1 x .AR122 KoolerMax 6STAGE Aquarium Reef REVERSE OSMOSIS RODI WATER
2 x 532w, PAE RO Storage Pressure Osmosis Water Tank Container 4G
1 x KT-103, Optional Manual Membrane Flush Valve
1 x 6044-K Tee Fitting Compression Type 1/4"OD 1/4" NPT
1 x KF320UP, SUBSTITUTE/Upgrade Faucet BRUSHED NICKEL STAINLESS STEE
1 x TMR-AQT-68, Transformer Power Supply Aquatec TACS114-19EP for 68
1 x .K6A KoolerMax 75GPD 6STAGE Alkaline pH REVERSE OSMOSIS RO FILTE
1 x SET88 Aquatec 8852 AC Booster pump Solenoid ESO Pressure Switch
1 x 727, Feed Water Adapter 3/8" compression adapter 1/4" inline bal
1 x FPK, 6 pcs Fitting Pack Union Connector 1/4" quarter inch
1 x 1st stage SF05 sediment filter (replace every 6-12 months)
1 x 913, 5th stage inline carbon filter (every 12 months)
1 x PSW-360 Aquatec Pressure Switch 60 psi shut off 3/8" tubing TSO
1 x OPTIONAL: 567 Filter Housing Wrench Case Opener WHOLE HOUSE WH
1 x Annual Filter Kit Koolermax Series KPAK-4 Sediment Carbon Block
1 x PSW-240 Aquatec Pressure Switch 40 psi shut off 1/4" tubing TSO
1 x 3150, 4th stage TFC-150 US membrane filter (every 2-3 yrs)
1 x bulkc10, Koolermax Carbon Block Filter
1 x Value Pack- Entire 3 Years of Replacement Filters Bundle RO585
1 x 201, 1st stage sediment filter (replace every 6-12 months)
1 x SC207, Specialty Filter Refillable Color Changing DI Filter for
1 x 318, 4th stage TFC-18 US membrane filter (replace every 2-3 yrs)
1 x bulk205, Carbon Block Filter
1 x 205, 2nd stage carbon block filter (replace every 12 months)
1 x 759, Aquatec Demand Delivery Pump 5853-7E12-J524 Commercial 1.7G
1 x 745, AFAN0409 Female Garden Hose / Laundry Hose Adapter
1 x Bundle Filter KPAK-104bm Sediment Carbon DI Resin Membrane
1 x UU Clips Pair Membrane to Membrane, 2.5" to 2.5"
1 x PSW-260 Aquatec Pressure Switch 60 psi shut off 1/4" tubing TSO
1 x B2012, 20" Long Slim Filter Cartridge Housing RO260 RD322
1 x Optional: 566 Filter Housing Wrench Opener WaterGeneral System
1 x SC445, Specialty Filter SPECIAL ALKALINE FILTER Specialty Filter
1 x 818, DI Resin Refill Bag 16oz (good for up to three refills)
1 x 752, DC Booster Pump w/ Transformer
1 x FM60, STEEL BRACKET TRIPLE HOUSING 10" STANDARD FOR RO MOUNT
1 x bulksf05, Koolermax Sediment Filter
1 x Value Pack- Entire 3 Years of Replacement Filters Bundle RD102
1 x 277, SED1005BB Big Blue 5 micron sediment filter 10"
1 x 733, Built-in Pressure Gauge 0 to 150 psi for Koolermax RO syste
1 x SC412, Water Softening Filter Calcium Magnesium Hardness Removal

View Cart$3,403.20

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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