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2 x Optional 225UP 5th stage Inline Alkaline upgrade(includes media)
2 x 701, FH1014 Filter Housing Chamber Casing White Color 1/4 FPT
1 x MK800, Maintenance kit for AR122, AR125, HK120, RD150, RO155
1 x O-RING RINGS FOR WH20 WHOLE HOUSE SYSTEM HOUSING BIG BLUE 20"
1 x N-14-1M, Nipple Fitting connector between standard RO housing
2 x 4th stage TFC150 US membrane filter (every 2-3 yrs)M150 P/N3150
1 x CBV-38, Tank Ball Valve to 3/8 tubing
1 x CBV-0404, Tank Ball Valve to 1/4 tubing *standard RO tank size*
1 x MK550, Maintenance kit for RO585, RD102, RD106, RO6, K5, K6
2 x 6044-K Tee Fitting Compression Type 1/4"OD 1/4" NPT
1 x WH-20, Whole House Water Treatment Carbon Block Filter System Bi
4 x 201, 1st stage sediment filter (replace every 6-12 months)
2 x Optional 566 Filter Housing Wrench Case Opener KoolerMax System
1 x Special, Single Stage Housing Bracket Shell Connection Kit
1 x 718TB38, Tubing, 20 feet 3/8" white LLDPE PE for drinking water
1 x FPK, 6 pcs Fitting Pack Union Connector 1/4" quarter inch
3 x 205 2nd stage solid carbon block filter (replace every 12 month)
1 x 205, 3rd stage solid carbon block filter (replace every 12month)
2 x Value Pack- Entire 3 Years of Replacement Filters Bundle K5
1 x Value Pack- Entire 3 Years of Replacement Filters Bundle AR125
3 x KM701C, Special Koolermax Filter Housing Canister Casing 1/4 FPT
2 x bulk213, Inline Carbon Filter
2 x 752set, DC Booster Pump Transformer Solenoid Pressure Switch All
7 x Optional: 564 Membrane Filter Housing Wrench Opener
1 x 723, Feed Water Adapter with Ball Valve
1 x 4th stage TFC 75/85 US membrane filter (every 2-3 yrs) M75
1 x 727, Feed Water Adapter 3/8" compression adapter 1/4" inline bal
1 x CP-KOR45, O RING FOR KOOLERMAX BOTTOM FILTER HOUSING CASING
1 x 709, Automatic Shut Off Valve 4-way Four Way Valve
2 x MK300, Maintenance kit for RO535, RO435, RO545, AR104H
1 x 213, 5th stage inline carbon postfilter (replace every 12months)
2 x 213, 5th or 6th stage inline carbon filter (replace in 12 mons)
4 x 2nd stage C10 carbon block filter (replace every 6-12 months)
1 x 718, Tubing 30 feet 1/4" white tube LLDPE PE for drinking water
1 x SC227, Specialty Filter Refillable Color Changing DI Filter 20"
2 x MK200, Maintenance kit for Rotek Systems RCT-103 and RTF-265
1 x UC7000 HONEYWELL UNDER THE COUNTER WATER FILTER (WHITE, LARGE)
1 x 5th stage 225 Inline Alkaline filter with clear housing (annual)
1 x 1st stage SF05 sediment filter (replace every 6-12 months)
3 x CP-OR35+701 O-RING FOR WATERGENERAL BOTTOM FILTER HOUSING CASING
1 x 7044-K Union Tee Connector Fitting Compression type 1/4"
1 x bulkc10, Koolermax Carbon Block Filter
2 x BBK20, Replacement Filter 20" Big Blue Whole House WH-2201 WH250
1 x KF320, Elite Series: Brushed Nickel / Stainless Steel Faucet
2 x bulk201, Sediment Filter
1 x bulk818, DI resin refill bags Di-Ionization media
1 x WS-150M, Whole House Water Softener
4 x 532b, PAE RO Water Storage Pressure Osmosis Tank Container 4G
3 x 5th or 6th Stage IC21 inline carbon filter (every 6 to 12 mons)
1 x B2012, 20" Long Slim Filter Cartridge Housing RO260 RD322
1 x 4064K Male Connector Elbow 3/8 OD Compression Fitting 1/4 NPT
1 x 316UP, Upgrade for CTA20 gal/day (includes US Membrane filter)
3 x OPTIONAL: 567 Filter Housing Wrench Case Opener WHOLE HOUSE WH
5 x Parts, Ro Water System Installation Parts Bag 1/4"
1 x KF511, Polished Chrome Cross-Handle with Gold Trim Faucet
1 x 532wpg, PAE RO water pressure white tank bladder gauge valve 4G
5 x Wrench 2 pcs 566 Standard Filter Housing Opener Double Better
2 x Value Pack- Entire 3 Years of Replacement Filters Bundle K6ALK
1 x 741-14, Diverter Valve for Countertop Water Units
1 x Special Filter Kit Koolermax dealer distribution kit
2 x NM-5102, HONEYWELL COUNTERTOP WATER FILTER *DISCONTINUED* SW1
4 x 733, Built-in Pressure Gauge 0 to 150 psi for Koolermax RO syste
2 x B1034, 10" Big Blue Filter Housing Cartridge WH5 WH10 WH1134
1 x 205, 3rd stage solid carbon block filter (replace every 12 month
2 x 290, CB2010BB Big Blue 20" Carbon Block Filter WH20 WH250 WH2201
1 x 718TB12, Half Inch Tubing 20 feet 1/2" LLDPE PE White Tube
2 x FPK, High Quality Fitting and Connector 3/8" (Value-Pack)
2 x 532w, PAE RO Storage Pressure Osmosis Water Tank Container 4G
2 x 6th Stage pn215 Refillable inline DI filter (color change)
2 x 706, Membrane Filter Casing Housing Assembly
2 x Annual Filter Kit Koolermax Series KPAK-4 Sediment Carbon Block
1 x 288, CB1010BB Big Blue Carbon Block Filter 20K-50K gal 10"
3 x B2010, 20" Big Blue Filter Housing Cartridge WH20 WH25 WH250
3 x 3rd stage C10 carbon block filter (replace every 6-12 months)
1 x 310, 2nd stage CTA 10 US Membrane filter (every 2-3 yrs)
1 x Value Pack- Entire 3 Years of Replacement Filters Bundle RD106
2 x KM701, Special Koolermax Filter Housing Canister Casing 1/4 FPT
2 x FPK, 6 pcs Fitting Pack Union Connector 1/2 x 3/8 inch
1 x FRQ850, Flow Restrictor 850ML / min
1 x FPK11, High Quality Fitting and Connector 1/4" (Value-Pack)
1 x Optional: 566 Filter Housing Wrench Opener WaterGeneral System
1 x 4044-K Male Elbow Fitting Compression type 1/4" OD 1/4" NPT
1 x 568,Heavy-Duty Filter Housing Wrench, HoneyWell or FilterCold
2 x 701C, FHC1014 Filter Housing Chamber Casing Clear Color 1/4 FPT
2 x NM-5001C, HONEYWELL COUNTERTOP WATER FILTER *DISCONTINUED* SW1
1 x Value Pack- Entire 3 Years of Replacement Filters Bundle RO155
1 x Value Pack- Entire 3 Years of Replacement Filters Bundle RO585
1 x 4th stage Optional Refill bag #818 DI Resin Refill Bag
1 x 335, 4th stage TFC 35/45 US membrane filter (every 2-3 years)
1 x 752, DC Booster Pump w/ Transformer
1 x 204, 2nd stage GAC filter (replace every 6-12 months)
1 x FHP2012, 20" long Filter Cartridge Casing Housing RO260 RD322
1 x Value Pack- Entire 3 Years of Replacement Filters Bundle HK120
1 x CP-KOR24, O-RING Oring FOR KOOLERMAX MEMBRANE FILTER HOUSING
1 x SC435, Specialty Filter Arsenic / Fluoride Removal Filter
2 x 673, Replacement UV Lamp Light for 602 (6 Watts)
2 x Optional 5th or 6th Stage upgrade inline DI filter(color change)
1 x NM-5104, HONEYWELL COUNTERTOP WATER FILTER *DISCONTINUED* SW1
1 x 5th Stage pn215 Refillable inline DI filter (color change)
1 x FK-BB10K3, Big Blue Filter Pack Bundle for WH-1030 Whole House
1 x BBK10, Replacement Filter Big Blue Whole House WH-1134
1 x Bundle Filter KPAK-104m Sediment Carbon Block DI Resin Membrane
2 x 4042-K Male Elbow Fitting Compression type(membrane housing use)
1 x 6044-combo Compression Type Fitting Elbow and Tee fitting
1 x Value Pack- Entire 3 Years of Replacement Filters Bundle AR122
1 x Annual Filter Kit Koolermax Series KPAK-3 Sediment Carbon Block
1 x CPR-150G, Pressure Regulator with Pressure Gauge (0-125 psi)
3 x 818, DI Resin Refill Bag 16oz (good for up to three refills)
1 x 581, Ice Maker Hookup Kit Connect RO water to Fridge Ice Maker
1 x SW SHELL, Countertop SW1 Empty System Only No Filter
1 x SC209, Specialty Filter Nitrate Removal Filter
1 x 532bpg, PAE RO water pressure tank blue bladder gauge valve 4G
1 x 214, Clear Inline Filter Cartridge Empty Case
2 x FPK, 6 pcs Fitting Pack Union Connector 3/8 x 1/4 inch
1 x 1070, PAE LARGE RO Storage Pressure Tank 14 GALLON 14G
1 x 2542-K, Female Connector 1/4 OD 1/8 FNPT Compression Fitting
2 x Special, Output Conversion Kit Convert from 1/4" to 3/8"
1 x 4044-K qty 2 Male Elbow Fitting Compression type 1/4"
1 x Value Pack- Entire 3 Years of Replacement Filters Bundle RD322
1 x .SW-1 COUNTERTOP WATER FILTER SYSTEM (WHITE HOUSING)
1 x WH-250, Whole House Water Treatment Sediment Carbon Filter Syste
2 x bulksf05, Koolermax Sediment Filter
1 x SC725, Specialty Filter Chloramines / Hydrogen Sulfide Removal
1 x WH-5, Whole House Water Treatment Sediment Filter System 10" Big
1 x 350UP, Upgrade Kit TFC50 gal/day (includes US membrane filter)
1 x MK225, Maintenance kit for Honeywell RO9100 Filtercold RO5 AV180
1 x FM60, STEEL BRACKET TRIPLE HOUSING 10" STANDARD FOR RO MOUNT
1 x NM-5103, HONEYWELL COUNTERTOP WATER FILTER *DISCONTINUED* SW1
1 x FRQ300, Flow Restrictor 300ML / min
1 x 4th Stage Color Changing DI Filter SC207 for AR-104H
1 x 721, Self-Piercing Valve, Feed Water Adapter for Copper Pipe
1 x 318, 4th stage TFC-18 US membrane filter (replace every 2-3 yrs)
1 x bulkic21, Koolermax Inline Carbon Filter
1 x KF355, Antique Brushed Brass / Iron Finish Drinking Water Faucet
1 x 1044-K Male Connector 1/4 OD x 1/4 NPT Compression Fitting
1 x KF310, Elite Series: Polish Chrome Drinking Water Faucet
1 x Value Pack- Entire 3 Years of Replacement Filters Bundle K5150P
1 x 718b Blue Color Tubing 24 feet 1/4" LLDPE PE tube drinking water
1 x BUNDLE PACK ANNUAL FILTER KIT FK3 WaterGeneral 102 150 (3 ITEMS)
1 x 550, Standard Chrome Steel Faucet with Spigot for Water Dispense
1 x 202,1 MICRON Sediment filter (replace every 6-12 month) SED1001

View Cart$12,554.61
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2 x Optional 225UP 5th stage Inline Alkaline upgrade(includes media)
2 x 701, FH1014 Filter Housing Chamber Casing White Color 1/4 FPT
1 x MK800, Maintenance kit for AR122, AR125, HK120, RD150, RO155
1 x O-RING RINGS FOR WH20 WHOLE HOUSE SYSTEM HOUSING BIG BLUE 20"
1 x N-14-1M, Nipple Fitting connector between standard RO housing
2 x 4th stage TFC150 US membrane filter (every 2-3 yrs)M150 P/N3150
1 x CBV-38, Tank Ball Valve to 3/8 tubing
1 x CBV-0404, Tank Ball Valve to 1/4 tubing *standard RO tank size*
1 x MK550, Maintenance kit for RO585, RD102, RD106, RO6, K5, K6
2 x 6044-K Tee Fitting Compression Type 1/4"OD 1/4" NPT
1 x WH-20, Whole House Water Treatment Carbon Block Filter System Bi
4 x 201, 1st stage sediment filter (replace every 6-12 months)
2 x Optional 566 Filter Housing Wrench Case Opener KoolerMax System
1 x Special, Single Stage Housing Bracket Shell Connection Kit
1 x 718TB38, Tubing, 20 feet 3/8" white LLDPE PE for drinking water
1 x FPK, 6 pcs Fitting Pack Union Connector 1/4" quarter inch
3 x 205 2nd stage solid carbon block filter (replace every 12 month)
1 x 205, 3rd stage solid carbon block filter (replace every 12month)
2 x Value Pack- Entire 3 Years of Replacement Filters Bundle K5
1 x Value Pack- Entire 3 Years of Replacement Filters Bundle AR125
3 x KM701C, Special Koolermax Filter Housing Canister Casing 1/4 FPT
2 x bulk213, Inline Carbon Filter
2 x 752set, DC Booster Pump Transformer Solenoid Pressure Switch All
7 x Optional: 564 Membrane Filter Housing Wrench Opener
1 x 723, Feed Water Adapter with Ball Valve
1 x 4th stage TFC 75/85 US membrane filter (every 2-3 yrs) M75
1 x 727, Feed Water Adapter 3/8" compression adapter 1/4" inline bal
1 x CP-KOR45, O RING FOR KOOLERMAX BOTTOM FILTER HOUSING CASING
1 x 709, Automatic Shut Off Valve 4-way Four Way Valve
2 x MK300, Maintenance kit for RO535, RO435, RO545, AR104H
1 x 213, 5th stage inline carbon postfilter (replace every 12months)
2 x 213, 5th or 6th stage inline carbon filter (replace in 12 mons)
4 x 2nd stage C10 carbon block filter (replace every 6-12 months)
1 x 718, Tubing 30 feet 1/4" white tube LLDPE PE for drinking water
1 x SC227, Specialty Filter Refillable Color Changing DI Filter 20"
2 x MK200, Maintenance kit for Rotek Systems RCT-103 and RTF-265
1 x UC7000 HONEYWELL UNDER THE COUNTER WATER FILTER (WHITE, LARGE)
1 x 5th stage 225 Inline Alkaline filter with clear housing (annual)
1 x 1st stage SF05 sediment filter (replace every 6-12 months)
3 x CP-OR35+701 O-RING FOR WATERGENERAL BOTTOM FILTER HOUSING CASING
1 x 7044-K Union Tee Connector Fitting Compression type 1/4"
1 x bulkc10, Koolermax Carbon Block Filter
2 x BBK20, Replacement Filter 20" Big Blue Whole House WH-2201 WH250
1 x KF320, Elite Series: Brushed Nickel / Stainless Steel Faucet
2 x bulk201, Sediment Filter
1 x bulk818, DI resin refill bags Di-Ionization media
1 x WS-150M, Whole House Water Softener
4 x 532b, PAE RO Water Storage Pressure Osmosis Tank Container 4G
3 x 5th or 6th Stage IC21 inline carbon filter (every 6 to 12 mons)
1 x B2012, 20" Long Slim Filter Cartridge Housing RO260 RD322
1 x 4064K Male Connector Elbow 3/8 OD Compression Fitting 1/4 NPT
1 x 316UP, Upgrade for CTA20 gal/day (includes US Membrane filter)
3 x OPTIONAL: 567 Filter Housing Wrench Case Opener WHOLE HOUSE WH
5 x Parts, Ro Water System Installation Parts Bag 1/4"
1 x KF511, Polished Chrome Cross-Handle with Gold Trim Faucet
1 x 532wpg, PAE RO water pressure white tank bladder gauge valve 4G
5 x Wrench 2 pcs 566 Standard Filter Housing Opener Double Better
2 x Value Pack- Entire 3 Years of Replacement Filters Bundle K6ALK
1 x 741-14, Diverter Valve for Countertop Water Units
1 x Special Filter Kit Koolermax dealer distribution kit
2 x NM-5102, HONEYWELL COUNTERTOP WATER FILTER *DISCONTINUED* SW1
4 x 733, Built-in Pressure Gauge 0 to 150 psi for Koolermax RO syste
2 x B1034, 10" Big Blue Filter Housing Cartridge WH5 WH10 WH1134
1 x 205, 3rd stage solid carbon block filter (replace every 12 month
2 x 290, CB2010BB Big Blue 20" Carbon Block Filter WH20 WH250 WH2201
1 x 718TB12, Half Inch Tubing 20 feet 1/2" LLDPE PE White Tube
2 x FPK, High Quality Fitting and Connector 3/8" (Value-Pack)
2 x 532w, PAE RO Storage Pressure Osmosis Water Tank Container 4G
2 x 6th Stage pn215 Refillable inline DI filter (color change)
2 x 706, Membrane Filter Casing Housing Assembly
2 x Annual Filter Kit Koolermax Series KPAK-4 Sediment Carbon Block
1 x 288, CB1010BB Big Blue Carbon Block Filter 20K-50K gal 10"
3 x B2010, 20" Big Blue Filter Housing Cartridge WH20 WH25 WH250
3 x 3rd stage C10 carbon block filter (replace every 6-12 months)
1 x 310, 2nd stage CTA 10 US Membrane filter (every 2-3 yrs)
1 x Value Pack- Entire 3 Years of Replacement Filters Bundle RD106
2 x KM701, Special Koolermax Filter Housing Canister Casing 1/4 FPT
2 x FPK, 6 pcs Fitting Pack Union Connector 1/2 x 3/8 inch
1 x FRQ850, Flow Restrictor 850ML / min
1 x FPK11, High Quality Fitting and Connector 1/4" (Value-Pack)
1 x Optional: 566 Filter Housing Wrench Opener WaterGeneral System
1 x 4044-K Male Elbow Fitting Compression type 1/4" OD 1/4" NPT
1 x 568,Heavy-Duty Filter Housing Wrench, HoneyWell or FilterCold
2 x 701C, FHC1014 Filter Housing Chamber Casing Clear Color 1/4 FPT
2 x NM-5001C, HONEYWELL COUNTERTOP WATER FILTER *DISCONTINUED* SW1
1 x Value Pack- Entire 3 Years of Replacement Filters Bundle RO155
1 x Value Pack- Entire 3 Years of Replacement Filters Bundle RO585
1 x 4th stage Optional Refill bag #818 DI Resin Refill Bag
1 x 335, 4th stage TFC 35/45 US membrane filter (every 2-3 years)
1 x 752, DC Booster Pump w/ Transformer
1 x 204, 2nd stage GAC filter (replace every 6-12 months)
1 x FHP2012, 20" long Filter Cartridge Casing Housing RO260 RD322
1 x Value Pack- Entire 3 Years of Replacement Filters Bundle HK120
1 x CP-KOR24, O-RING Oring FOR KOOLERMAX MEMBRANE FILTER HOUSING
1 x SC435, Specialty Filter Arsenic / Fluoride Removal Filter
2 x 673, Replacement UV Lamp Light for 602 (6 Watts)
2 x Optional 5th or 6th Stage upgrade inline DI filter(color change)
1 x NM-5104, HONEYWELL COUNTERTOP WATER FILTER *DISCONTINUED* SW1
1 x 5th Stage pn215 Refillable inline DI filter (color change)
1 x FK-BB10K3, Big Blue Filter Pack Bundle for WH-1030 Whole House
1 x BBK10, Replacement Filter Big Blue Whole House WH-1134
1 x Bundle Filter KPAK-104m Sediment Carbon Block DI Resin Membrane
2 x 4042-K Male Elbow Fitting Compression type(membrane housing use)
1 x 6044-combo Compression Type Fitting Elbow and Tee fitting
1 x Value Pack- Entire 3 Years of Replacement Filters Bundle AR122
1 x Annual Filter Kit Koolermax Series KPAK-3 Sediment Carbon Block
1 x CPR-150G, Pressure Regulator with Pressure Gauge (0-125 psi)
3 x 818, DI Resin Refill Bag 16oz (good for up to three refills)
1 x 581, Ice Maker Hookup Kit Connect RO water to Fridge Ice Maker
1 x SW SHELL, Countertop SW1 Empty System Only No Filter
1 x SC209, Specialty Filter Nitrate Removal Filter
1 x 532bpg, PAE RO water pressure tank blue bladder gauge valve 4G
1 x 214, Clear Inline Filter Cartridge Empty Case
2 x FPK, 6 pcs Fitting Pack Union Connector 3/8 x 1/4 inch
1 x 1070, PAE LARGE RO Storage Pressure Tank 14 GALLON 14G
1 x 2542-K, Female Connector 1/4 OD 1/8 FNPT Compression Fitting
2 x Special, Output Conversion Kit Convert from 1/4" to 3/8"
1 x 4044-K qty 2 Male Elbow Fitting Compression type 1/4"
1 x Value Pack- Entire 3 Years of Replacement Filters Bundle RD322
1 x .SW-1 COUNTERTOP WATER FILTER SYSTEM (WHITE HOUSING)
1 x WH-250, Whole House Water Treatment Sediment Carbon Filter Syste
2 x bulksf05, Koolermax Sediment Filter
1 x SC725, Specialty Filter Chloramines / Hydrogen Sulfide Removal
1 x WH-5, Whole House Water Treatment Sediment Filter System 10" Big
1 x 350UP, Upgrade Kit TFC50 gal/day (includes US membrane filter)
1 x MK225, Maintenance kit for Honeywell RO9100 Filtercold RO5 AV180
1 x FM60, STEEL BRACKET TRIPLE HOUSING 10" STANDARD FOR RO MOUNT
1 x NM-5103, HONEYWELL COUNTERTOP WATER FILTER *DISCONTINUED* SW1
1 x FRQ300, Flow Restrictor 300ML / min
1 x 4th Stage Color Changing DI Filter SC207 for AR-104H
1 x 721, Self-Piercing Valve, Feed Water Adapter for Copper Pipe
1 x 318, 4th stage TFC-18 US membrane filter (replace every 2-3 yrs)
1 x bulkic21, Koolermax Inline Carbon Filter
1 x KF355, Antique Brushed Brass / Iron Finish Drinking Water Faucet
1 x 1044-K Male Connector 1/4 OD x 1/4 NPT Compression Fitting
1 x KF310, Elite Series: Polish Chrome Drinking Water Faucet
1 x Value Pack- Entire 3 Years of Replacement Filters Bundle K5150P
1 x 718b Blue Color Tubing 24 feet 1/4" LLDPE PE tube drinking water
1 x BUNDLE PACK ANNUAL FILTER KIT FK3 WaterGeneral 102 150 (3 ITEMS)
1 x 550, Standard Chrome Steel Faucet with Spigot for Water Dispense
1 x 202,1 MICRON Sediment filter (replace every 6-12 month) SED1001

View Cart$12,554.61

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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