Log In Log In  |  Checkout   |  95 item(s)
3 x 532w, PAE RO Storage Pressure Osmosis Water Tank Container 4G
3 x B2010, 20" Big Blue Filter Housing Cartridge WH20 WH25 WH250
2 x Wrench 2 pcs 566 Standard Filter Housing Opener Double Better
3 x 532b, PAE RO Water Storage Pressure Osmosis Tank Container 4G
1 x FM60, STEEL BRACKET TRIPLE HOUSING 10" STANDARD FOR RO MOUNT
1 x CKV0402, Blue color Elbow Check Valve Elbow Type
1 x FRQ850, Flow Restrictor 850ML / min
2 x Special, Output Conversion Kit Convert from 1/4" to 3/8"
1 x CBV-38, Tank Ball Valve to 3/8 tubing
2 x 701, FH1014 Filter Housing Chamber Casing White Color 1/4 FPT
1 x WT-bac, Water Testing Kit, Bacteria Test
1 x KM701, Special Koolermax Filter Housing Canister Casing 1/4 FPT
1 x FRQ200, Flow Restrictor 200ML / min
1 x SC209, Specialty Filter Nitrate Removal Filter
1 x TMR-25A, 2.5 AMP Transformer Power Supply Ballast for 8800 5853
1 x ERP1000 Aquatec Permeate Pump Reverse Osmosis RO System USA made
1 x 756SET, Aquatec Permeate Pump Reverse Osmosis System ERP1000
1 x 335UP, Upgrade Kit TFC 35 gal/day (includes US membrane filter)
1 x 7044-K Union Tee Connector Fitting Compression type 1/4"
1 x 913, 5th stage inline carbon filter (every 12 months)
1 x Conversion Kit, Convert Aquarium to Drinking RO Water System
1 x BUNDLE PACK Annual Filter Kit FK4 WaterGeneral 585 106 (4 ITEMS)
1 x 565, Digital Pressure Gauge Tester Monitor
2 x Optional: 566 Filter Housing Wrench Opener WaterGeneral System
1 x MK8002, Maintenance kit for double membrane system RD322 RO260
1 x SC412, Water Softening Filter Calcium Magnesium Hardness Removal
1 x 214, Clear Inline Filter Cartridge Empty Case
2 x SC435, Specialty Filter Arsenic / Fluoride Removal Filter
1 x 285, Big Blue SED2005BB 20" Sediment filter WH25 WH250 WH2201
1 x Special, Single Stage Housing Bracket Shell Connection Kit
1 x .K5 KoolerMax 75GPD 5 STAGE REVERSE OSMOSIS RO FILTER SYSTEM
1 x SC207, Specialty Filter Refillable Color Changing DI Filter for
2 x SC725, Specialty Filter Chloramines / Hydrogen Sulfide Removal
1 x PSW-380 Aquatec Pressure Switch 80 psi shut off 3/8" tubing TSO
1 x Aeroponics HighPressure Booster Pump Aquatec CDP5853 Transformer
1 x FPK, 6 pcs Fitting Pack Union Connector 1/4" quarter inch
2 x FK-BB20M3, Special Big Blue Filter Pack Bundle for WH350 WH-350
1 x 225, 5th stage Inline Alkaline filter with clear case (annual)
1 x FHP2012, 20" long Filter Cartridge Casing Housing RO260 RD322
1 x DM-2, Inline Dual TDS monitor (meter) for RO DI System DM2
1 x Value Pack- Entire 3 Years of Replacement Filters Bundle RO6ALK
1 x .K5NTF KoolerMax K5 RO System Shell without tank and faucet
1 x AQF-600-105, Flow Meter Panel Mount 1/2" MPT
1 x Optional: 564 Membrane Filter Housing Wrench Opener
1 x .AR125 Dual Outputs Aquarium & Home Drinking RO Filter System
1 x 532bpg, PAE RO water pressure tank blue bladder gauge valve 4G
1 x OPTIONAL: 567 Filter Housing Wrench Case Opener WHOLE HOUSE WH
1 x 385, 4th stage TFC 75/85 US membrane filter (every 2-3 yrs)
1 x 213, 5th stage inline carbon postfilter (replace every 12months)
1 x TMR-DC-1212, Transformer Power Supply for Delivery Demand Pump
1 x 673, Replacement UV Lamp Light for 602 (6 Watts)
1 x 205, 3rd stage solid carbon block filter (replace every 12month)
2 x UC SHELL, Honeywell UC7000 Empty System Only No Filter
1 x 718TB38, Tubing, 20 feet 3/8" white LLDPE PE for drinking water
1 x 324, 4th stage TFC-24 US membrane filter (replace every 2-3 yrs)
1 x B1034, 10" Big Blue Filter Housing Cartridge WH5 WH10 WH1134
1 x *Discontinued* RO585NTF
1 x ERP500 Aquatec Permeate Pump Reverse Osmosis RO System USA made
2 x SW SHELL, Countertop SW1 Empty System Only No Filter
1 x 578, TDS Water Quality Meter tds-3
1 x Special Filter Kit Koolermax dealer distribution kit
1 x PSW-3100 Aquatec Pressure Switch 100 psi shut off 3/8 tubing TSO
1 x CPR-150G, Pressure Regulator with Pressure Gauge (0-125 psi)
1 x CP-OR35+701 O-RING FOR WATERGENERAL BOTTOM FILTER HOUSING CASING
1 x FK-BB10K3, Big Blue Filter Pack Bundle for WH-1030 Whole House
1 x CBV-0404, Tank Ball Valve to 1/4 tubing *standard RO tank size*
1 x 215, 5th or 6th Stage Refillable inline DI filter (color change)
1 x 3/4" NPT Digiflow Digital Flow Meter count up total Water Gallon
1 x EMT-10, Empty Filter Cartridge Casing Housing
1 x FRQ550, Flow Restrictor 500 to 600ML / min
1 x CDP6800T110V, AQUATEC Booster Pump Transformer 6840-2J03-B224
1 x .AR125NTF KoolerMax AR125 RO System Shell without tank & faucet
1 x 799, Siphon Pump Drinking Water Liquid Fluid Oil Manual Trasfer
1 x SC445, Specialty Filter SPECIAL ALKALINE FILTER Specialty Filter
1 x 717, Tubing 15 feet 1/4" white tube LLDPE PE for drinking water
1 x 732, Inline Pressure Gauge 0 to 300 psi for RO filter system
1 x CDP8800, AQUATEC CDP8852-2J03-B424 Booster Pump Only Fitting
1 x CP-KOR24, O-RING Oring FOR KOOLERMAX MEMBRANE FILTER HOUSING
1 x 399, 4th stage TFC-100 US membrane filter (every 2-3 yrs)
1 x 201, 1st stage sediment filter (replace every 6-12 months)

View Cart$4,080.31
Specials Log InCreate Account Checkout  Shopping Cart95 item(s)
3 x 532w, PAE RO Storage Pressure Osmosis Water Tank Container 4G
3 x B2010, 20" Big Blue Filter Housing Cartridge WH20 WH25 WH250
2 x Wrench 2 pcs 566 Standard Filter Housing Opener Double Better
3 x 532b, PAE RO Water Storage Pressure Osmosis Tank Container 4G
1 x FM60, STEEL BRACKET TRIPLE HOUSING 10" STANDARD FOR RO MOUNT
1 x CKV0402, Blue color Elbow Check Valve Elbow Type
1 x FRQ850, Flow Restrictor 850ML / min
2 x Special, Output Conversion Kit Convert from 1/4" to 3/8"
1 x CBV-38, Tank Ball Valve to 3/8 tubing
2 x 701, FH1014 Filter Housing Chamber Casing White Color 1/4 FPT
1 x WT-bac, Water Testing Kit, Bacteria Test
1 x KM701, Special Koolermax Filter Housing Canister Casing 1/4 FPT
1 x FRQ200, Flow Restrictor 200ML / min
1 x SC209, Specialty Filter Nitrate Removal Filter
1 x TMR-25A, 2.5 AMP Transformer Power Supply Ballast for 8800 5853
1 x ERP1000 Aquatec Permeate Pump Reverse Osmosis RO System USA made
1 x 756SET, Aquatec Permeate Pump Reverse Osmosis System ERP1000
1 x 335UP, Upgrade Kit TFC 35 gal/day (includes US membrane filter)
1 x 7044-K Union Tee Connector Fitting Compression type 1/4"
1 x 913, 5th stage inline carbon filter (every 12 months)
1 x Conversion Kit, Convert Aquarium to Drinking RO Water System
1 x BUNDLE PACK Annual Filter Kit FK4 WaterGeneral 585 106 (4 ITEMS)
1 x 565, Digital Pressure Gauge Tester Monitor
2 x Optional: 566 Filter Housing Wrench Opener WaterGeneral System
1 x MK8002, Maintenance kit for double membrane system RD322 RO260
1 x SC412, Water Softening Filter Calcium Magnesium Hardness Removal
1 x 214, Clear Inline Filter Cartridge Empty Case
2 x SC435, Specialty Filter Arsenic / Fluoride Removal Filter
1 x 285, Big Blue SED2005BB 20" Sediment filter WH25 WH250 WH2201
1 x Special, Single Stage Housing Bracket Shell Connection Kit
1 x .K5 KoolerMax 75GPD 5 STAGE REVERSE OSMOSIS RO FILTER SYSTEM
1 x SC207, Specialty Filter Refillable Color Changing DI Filter for
2 x SC725, Specialty Filter Chloramines / Hydrogen Sulfide Removal
1 x PSW-380 Aquatec Pressure Switch 80 psi shut off 3/8" tubing TSO
1 x Aeroponics HighPressure Booster Pump Aquatec CDP5853 Transformer
1 x FPK, 6 pcs Fitting Pack Union Connector 1/4" quarter inch
2 x FK-BB20M3, Special Big Blue Filter Pack Bundle for WH350 WH-350
1 x 225, 5th stage Inline Alkaline filter with clear case (annual)
1 x FHP2012, 20" long Filter Cartridge Casing Housing RO260 RD322
1 x DM-2, Inline Dual TDS monitor (meter) for RO DI System DM2
1 x Value Pack- Entire 3 Years of Replacement Filters Bundle RO6ALK
1 x .K5NTF KoolerMax K5 RO System Shell without tank and faucet
1 x AQF-600-105, Flow Meter Panel Mount 1/2" MPT
1 x Optional: 564 Membrane Filter Housing Wrench Opener
1 x .AR125 Dual Outputs Aquarium & Home Drinking RO Filter System
1 x 532bpg, PAE RO water pressure tank blue bladder gauge valve 4G
1 x OPTIONAL: 567 Filter Housing Wrench Case Opener WHOLE HOUSE WH
1 x 385, 4th stage TFC 75/85 US membrane filter (every 2-3 yrs)
1 x 213, 5th stage inline carbon postfilter (replace every 12months)
1 x TMR-DC-1212, Transformer Power Supply for Delivery Demand Pump
1 x 673, Replacement UV Lamp Light for 602 (6 Watts)
1 x 205, 3rd stage solid carbon block filter (replace every 12month)
2 x UC SHELL, Honeywell UC7000 Empty System Only No Filter
1 x 718TB38, Tubing, 20 feet 3/8" white LLDPE PE for drinking water
1 x 324, 4th stage TFC-24 US membrane filter (replace every 2-3 yrs)
1 x B1034, 10" Big Blue Filter Housing Cartridge WH5 WH10 WH1134
1 x *Discontinued* RO585NTF
1 x ERP500 Aquatec Permeate Pump Reverse Osmosis RO System USA made
2 x SW SHELL, Countertop SW1 Empty System Only No Filter
1 x 578, TDS Water Quality Meter tds-3
1 x Special Filter Kit Koolermax dealer distribution kit
1 x PSW-3100 Aquatec Pressure Switch 100 psi shut off 3/8 tubing TSO
1 x CPR-150G, Pressure Regulator with Pressure Gauge (0-125 psi)
1 x CP-OR35+701 O-RING FOR WATERGENERAL BOTTOM FILTER HOUSING CASING
1 x FK-BB10K3, Big Blue Filter Pack Bundle for WH-1030 Whole House
1 x CBV-0404, Tank Ball Valve to 1/4 tubing *standard RO tank size*
1 x 215, 5th or 6th Stage Refillable inline DI filter (color change)
1 x 3/4" NPT Digiflow Digital Flow Meter count up total Water Gallon
1 x EMT-10, Empty Filter Cartridge Casing Housing
1 x FRQ550, Flow Restrictor 500 to 600ML / min
1 x CDP6800T110V, AQUATEC Booster Pump Transformer 6840-2J03-B224
1 x .AR125NTF KoolerMax AR125 RO System Shell without tank & faucet
1 x 799, Siphon Pump Drinking Water Liquid Fluid Oil Manual Trasfer
1 x SC445, Specialty Filter SPECIAL ALKALINE FILTER Specialty Filter
1 x 717, Tubing 15 feet 1/4" white tube LLDPE PE for drinking water
1 x 732, Inline Pressure Gauge 0 to 300 psi for RO filter system
1 x CDP8800, AQUATEC CDP8852-2J03-B424 Booster Pump Only Fitting
1 x CP-KOR24, O-RING Oring FOR KOOLERMAX MEMBRANE FILTER HOUSING
1 x 399, 4th stage TFC-100 US membrane filter (every 2-3 yrs)
1 x 201, 1st stage sediment filter (replace every 6-12 months)

View Cart$4,080.31

ATU TEE Union Connector Quick Connect QC Fitting [ATU]

$3.50

ATU TEE Union Connector Quick Connect QC Fitting



* ATU TEE Union Connector, Quick Connect

* Please choose size from the selection box below. Both numbers are tubing OD Outside Diameter. First number is Tee double side and second number is the single side. (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 1/4" Tube OD ATU0404
* 3/8" Tube OD x 1/4" Tube OD ATU0604
* 3/8" Tube OD x 3/8" Tube OD ATU0606
* 1/2" Tube OD x 3/8" Tube OD ATU0706
* 1/2" Tube OD x 1/2" Tube OD ATU0707


* 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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