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2 x 277, SED1005BB Big Blue 5 micron sediment filter 10"
1 x UU Clips Pair Membrane to Filter, 2.5" to 2"
3 x 1st stage SF05 sediment filter (replace every 6-12 months)
3 x 4044-K Male Elbow Fitting Compression type 1/4" OD 1/4" NPT
1 x Y3414BR, Garden Hose Y Adapter Shutoff Valve Brass Construction
1 x 326, 3rd stage TFC 24 /26 US membrane filter (replace 2-3 yrs)
5 x 532w, PAE RO Storage Pressure Osmosis Water Tank Container 4G
1 x 709C, Disc Shape Auto Shut Off Valve 4-way Four Way Valve
4 x Optional: 564 Membrane Filter Housing Wrench Opener
1 x KF612, Elite Series: Oil Rubbed Bronze ORB Drinking Water Faucet
1 x PSW-3100 Aquatec Pressure Switch 100 psi shut off 3/8 tubing TSO
1 x B2012, 20" Long Slim Filter Cartridge Housing RO260 RD322
1 x 718TB12, Half Inch Tubing 20 feet 1/2" LLDPE PE White Tube
1 x WSACF-150T, Whole House Water Treatment ACF-150T
1 x TMR-DC-1212, Transformer Power Supply for Delivery Demand Pump
1 x 723, Feed Water Adapter with Ball Valve
1 x AQF-600-102, Flow Meter Panel Mount 3/8" MPT
3 x Wrench 2 pcs 566 Standard Filter Housing Opener Double Better
1 x AMTU-0404 Male Tee Union Connector NPT Thread 1/4" Quick Connect
1 x Special Filter Kit Koolermax dealer distribution kit
1 x NM-5001C, HONEYWELL COUNTERTOP WATER FILTER *DISCONTINUED* SW1
2 x MK300, Maintenance kit for RO535, RO435, RO545, AR104H
1 x 721, Self-Piercing Valve, Feed Water Adapter for Copper Pipe
4 x KM701C, Special Koolermax Filter Housing Canister Casing 1/4 FPT
1 x 720, Feed Water Adapter with Needle Valve
1 x 2.CB2010, 2nd stage carbon block filter 20" inch for RD322 RO260
1 x SVkit, Pump Shutoff Switch Kit for Aquatec Booster Pumps ESO TSO
1 x 316UP, Upgrade for CTA20 gal/day (includes US Membrane filter)
1 x 531, PAE RO Storage Pressure Osmosis Water Tank Container 3G
1 x FV-15, Bobby Float Valve Top Mount RM292P-N UNS CEL NSF USA
2 x Special, Output Conversion Kit Convert from 1/4" to 3/8"
2 x 213, 5th or 6th stage inline carbon filter (replace in 12 mons)
1 x FK-BB10K3, Big Blue Filter Pack Bundle for WH-1030 Whole House
1 x PSW-260 Aquatec Pressure Switch 60 psi shut off 1/4" tubing TSO
1 x ERP1000 Aquatec Permeate Pump Reverse Osmosis RO System USA made
2 x BUNDLE PACK ANNUAL FILTER KIT FK3 WaterGeneral 102 150 (3 ITEMS)
1 x FM-8100TG44, DigiFlow Digital Water Flow Rate Meter
1 x Aeroponics HighPressure Booster Pump Aquatec CDP5853 Transformer
1 x 718b Blue Color Tubing 24 feet 1/4" LLDPE PE tube drinking water
1 x SW SHELL, Countertop SW1 Empty System Only No Filter
1 x Value Pack- Entire 3 Years of Replacement Filters Bundle AR122
2 x 2nd stage C10 carbon block filter (replace every 6-12 months)
1 x 4th stage Optional Refill bag #818 DI Resin Refill Bag
1 x FV-14, Bobby Float Valve Side Mount RM292-12-N NSF USA
1 x B1034, 10" Big Blue Filter Housing Cartridge WH5 WH10 WH1134
1 x 290, CB2010BB Big Blue 20" Carbon Block Filter WH20 WH250 WH2201
1 x SV-24AC-14, Solenoid Valve ESO for Aquatec pump 1/4" wiring
1 x 701, FH1014 Filter Housing Chamber Casing White Color 1/4 FPT
1 x O-RING FOR WH10 WHOLE HOUSE SYSTEM HOUSING BIG BLUE 10" CANISTER
1 x 5th or 6th Stage IC21 inline carbon filter (every 6 to 12 mons)
1 x 213, 4th stage inline carbon filter (replace every 12 months)
1 x 6044-combo Compression Type Fitting Elbow and Tee fitting
1 x 732, Inline Pressure Gauge 0 to 300 psi for RO filter system
1 x 205, 5th stage final carbon filter
1 x FPK11, High Quality Fitting and Connector 1/4" (Value-Pack)
1 x WH-10, Whole House Water Treatment Carbon Filter System 10" Big
1 x PSW-2100 Aquatec Pressure Switch 100 psi shut off 1/4 tubing TSO
2 x 204, 2nd stage GAC filter (replace every 6-12 months)
1 x 4042-K Male Elbow Fitting Compression type(membrane housing use)
1 x TMR-AQT-2A, Transformer Power Supply Aquatec TACS114-48 for 8800
1 x 6th Stage pn215 Refillable inline DI filter (color change)
1 x CDP8800, AQUATEC CDP8852-2J03-B424 Booster Pump Only Fitting
1 x 818, DI Resin Refill Bag 16oz (good for up to three refills)
1 x Liter Digiflow 1/4NPT Digital Flow Meter count up total Water
1 x 205, 2nd stage carbon block filter (replace every 12 months)
1 x Special, Single Stage Housing Bracket Shell Connection Kit
1 x AQUATEC 8852-2J03-B424 High Flow Booster Pump 110V Transformer
1 x Parts, Ro Water System Installation Parts Bag 1/4"
2 x 205, 3rd stage solid carbon block filter (replace every 12month)
4 x Optional 566 Filter Housing Wrench Case Opener KoolerMax System
1 x 718, Tubing 30 feet 1/4" white tube LLDPE PE for drinking water
2 x Optional 225UP 5th stage Inline Alkaline upgrade(includes media)
1 x SV-24AC-14, Solenoid Valve for Aquatec pump only 1/4" 24VAC ESO
1 x MK800, Maintenance kit for AR122, AR125, HK120, RD150, RO155
2 x 3150, 4th stage TFC-150 US membrane filter (every 2-3 yrs)
1 x CPR-150G, Pressure Regulator with Pressure Gauge (0-125 psi)
1 x WT-bac, Water Testing Kit, Bacteria Test
2 x Optional: 566 Filter Housing Wrench Opener WaterGeneral System
1 x PSW-360 Aquatec Pressure Switch 60 psi shut off 3/8" tubing TSO
1 x ERP500 Aquatec Permeate Pump Reverse Osmosis RO System USA made
1 x MKP, Maintenance kit for K5150P K6150P AR150P
1 x 318, 4th stage TFC-18 US membrane filter (replace every 2-3 yrs)
2 x PSW-340 Aquatec Pressure Switch 40 psi shut off 3/8" tubing TSO
1 x 741-38, Diverter Valve for RO DI Water Systems
1 x O-RING RINGS FOR WH20 WHOLE HOUSE SYSTEM HOUSING BIG BLUE 20"
1 x FKD-66, Replacement Filter Pack SED2005 CB2010 DB40 for RD322
1 x 602, UV Ultra Violet Sterilization Light Bulb ystem (6 watts)
1 x 3rd stage C10 carbon block filter (replace every 6-12 months)
1 x 285, Big Blue SED2005BB 20" Sediment filter WH25 WH250 WH2201
1 x SC412, Water Softening Filter Calcium Magnesium Hardness Removal
1 x 752set, DC Booster Pump Transformer Solenoid Pressure Switch All
1 x 7044-K Union Tee Connector Fitting Compression type 1/4"
1 x 701C, FHC1014 Filter Housing Chamber Casing Clear Color 1/4 FPT
1 x SC209, Specialty Filter Nitrate Removal Filter
1 x 671C, Replacement UV Lamp Light for 609C (16 Watt)
1 x TMR-UV-6W, Replacement UV Ballast Transformer 6 Watts for 602 UV

View Cart$6,157.36
Specials Log InCreate Account Checkout  Shopping Cart127 item(s)
2 x 277, SED1005BB Big Blue 5 micron sediment filter 10"
1 x UU Clips Pair Membrane to Filter, 2.5" to 2"
3 x 1st stage SF05 sediment filter (replace every 6-12 months)
3 x 4044-K Male Elbow Fitting Compression type 1/4" OD 1/4" NPT
1 x Y3414BR, Garden Hose Y Adapter Shutoff Valve Brass Construction
1 x 326, 3rd stage TFC 24 /26 US membrane filter (replace 2-3 yrs)
5 x 532w, PAE RO Storage Pressure Osmosis Water Tank Container 4G
1 x 709C, Disc Shape Auto Shut Off Valve 4-way Four Way Valve
4 x Optional: 564 Membrane Filter Housing Wrench Opener
1 x KF612, Elite Series: Oil Rubbed Bronze ORB Drinking Water Faucet
1 x PSW-3100 Aquatec Pressure Switch 100 psi shut off 3/8 tubing TSO
1 x B2012, 20" Long Slim Filter Cartridge Housing RO260 RD322
1 x 718TB12, Half Inch Tubing 20 feet 1/2" LLDPE PE White Tube
1 x WSACF-150T, Whole House Water Treatment ACF-150T
1 x TMR-DC-1212, Transformer Power Supply for Delivery Demand Pump
1 x 723, Feed Water Adapter with Ball Valve
1 x AQF-600-102, Flow Meter Panel Mount 3/8" MPT
3 x Wrench 2 pcs 566 Standard Filter Housing Opener Double Better
1 x AMTU-0404 Male Tee Union Connector NPT Thread 1/4" Quick Connect
1 x Special Filter Kit Koolermax dealer distribution kit
1 x NM-5001C, HONEYWELL COUNTERTOP WATER FILTER *DISCONTINUED* SW1
2 x MK300, Maintenance kit for RO535, RO435, RO545, AR104H
1 x 721, Self-Piercing Valve, Feed Water Adapter for Copper Pipe
4 x KM701C, Special Koolermax Filter Housing Canister Casing 1/4 FPT
1 x 720, Feed Water Adapter with Needle Valve
1 x 2.CB2010, 2nd stage carbon block filter 20" inch for RD322 RO260
1 x SVkit, Pump Shutoff Switch Kit for Aquatec Booster Pumps ESO TSO
1 x 316UP, Upgrade for CTA20 gal/day (includes US Membrane filter)
1 x 531, PAE RO Storage Pressure Osmosis Water Tank Container 3G
1 x FV-15, Bobby Float Valve Top Mount RM292P-N UNS CEL NSF USA
2 x Special, Output Conversion Kit Convert from 1/4" to 3/8"
2 x 213, 5th or 6th stage inline carbon filter (replace in 12 mons)
1 x FK-BB10K3, Big Blue Filter Pack Bundle for WH-1030 Whole House
1 x PSW-260 Aquatec Pressure Switch 60 psi shut off 1/4" tubing TSO
1 x ERP1000 Aquatec Permeate Pump Reverse Osmosis RO System USA made
2 x BUNDLE PACK ANNUAL FILTER KIT FK3 WaterGeneral 102 150 (3 ITEMS)
1 x FM-8100TG44, DigiFlow Digital Water Flow Rate Meter
1 x Aeroponics HighPressure Booster Pump Aquatec CDP5853 Transformer
1 x 718b Blue Color Tubing 24 feet 1/4" LLDPE PE tube drinking water
1 x SW SHELL, Countertop SW1 Empty System Only No Filter
1 x Value Pack- Entire 3 Years of Replacement Filters Bundle AR122
2 x 2nd stage C10 carbon block filter (replace every 6-12 months)
1 x 4th stage Optional Refill bag #818 DI Resin Refill Bag
1 x FV-14, Bobby Float Valve Side Mount RM292-12-N NSF USA
1 x B1034, 10" Big Blue Filter Housing Cartridge WH5 WH10 WH1134
1 x 290, CB2010BB Big Blue 20" Carbon Block Filter WH20 WH250 WH2201
1 x SV-24AC-14, Solenoid Valve ESO for Aquatec pump 1/4" wiring
1 x 701, FH1014 Filter Housing Chamber Casing White Color 1/4 FPT
1 x O-RING FOR WH10 WHOLE HOUSE SYSTEM HOUSING BIG BLUE 10" CANISTER
1 x 5th or 6th Stage IC21 inline carbon filter (every 6 to 12 mons)
1 x 213, 4th stage inline carbon filter (replace every 12 months)
1 x 6044-combo Compression Type Fitting Elbow and Tee fitting
1 x 732, Inline Pressure Gauge 0 to 300 psi for RO filter system
1 x 205, 5th stage final carbon filter
1 x FPK11, High Quality Fitting and Connector 1/4" (Value-Pack)
1 x WH-10, Whole House Water Treatment Carbon Filter System 10" Big
1 x PSW-2100 Aquatec Pressure Switch 100 psi shut off 1/4 tubing TSO
2 x 204, 2nd stage GAC filter (replace every 6-12 months)
1 x 4042-K Male Elbow Fitting Compression type(membrane housing use)
1 x TMR-AQT-2A, Transformer Power Supply Aquatec TACS114-48 for 8800
1 x 6th Stage pn215 Refillable inline DI filter (color change)
1 x CDP8800, AQUATEC CDP8852-2J03-B424 Booster Pump Only Fitting
1 x 818, DI Resin Refill Bag 16oz (good for up to three refills)
1 x Liter Digiflow 1/4NPT Digital Flow Meter count up total Water
1 x 205, 2nd stage carbon block filter (replace every 12 months)
1 x Special, Single Stage Housing Bracket Shell Connection Kit
1 x AQUATEC 8852-2J03-B424 High Flow Booster Pump 110V Transformer
1 x Parts, Ro Water System Installation Parts Bag 1/4"
2 x 205, 3rd stage solid carbon block filter (replace every 12month)
4 x Optional 566 Filter Housing Wrench Case Opener KoolerMax System
1 x 718, Tubing 30 feet 1/4" white tube LLDPE PE for drinking water
2 x Optional 225UP 5th stage Inline Alkaline upgrade(includes media)
1 x SV-24AC-14, Solenoid Valve for Aquatec pump only 1/4" 24VAC ESO
1 x MK800, Maintenance kit for AR122, AR125, HK120, RD150, RO155
2 x 3150, 4th stage TFC-150 US membrane filter (every 2-3 yrs)
1 x CPR-150G, Pressure Regulator with Pressure Gauge (0-125 psi)
1 x WT-bac, Water Testing Kit, Bacteria Test
2 x Optional: 566 Filter Housing Wrench Opener WaterGeneral System
1 x PSW-360 Aquatec Pressure Switch 60 psi shut off 3/8" tubing TSO
1 x ERP500 Aquatec Permeate Pump Reverse Osmosis RO System USA made
1 x MKP, Maintenance kit for K5150P K6150P AR150P
1 x 318, 4th stage TFC-18 US membrane filter (replace every 2-3 yrs)
2 x PSW-340 Aquatec Pressure Switch 40 psi shut off 3/8" tubing TSO
1 x 741-38, Diverter Valve for RO DI Water Systems
1 x O-RING RINGS FOR WH20 WHOLE HOUSE SYSTEM HOUSING BIG BLUE 20"
1 x FKD-66, Replacement Filter Pack SED2005 CB2010 DB40 for RD322
1 x 602, UV Ultra Violet Sterilization Light Bulb ystem (6 watts)
1 x 3rd stage C10 carbon block filter (replace every 6-12 months)
1 x 285, Big Blue SED2005BB 20" Sediment filter WH25 WH250 WH2201
1 x SC412, Water Softening Filter Calcium Magnesium Hardness Removal
1 x 752set, DC Booster Pump Transformer Solenoid Pressure Switch All
1 x 7044-K Union Tee Connector Fitting Compression type 1/4"
1 x 701C, FHC1014 Filter Housing Chamber Casing Clear Color 1/4 FPT
1 x SC209, Specialty Filter Nitrate Removal Filter
1 x 671C, Replacement UV Lamp Light for 609C (16 Watt)
1 x TMR-UV-6W, Replacement UV Ballast Transformer 6 Watts for 602 UV

View Cart$6,157.36

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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