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1 x 532bpg, PAE RO water pressure tank blue bladder gauge valve 4G
1 x KF310UP, SUBSTITUTE/Upgrade to KYTON FAUCET POLISHED CHROME FINI
1 x 532wpg, PAE RO water pressure white tank bladder gauge valve 4G
1 x BUNDLE PACK ANNUAL FILTER KIT FK3 WaterGeneral 102 150 (3 ITEMS)
1 x CKV0402, Blue color Elbow Check Valve Elbow Type
1 x *Discontinued* RO585A
1 x FPK, High Quality Fitting and Connector 3/8" (Value-Pack)
1 x .K5NTF KoolerMax K5 RO System Shell without tank and faucet
1 x KF355UP, SUBSTITUTE/Upgrade to Antique Brushed Brass Iron Finish
1 x MK800, Maintenance kit for AR122, AR125, HK120, RD150, RO155
1 x .K5 KoolerMax 75GPD 5 STAGE REVERSE OSMOSIS RO FILTER SYSTEM
1 x .K5150P, KoolerMax 150GPD 5 Stage RO System w/Booster Pump
1 x .AR150P, AQUARIUM & DRINKING 2 OUTPUTS Reverse Osmosis RO+DI+P
1 x 6044-combo Compression Type Fitting Elbow and Tee fitting
1 x .AR125 Dual Outputs Aquarium & Home Drinking RO Filter System
1 x 7044-K Union Tee Connector Fitting Compression type 1/4"
1 x 1044-K Male Connector 1/4 OD x 1/4 NPT Compression Fitting
1 x 1070, PAE LARGE RO Storage Pressure Tank 14 GALLON 14G
1 x .K6NTF KoolerMax K6ALK RO shell without tank and faucet
1 x *Discontinued* RO585NTF
1 x .K5150PNTF, KoolerMax K5150P RO System Shell without tank faucet
1 x 4044-K Male Elbow Fitting Compression type 1/4" OD 1/4" NPT
1 x 201, 1st stage sediment filter (replace every 6-12 months)
1 x *Discontinued* RO585
1 x Optional: 566 Filter Housing Wrench Opener WaterGeneral System
1 x 602, UV Ultra Violet Sterilization Light Bulb ystem (6 watts)
1 x .RO260 Aquarium 300G REVERSE OSMOSIS AEROPONICS HYDROPONICS RO
1 x KF511UP SUBSTITUTE/Upgrade Faucet CHROME GOLD TRIM CROSS HANDLE
1 x 205, 3rd stage solid carbon block filter (replace every 12month)
1 x .K6150PNTF, KoolerMax K6150P RO System Shell without tank faucet
1 x FPK, 6 pcs Fitting Pack Union Connector 1/2 x 3/8 inch
1 x FPK, 6 pcs Fitting Pack Union Connector 3/8 x 1/4 inch
1 x AMTU-0404 Male Tee Union Connector NPT Thread 1/4" Quick Connect
1 x KF612UP, SUBSTITUTE/Upgrade Faucet Oil Rubbed Bronze Fisnish
1 x Parts, Ro Water System Installation Parts Bag 1/4"
1 x 205 2nd stage solid carbon block filter (replace every 12 month)
1 x 532b, PAE RO Water Storage Pressure Osmosis Tank Container 4G
1 x 581, Ice Maker Hookup Kit Connect RO water to Fridge Ice Maker
1 x Optional: 564 Membrane Filter Housing Wrench Opener
1 x 4044-K qty 2 Male Elbow Fitting Compression type 1/4"
1 x FPK, 6 pcs Fitting Pack Union Connector 1/4" quarter inch
1 x CBV-38, Tank Ball Valve to 3/8 tubing
1 x 4064K Male Connector Elbow 3/8 OD Compression Fitting 1/4 NPT
1 x Value Pack- Entire 3 Years of Replacement Filters Bundle RO155
1 x .K6A KoolerMax 75GPD 6STAGE Alkaline pH REVERSE OSMOSIS RO FILTE
1 x CBV-0404, Tank Ball Valve to 1/4 tubing *standard RO tank size*
1 x *Discontinued* RO585ERP
1 x 4042-K Male Elbow Fitting Compression type(membrane housing use)
1 x 6044-K Tee Fitting Compression Type 1/4"OD 1/4" NPT
1 x .K6150P, KoolerMax 150GPD 6 Stage RO System w/ Booster Pump
1 x 701, FH1014 Filter Housing Chamber Casing White Color 1/4 FPT
1 x 3150, 4th stage TFC-150 US membrane filter (every 2-3 yrs)
1 x 532w, PAE RO Storage Pressure Osmosis Water Tank Container 4G
1 x FPK11, High Quality Fitting and Connector 1/4" (Value-Pack)
1 x KF320UP, SUBSTITUTE/Upgrade Faucet BRUSHED NICKEL STAINLESS STEE
1 x CP-OR35+701 O-RING FOR WATERGENERAL BOTTOM FILTER HOUSING CASING
1 x .AR125NTF KoolerMax AR125 RO System Shell without tank & faucet
1 x 531, PAE RO Storage Pressure Osmosis Water Tank Container 3G
1 x Wrench 2 pcs 566 Standard Filter Housing Opener Double Better
1 x 2542-K, Female Connector 1/4 OD 1/8 FNPT Compression Fitting
1 x KT-103, Optional Manual Membrane Flush Valve
1 x N-14-1M, Nipple Fitting connector between standard RO housing

View Cart$4,685.99
Specials Log InCreate Account Checkout  Shopping Cart62 item(s)
1 x 532bpg, PAE RO water pressure tank blue bladder gauge valve 4G
1 x KF310UP, SUBSTITUTE/Upgrade to KYTON FAUCET POLISHED CHROME FINI
1 x 532wpg, PAE RO water pressure white tank bladder gauge valve 4G
1 x BUNDLE PACK ANNUAL FILTER KIT FK3 WaterGeneral 102 150 (3 ITEMS)
1 x CKV0402, Blue color Elbow Check Valve Elbow Type
1 x *Discontinued* RO585A
1 x FPK, High Quality Fitting and Connector 3/8" (Value-Pack)
1 x .K5NTF KoolerMax K5 RO System Shell without tank and faucet
1 x KF355UP, SUBSTITUTE/Upgrade to Antique Brushed Brass Iron Finish
1 x MK800, Maintenance kit for AR122, AR125, HK120, RD150, RO155
1 x .K5 KoolerMax 75GPD 5 STAGE REVERSE OSMOSIS RO FILTER SYSTEM
1 x .K5150P, KoolerMax 150GPD 5 Stage RO System w/Booster Pump
1 x .AR150P, AQUARIUM & DRINKING 2 OUTPUTS Reverse Osmosis RO+DI+P
1 x 6044-combo Compression Type Fitting Elbow and Tee fitting
1 x .AR125 Dual Outputs Aquarium & Home Drinking RO Filter System
1 x 7044-K Union Tee Connector Fitting Compression type 1/4"
1 x 1044-K Male Connector 1/4 OD x 1/4 NPT Compression Fitting
1 x 1070, PAE LARGE RO Storage Pressure Tank 14 GALLON 14G
1 x .K6NTF KoolerMax K6ALK RO shell without tank and faucet
1 x *Discontinued* RO585NTF
1 x .K5150PNTF, KoolerMax K5150P RO System Shell without tank faucet
1 x 4044-K Male Elbow Fitting Compression type 1/4" OD 1/4" NPT
1 x 201, 1st stage sediment filter (replace every 6-12 months)
1 x *Discontinued* RO585
1 x Optional: 566 Filter Housing Wrench Opener WaterGeneral System
1 x 602, UV Ultra Violet Sterilization Light Bulb ystem (6 watts)
1 x .RO260 Aquarium 300G REVERSE OSMOSIS AEROPONICS HYDROPONICS RO
1 x KF511UP SUBSTITUTE/Upgrade Faucet CHROME GOLD TRIM CROSS HANDLE
1 x 205, 3rd stage solid carbon block filter (replace every 12month)
1 x .K6150PNTF, KoolerMax K6150P RO System Shell without tank faucet
1 x FPK, 6 pcs Fitting Pack Union Connector 1/2 x 3/8 inch
1 x FPK, 6 pcs Fitting Pack Union Connector 3/8 x 1/4 inch
1 x AMTU-0404 Male Tee Union Connector NPT Thread 1/4" Quick Connect
1 x KF612UP, SUBSTITUTE/Upgrade Faucet Oil Rubbed Bronze Fisnish
1 x Parts, Ro Water System Installation Parts Bag 1/4"
1 x 205 2nd stage solid carbon block filter (replace every 12 month)
1 x 532b, PAE RO Water Storage Pressure Osmosis Tank Container 4G
1 x 581, Ice Maker Hookup Kit Connect RO water to Fridge Ice Maker
1 x Optional: 564 Membrane Filter Housing Wrench Opener
1 x 4044-K qty 2 Male Elbow Fitting Compression type 1/4"
1 x FPK, 6 pcs Fitting Pack Union Connector 1/4" quarter inch
1 x CBV-38, Tank Ball Valve to 3/8 tubing
1 x 4064K Male Connector Elbow 3/8 OD Compression Fitting 1/4 NPT
1 x Value Pack- Entire 3 Years of Replacement Filters Bundle RO155
1 x .K6A KoolerMax 75GPD 6STAGE Alkaline pH REVERSE OSMOSIS RO FILTE
1 x CBV-0404, Tank Ball Valve to 1/4 tubing *standard RO tank size*
1 x *Discontinued* RO585ERP
1 x 4042-K Male Elbow Fitting Compression type(membrane housing use)
1 x 6044-K Tee Fitting Compression Type 1/4"OD 1/4" NPT
1 x .K6150P, KoolerMax 150GPD 6 Stage RO System w/ Booster Pump
1 x 701, FH1014 Filter Housing Chamber Casing White Color 1/4 FPT
1 x 3150, 4th stage TFC-150 US membrane filter (every 2-3 yrs)
1 x 532w, PAE RO Storage Pressure Osmosis Water Tank Container 4G
1 x FPK11, High Quality Fitting and Connector 1/4" (Value-Pack)
1 x KF320UP, SUBSTITUTE/Upgrade Faucet BRUSHED NICKEL STAINLESS STEE
1 x CP-OR35+701 O-RING FOR WATERGENERAL BOTTOM FILTER HOUSING CASING
1 x .AR125NTF KoolerMax AR125 RO System Shell without tank & faucet
1 x 531, PAE RO Storage Pressure Osmosis Water Tank Container 3G
1 x Wrench 2 pcs 566 Standard Filter Housing Opener Double Better
1 x 2542-K, Female Connector 1/4 OD 1/8 FNPT Compression Fitting
1 x KT-103, Optional Manual Membrane Flush Valve
1 x N-14-1M, Nipple Fitting connector between standard RO housing

View Cart$4,685.99

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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