Log In Log In  |  Checkout   |  53 item(s)
1 x 316, 2nd stage CTA 16 US Membrane filter
1 x 578, TDS Water Quality Meter tds-3
3 x 201, 1st stage sediment filter (replace every 6-12 months)
1 x Optional 225UP 5th stage Inline Alkaline upgrade(includes media)
1 x B2010, 20" Big Blue Filter Housing Cartridge WH20 WH25 WH250
1 x 1044-K Male Connector 1/4 OD x 1/4 NPT Compression Fitting
1 x 701, FH1014 Filter Housing Chamber Casing White Color 1/4 FPT
1 x CP-OR35+701 O-RING FOR WATERGENERAL BOTTOM FILTER HOUSING CASING
1 x Optional: 566 Filter Housing Wrench Opener WaterGeneral System
1 x 3/4" NPT Digiflow Digital Flow Meter count up total Water Gallon
1 x .AR150P, AQUARIUM & DRINKING 2 OUTPUTS Reverse Osmosis RO+DI+P
1 x CBV-0404, Tank Ball Valve to 1/4 tubing *standard RO tank size*
1 x SC227, Specialty Filter Refillable Color Changing DI Filter 20"
1 x WT-bac, Water Testing Kit, Bacteria Test
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 AR125
3 x 532b, PAE RO Water Storage Pressure Osmosis Tank Container 4G
1 x Value Pack- Entire 3 Years of Replacement Filters Bundle K6150P
1 x Micro 1/4 NPT Digital Flow Meter count up total Water Liter LPM
1 x FM-6710M-88 1" Digital Flow Meter count up Total GPM 56" cable
1 x 213, 5th or 6th stage inline carbon filter (replace in 12 mons)
1 x AQF-600-102, Flow Meter Panel Mount 3/8" MPT
1 x Value Pack- Entire 3 Years of Replacement Filters Bundle K6ALK
1 x Value Pack- Entire 3 Years of Replacement Filters Bundle HK120
1 x FPK, 6 pcs Fitting Pack Union Connector 3/8 x 1/4 inch
1 x Value Pack- Entire 3 Years of Replacement Filters Bundle RD106
1 x *Discontinued* RO585
1 x .K6150P, KoolerMax 150GPD 6 Stage RO System w/ Booster Pump
1 x .K6A KoolerMax 75GPD 6STAGE Alkaline pH REVERSE OSMOSIS RO FILTE
1 x CBV-38, Tank Ball Valve to 3/8 tubing
1 x SC209, Specialty Filter Nitrate Removal Filter
1 x KF310UP, SUBSTITUTE/Upgrade to KYTON FAUCET POLISHED CHROME FINI
1 x bulksf05, Koolermax Sediment Filter
1 x 701C, FHC1014 Filter Housing Chamber Casing Clear Color 1/4 FPT
1 x N-14-1M, Nipple Fitting connector between standard RO housing
1 x 532bpg, PAE RO water pressure tank blue bladder gauge valve 4G
1 x 335, 4th stage TFC 35/45 US membrane filter (every 2-3 years)
1 x 818, DI Resin Refill Bag 16oz (good for up to three refills)
1 x Value Pack- Entire 3 Years of Replacement Filters Bundle RO6ALK
1 x Special, Single Stage Housing Bracket Shell Connection Kit
1 x FM-8100T, DigiFlow Digital Water Flow Rate Meter 56" cable
1 x bulk818, DI resin refill bags Di-Ionization media
1 x 2542-K, Female Connector 1/4 OD 1/8 FNPT Compression Fitting
1 x Special, Output Conversion Kit Convert from 1/4" to 3/8"
2 x 205, 3rd stage solid carbon block filter (replace every 12month)
1 x KF310, Elite Series: Polish Chrome Drinking Water Faucet
1 x bulk205, Carbon Block Filter
1 x 550, Standard Chrome Steel Faucet with Spigot for Water Filter,

View Cart$4,197.48
Specials Log InCreate Account Checkout  Shopping Cart53 item(s)
1 x 316, 2nd stage CTA 16 US Membrane filter
1 x 578, TDS Water Quality Meter tds-3
3 x 201, 1st stage sediment filter (replace every 6-12 months)
1 x Optional 225UP 5th stage Inline Alkaline upgrade(includes media)
1 x B2010, 20" Big Blue Filter Housing Cartridge WH20 WH25 WH250
1 x 1044-K Male Connector 1/4 OD x 1/4 NPT Compression Fitting
1 x 701, FH1014 Filter Housing Chamber Casing White Color 1/4 FPT
1 x CP-OR35+701 O-RING FOR WATERGENERAL BOTTOM FILTER HOUSING CASING
1 x Optional: 566 Filter Housing Wrench Opener WaterGeneral System
1 x 3/4" NPT Digiflow Digital Flow Meter count up total Water Gallon
1 x .AR150P, AQUARIUM & DRINKING 2 OUTPUTS Reverse Osmosis RO+DI+P
1 x CBV-0404, Tank Ball Valve to 1/4 tubing *standard RO tank size*
1 x SC227, Specialty Filter Refillable Color Changing DI Filter 20"
1 x WT-bac, Water Testing Kit, Bacteria Test
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 AR125
3 x 532b, PAE RO Water Storage Pressure Osmosis Tank Container 4G
1 x Value Pack- Entire 3 Years of Replacement Filters Bundle K6150P
1 x Micro 1/4 NPT Digital Flow Meter count up total Water Liter LPM
1 x FM-6710M-88 1" Digital Flow Meter count up Total GPM 56" cable
1 x 213, 5th or 6th stage inline carbon filter (replace in 12 mons)
1 x AQF-600-102, Flow Meter Panel Mount 3/8" MPT
1 x Value Pack- Entire 3 Years of Replacement Filters Bundle K6ALK
1 x Value Pack- Entire 3 Years of Replacement Filters Bundle HK120
1 x FPK, 6 pcs Fitting Pack Union Connector 3/8 x 1/4 inch
1 x Value Pack- Entire 3 Years of Replacement Filters Bundle RD106
1 x *Discontinued* RO585
1 x .K6150P, KoolerMax 150GPD 6 Stage RO System w/ Booster Pump
1 x .K6A KoolerMax 75GPD 6STAGE Alkaline pH REVERSE OSMOSIS RO FILTE
1 x CBV-38, Tank Ball Valve to 3/8 tubing
1 x SC209, Specialty Filter Nitrate Removal Filter
1 x KF310UP, SUBSTITUTE/Upgrade to KYTON FAUCET POLISHED CHROME FINI
1 x bulksf05, Koolermax Sediment Filter
1 x 701C, FHC1014 Filter Housing Chamber Casing Clear Color 1/4 FPT
1 x N-14-1M, Nipple Fitting connector between standard RO housing
1 x 532bpg, PAE RO water pressure tank blue bladder gauge valve 4G
1 x 335, 4th stage TFC 35/45 US membrane filter (every 2-3 years)
1 x 818, DI Resin Refill Bag 16oz (good for up to three refills)
1 x Value Pack- Entire 3 Years of Replacement Filters Bundle RO6ALK
1 x Special, Single Stage Housing Bracket Shell Connection Kit
1 x FM-8100T, DigiFlow Digital Water Flow Rate Meter 56" cable
1 x bulk818, DI resin refill bags Di-Ionization media
1 x 2542-K, Female Connector 1/4 OD 1/8 FNPT Compression Fitting
1 x Special, Output Conversion Kit Convert from 1/4" to 3/8"
2 x 205, 3rd stage solid carbon block filter (replace every 12month)
1 x KF310, Elite Series: Polish Chrome Drinking Water Faucet
1 x bulk205, Carbon Block Filter
1 x 550, Standard Chrome Steel Faucet with Spigot for Water Filter,

View Cart$4,197.48

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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