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1 x FRQ550, Flow Restrictor 500 to 600ML / min
1 x TMR-220V-2A Aquatec TACS234-48 Transformer Power Supply EuroPlug
1 x 745, AFAN0409 Female Garden Hose / Laundry Hose Adapter
1 x FRQ300, Flow Restrictor 300ML / min
1 x 4042-K Male Elbow Fitting Compression type(membrane housing use)
1 x CP-OR55, O-RING FOR MEMBRANE FILTER HOUSING WaterGeneral Systems
1 x 752, DC Booster Pump w/ Transformer
1 x SET68, AQUATEC 6840 AC Pump Set Solenoid ESO Pressure Switch SET
1 x AQUATEC CDP 8852-2J03-B424 Booster Pump 220V Euro Transformer
1 x PSW-360 Aquatec Pressure Switch 60 psi shut off 3/8" tubing TSO
1 x SET8855-300 Aquatec 5853 Booster Pump Assembly for 300GPD RO Sys
2 x 532bpg, PAE RO water pressure tank blue bladder gauge valve 4G
1 x SV-24DC-38-Brass KSD Solenoid Valve 3/8" brass 24V DC ESO
1 x ERP1000 Aquatec Permeate Pump Reverse Osmosis RO System USA made
1 x MK550, Maintenance kit for RO585, RD102, RD106, RO6, K5, K6
1 x AQUATEC 8852-2J03-B424 High Flow Booster Pump 110V Transformer
1 x BBK20, Replacement Filter 20" Big Blue Whole House WH-2201 WH250
1 x 741-14, Diverter Valve for Countertop Water Units
1 x Aeroponics HighPressure Booster Pump Aquatec CDP5853 Transformer
1 x PSW-3100 Aquatec Pressure Switch 100 psi shut off 3/8 tubing TSO
1 x MK225, Maintenance kit for Honeywell RO9100 Filtercold RO5 AV180
1 x 532w, PAE RO Storage Pressure Osmosis Water Tank Container 4G
1 x FM40, STEEL BRACKET DOUBLE HOUSING 10" STANDARD
1 x 205, 3rd stage solid carbon block filter (replace every 12 month
1 x 532b, PAE RO Water Storage Pressure Osmosis Tank Container 4G
1 x 214, Clear Inline Filter Cartridge Empty Case
1 x 717, Tubing 15 feet 1/4" white tube LLDPE PE for drinking water
1 x B1034, 10" Big Blue Filter Housing Cartridge WH5 WH10 WH1134
1 x DDP5800, Aquatec Demand Delivery Pump 5851-7E12 Increase Output
1 x TMR-220V-1A Aquatec TACS234-19 Transformer Power Supply EuroPlug
1 x SVkit, Pump Shutoff Switch Kit for Aquatec Booster Pumps ESO TSO
1 x TMR-DC-1212, Transformer Power Supply for Delivery Demand Pump
2 x CPR-150G, Pressure Regulator with Pressure Gauge (0-125 psi)
1 x SV-24AC-14, Solenoid Valve for Aquatec pump only 1/4" 24VAC ESO
1 x FRQ420, Flow Restrictor 420ML / min
1 x 4044-K qty 2 Male Elbow Fitting Compression type 1/4"
1 x 701C, FHC1014 Filter Housing Chamber Casing Clear Color 1/4 FPT
1 x FPK, 6 pcs Fitting Pack Union Connector 3/8 x 1/4 inch
1 x PSW-280 Aquatec Pressure Switch 80 psi shut off 1/4 tubing TSO
1 x 201, 1st stage sediment filter (replace every 6-12 months)
1 x MK200, Maintenance kit for Rotek Systems RCT-103 and RTF-265
1 x CP-OR35+701 O-RING FOR WATERGENERAL BOTTOM FILTER HOUSING CASING
1 x 752set, DC Booster Pump Transformer Solenoid Pressure Switch All
1 x FRQ200, Flow Restrictor 200ML / min
1 x DB40, DI Resin Refill Bag for DI210, RD322
1 x FPK, High Quality Fitting and Connector 3/8" (Value-Pack)
1 x 215, 5th or 6th Stage Refillable inline DI filter (color change)
1 x MK300, Maintenance kit for RO535, RO435, RO545, AR104H
1 x 316UP, Upgrade for CTA20 gal/day (includes US Membrane filter)
1 x 205, 3rd stage solid carbon block filter (replace every 12month)
1 x SET8855 Aquatec 5853 Booster Pump Assembly for Aeroponics System
1 x 213, 5th or 6th stage inline carbon filter (replace in 12 mons)
1 x PSW-380 Aquatec Pressure Switch 80 psi shut off 3/8" tubing TSO
1 x 205 2nd stage solid carbon block filter (replace every 12 month)
1 x NM-5102, HONEYWELL COUNTERTOP WATER FILTER *DISCONTINUED* SW1
1 x TMR-DC-2412, Transformer Power Supply for #752 Booster Pump
1 x 531, PAE RO Storage Pressure Osmosis Water Tank Container 3G
1 x B2012, 20" Long Slim Filter Cartridge Housing RO260 RD322
1 x CBV-0404, Tank Ball Valve to 1/4 tubing *standard RO tank size*
1 x PSW-350, Pressure Switch for RO Booster Pump 1/4" TSO
1 x FPK11, High Quality Fitting and Connector 1/4" (Value-Pack)
1 x PSW-240 Aquatec Pressure Switch 40 psi shut off 1/4" tubing TSO
1 x OPTIONAL: 567 Filter Housing Wrench Case Opener WHOLE HOUSE WH
1 x 755, Aquatec Demand Delivery Pump 5851-7E12-J574 Increase Output
1 x 310, 2nd stage CTA 10 US Membrane filter
1 x SV-24AC-38, KSD Solenoid Valve ESO 3/8" brass, 24V AC
1 x 718TB38, Tubing, 20 feet 3/8" white LLDPE PE for drinking water
1 x NM-5001C, HONEYWELL COUNTERTOP WATER FILTER *DISCONTINUED* SW1
1 x 285, Big Blue SED2005BB 20" Sediment filter WH25 WH250 WH2201
1 x 701, FH1014 Filter Housing Chamber Casing White Color 1/4 FPT
1 x NM-5104, HONEYWELL COUNTERTOP WATER FILTER *DISCONTINUED* SW1
1 x 799, Siphon Pump Drinking Water Liquid Fluid Oil Manual Trasfer
1 x Optional 5th or 6th Stage upgrade inline DI filter(color change)
1 x FRQ850, Flow Restrictor 850ML / min
1 x 733, Built-in Pressure Gauge 0 to 150 psi for Koolermax RO syste
1 x CDP6800T110V, AQUATEC Booster Pump Transformer 6840-2J03-B224
1 x TMR-AQT-2A, Transformer Power Supply Aquatec TACS114-48 for 8800
1 x UC7000 HONEYWELL UNDER THE COUNTER WATER FILTER (WHITE, LARGE)
1 x 721, Self-Piercing Valve, Feed Water Adapter for Copper Pipe
1 x CDP8800, AQUATEC CDP8852-2J03-B424 Booster Pump Only Fitting
1 x SV-24AC-14, Solenoid Valve ESO for Aquatec pump 1/4" wiring
1 x 718b Blue Color Tubing 24 feet 1/4" LLDPE PE tube drinking water
1 x FPK, 6 pcs Fitting Pack Union Connector 1/2 x 3/8 inch
1 x 709, Automatic Shut Off Valve 4-way Four Way Valve
1 x 673, Replacement UV Lamp Light for 602 (6 Watts)

View Cart$3,160.30
Specials Log InCreate Account Checkout  Shopping Cart87 item(s)
1 x FRQ550, Flow Restrictor 500 to 600ML / min
1 x TMR-220V-2A Aquatec TACS234-48 Transformer Power Supply EuroPlug
1 x 745, AFAN0409 Female Garden Hose / Laundry Hose Adapter
1 x FRQ300, Flow Restrictor 300ML / min
1 x 4042-K Male Elbow Fitting Compression type(membrane housing use)
1 x CP-OR55, O-RING FOR MEMBRANE FILTER HOUSING WaterGeneral Systems
1 x 752, DC Booster Pump w/ Transformer
1 x SET68, AQUATEC 6840 AC Pump Set Solenoid ESO Pressure Switch SET
1 x AQUATEC CDP 8852-2J03-B424 Booster Pump 220V Euro Transformer
1 x PSW-360 Aquatec Pressure Switch 60 psi shut off 3/8" tubing TSO
1 x SET8855-300 Aquatec 5853 Booster Pump Assembly for 300GPD RO Sys
2 x 532bpg, PAE RO water pressure tank blue bladder gauge valve 4G
1 x SV-24DC-38-Brass KSD Solenoid Valve 3/8" brass 24V DC ESO
1 x ERP1000 Aquatec Permeate Pump Reverse Osmosis RO System USA made
1 x MK550, Maintenance kit for RO585, RD102, RD106, RO6, K5, K6
1 x AQUATEC 8852-2J03-B424 High Flow Booster Pump 110V Transformer
1 x BBK20, Replacement Filter 20" Big Blue Whole House WH-2201 WH250
1 x 741-14, Diverter Valve for Countertop Water Units
1 x Aeroponics HighPressure Booster Pump Aquatec CDP5853 Transformer
1 x PSW-3100 Aquatec Pressure Switch 100 psi shut off 3/8 tubing TSO
1 x MK225, Maintenance kit for Honeywell RO9100 Filtercold RO5 AV180
1 x 532w, PAE RO Storage Pressure Osmosis Water Tank Container 4G
1 x FM40, STEEL BRACKET DOUBLE HOUSING 10" STANDARD
1 x 205, 3rd stage solid carbon block filter (replace every 12 month
1 x 532b, PAE RO Water Storage Pressure Osmosis Tank Container 4G
1 x 214, Clear Inline Filter Cartridge Empty Case
1 x 717, Tubing 15 feet 1/4" white tube LLDPE PE for drinking water
1 x B1034, 10" Big Blue Filter Housing Cartridge WH5 WH10 WH1134
1 x DDP5800, Aquatec Demand Delivery Pump 5851-7E12 Increase Output
1 x TMR-220V-1A Aquatec TACS234-19 Transformer Power Supply EuroPlug
1 x SVkit, Pump Shutoff Switch Kit for Aquatec Booster Pumps ESO TSO
1 x TMR-DC-1212, Transformer Power Supply for Delivery Demand Pump
2 x CPR-150G, Pressure Regulator with Pressure Gauge (0-125 psi)
1 x SV-24AC-14, Solenoid Valve for Aquatec pump only 1/4" 24VAC ESO
1 x FRQ420, Flow Restrictor 420ML / min
1 x 4044-K qty 2 Male Elbow Fitting Compression type 1/4"
1 x 701C, FHC1014 Filter Housing Chamber Casing Clear Color 1/4 FPT
1 x FPK, 6 pcs Fitting Pack Union Connector 3/8 x 1/4 inch
1 x PSW-280 Aquatec Pressure Switch 80 psi shut off 1/4 tubing TSO
1 x 201, 1st stage sediment filter (replace every 6-12 months)
1 x MK200, Maintenance kit for Rotek Systems RCT-103 and RTF-265
1 x CP-OR35+701 O-RING FOR WATERGENERAL BOTTOM FILTER HOUSING CASING
1 x 752set, DC Booster Pump Transformer Solenoid Pressure Switch All
1 x FRQ200, Flow Restrictor 200ML / min
1 x DB40, DI Resin Refill Bag for DI210, RD322
1 x FPK, High Quality Fitting and Connector 3/8" (Value-Pack)
1 x 215, 5th or 6th Stage Refillable inline DI filter (color change)
1 x MK300, Maintenance kit for RO535, RO435, RO545, AR104H
1 x 316UP, Upgrade for CTA20 gal/day (includes US Membrane filter)
1 x 205, 3rd stage solid carbon block filter (replace every 12month)
1 x SET8855 Aquatec 5853 Booster Pump Assembly for Aeroponics System
1 x 213, 5th or 6th stage inline carbon filter (replace in 12 mons)
1 x PSW-380 Aquatec Pressure Switch 80 psi shut off 3/8" tubing TSO
1 x 205 2nd stage solid carbon block filter (replace every 12 month)
1 x NM-5102, HONEYWELL COUNTERTOP WATER FILTER *DISCONTINUED* SW1
1 x TMR-DC-2412, Transformer Power Supply for #752 Booster Pump
1 x 531, PAE RO Storage Pressure Osmosis Water Tank Container 3G
1 x B2012, 20" Long Slim Filter Cartridge Housing RO260 RD322
1 x CBV-0404, Tank Ball Valve to 1/4 tubing *standard RO tank size*
1 x PSW-350, Pressure Switch for RO Booster Pump 1/4" TSO
1 x FPK11, High Quality Fitting and Connector 1/4" (Value-Pack)
1 x PSW-240 Aquatec Pressure Switch 40 psi shut off 1/4" tubing TSO
1 x OPTIONAL: 567 Filter Housing Wrench Case Opener WHOLE HOUSE WH
1 x 755, Aquatec Demand Delivery Pump 5851-7E12-J574 Increase Output
1 x 310, 2nd stage CTA 10 US Membrane filter
1 x SV-24AC-38, KSD Solenoid Valve ESO 3/8" brass, 24V AC
1 x 718TB38, Tubing, 20 feet 3/8" white LLDPE PE for drinking water
1 x NM-5001C, HONEYWELL COUNTERTOP WATER FILTER *DISCONTINUED* SW1
1 x 285, Big Blue SED2005BB 20" Sediment filter WH25 WH250 WH2201
1 x 701, FH1014 Filter Housing Chamber Casing White Color 1/4 FPT
1 x NM-5104, HONEYWELL COUNTERTOP WATER FILTER *DISCONTINUED* SW1
1 x 799, Siphon Pump Drinking Water Liquid Fluid Oil Manual Trasfer
1 x Optional 5th or 6th Stage upgrade inline DI filter(color change)
1 x FRQ850, Flow Restrictor 850ML / min
1 x 733, Built-in Pressure Gauge 0 to 150 psi for Koolermax RO syste
1 x CDP6800T110V, AQUATEC Booster Pump Transformer 6840-2J03-B224
1 x TMR-AQT-2A, Transformer Power Supply Aquatec TACS114-48 for 8800
1 x UC7000 HONEYWELL UNDER THE COUNTER WATER FILTER (WHITE, LARGE)
1 x 721, Self-Piercing Valve, Feed Water Adapter for Copper Pipe
1 x CDP8800, AQUATEC CDP8852-2J03-B424 Booster Pump Only Fitting
1 x SV-24AC-14, Solenoid Valve ESO for Aquatec pump 1/4" wiring
1 x 718b Blue Color Tubing 24 feet 1/4" LLDPE PE tube drinking water
1 x FPK, 6 pcs Fitting Pack Union Connector 1/2 x 3/8 inch
1 x 709, Automatic Shut Off Valve 4-way Four Way Valve
1 x 673, Replacement UV Lamp Light for 602 (6 Watts)

View Cart$3,160.30

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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