Log In Log In  |  Checkout   |  185 item(s)
1 x Panel 1/2" 6710M-44TM Digital Flow Meter count up Gallon 115V
1 x TMR-DC-2412, Transformer Power Supply for #752 Booster Pump
1 x 335UP, Upgrade Kit TFC 35 gal/day (includes US membrane filter)
1 x 755, Aquatec Demand Delivery Pump 5851-7E12-J574 Increase Output
2 x Optional 5th or 6th Stage upgrade inline DI filter(color change)
3 x 205 2nd stage solid carbon block filter (replace every 12 month)
1 x IM60, Ice Maker or RV Water Filter, Inline Typle
1 x 3rd stage Special High Efficiency Membrane Filter HTFC-150
2 x SV-24AC-38, KSD Solenoid Valve ESO 3/8" brass, 24V AC
1 x PSW-380 Aquatec Pressure Switch 80 psi shut off 3/8" tubing TSO
1 x FV-14, Bobby Float Valve Side Mount RM292-12-N NSF USA
3 x Annual Filter Kit Koolermax Series KPAK-4 Sediment Carbon Block
4 x Wrench 2 pcs 566 Standard Filter Housing Opener Double Better
3 x 1st stage SF05 sediment filter (replace every 6-12 months)
2 x Optional 225UP 5th stage Inline Alkaline upgrade(includes media)
5 x Optional: 564 Membrane Filter Housing Wrench Opener
1 x 318, 4th stage TFC-18 US membrane filter (replace every 2-3 yrs)
1 x 706, Membrane Filter Casing Housing Assembly
1 x CKV0402, Blue color Elbow Check Valve Elbow Type
7 x 532w, PAE RO Storage Pressure Osmosis Water Tank Container 4G
2 x Special, Output Conversion Kit Convert from 1/4" to 3/8"
1 x 4044-K Male Elbow Fitting Compression type 1/4" OD 1/4" NPT
2 x Special, Single Stage Housing Bracket Shell Connection Kit
1 x 7044-K Union Tee Connector Fitting Compression type 1/4"
2 x MK550, Maintenance kit for RO585, RD102, RD106, RO6, K5, K6
1 x 350UP, Upgrade Kit TFC50 gal/day (includes US membrane filter)
1 x 3/4" NPT Digiflow Digital Flow Meter count up total Water Gallon
2 x PSW-3100 Aquatec Pressure Switch 100 psi shut off 3/8 tubing TSO
2 x 752set, DC Booster Pump Transformer Solenoid Pressure Switch All
1 x CDP8800, AQUATEC CDP8852-2J03-B424 Booster Pump Only Fitting
2 x PSW-240 Aquatec Pressure Switch 40 psi shut off 1/4" tubing TSO
2 x OPTIONAL: 567 Filter Housing Wrench Case Opener WHOLE HOUSE WH
1 x DB40, DI Resin Refill Bag for DI210, RD322
3 x B2010, 20" Big Blue Filter Housing Cartridge WH20 WH25 WH250
4 x KM701C, Special Koolermax Filter Housing Canister Casing 1/4 FPT
1 x 6044-K Tee Fitting Compression Type 1/4"OD 1/4" NPT
1 x 399, 4th stage TFC-100 US membrane filter (every 2-3 yrs)
1 x 745, AFAN0409 Female Garden Hose / Laundry Hose Adapter
4 x Optional 566 Filter Housing Wrench Case Opener KoolerMax System
3 x 752, DC Booster Pump w/ Transformer
1 x AQF-600-102, Flow Meter Panel Mount 3/8" MPT
1 x KF355, Antique Brushed Brass / Iron Finish Drinking Water Faucet
1 x FM-8100T, DigiFlow Digital Water Flow Rate Meter 56" cable
3 x Parts, Ro Water System Installation Parts Bag 1/4"
1 x 741-14, Diverter Valve for Countertop Water Units
1 x 225, 5th stage Inline Alkaline filter with clear case (annual)
1 x TMR-220V-1A Aquatec TACS234-19 Transformer Power Supply EuroPlug
1 x Value Pack- Entire 3 Years of Replacement Filters Bundle K5
1 x DDP5800, Aquatec Demand Delivery Pump 5851-7E12 Increase Output
2 x PSW-280 Aquatec Pressure Switch 80 psi shut off 1/4 tubing TSO
1 x WT-bac, Water Testing Kit, Bacteria Test
1 x 578, TDS Water Quality Meter tds-3
1 x 732, Inline Pressure Gauge 0 to 300 psi for RO filter system
1 x TMR-25A, 2.5 AMP Transformer Power Supply Ballast for 8800 5853
1 x 578b, TDS-3 Battery Batteries for #578 TDS Water Quality Meter
1 x O-RING FOR WH10 WHOLE HOUSE SYSTEM HOUSING BIG BLUE 10" CANISTER
2 x 201, 1st stage sediment filter (replace every 6-12 months)
1 x MKP, Maintenance kit for K5150P K6150P AR150P
4 x 205, 3rd stage solid carbon block filter (replace every 12month)
1 x 818, DI Resin Refill Bag 16oz (good for up to three refills)
1 x SV-110AC-14, Solenoid Valve 1/4" plastic 110VAC ESO
1 x FK-BB10K3, Big Blue Filter Pack Bundle for WH-1030 Whole House
1 x 4th stage TFC 75/85 US membrane filter (every 2-3 yrs) M75
1 x 3rd stage C10 carbon block filter (replace every 6-12 months)
1 x Value Pack- Entire 3 Years of Replacement Filters Bundle AR150P
2 x CPR-150G, Pressure Regulator with Pressure Gauge (0-125 psi)
2 x SC207, Specialty Filter Refillable Color Changing DI Filter for
3 x 701, FH1014 Filter Housing Chamber Casing White Color 1/4 FPT
1 x BBK20, Replacement Filter 20" Big Blue Whole House WH-2201 WH250
2 x NM-5001C, HONEYWELL COUNTERTOP WATER FILTER *DISCONTINUED* SW1
1 x Value Pack- Entire 3 Years of Replacement Filters Bundle K6ALK
1 x 324, 4th stage TFC-24 US membrane filter (replace every 2-3 yrs)
1 x 4044-K qty 2 Male Elbow Fitting Compression type 1/4"
1 x SC412, Water Softening Filter Calcium Magnesium Hardness Removal
1 x 709C, Disc Shape Auto Shut Off Valve 4-way Four Way Valve
1 x CDP6800T110V, AQUATEC Booster Pump Transformer 6840-2J03-B224
2 x UC SHELL, Honeywell UC7000 Empty System Only No Filter
1 x 5th or 6th Stage IC21 inline carbon filter (every 6 to 12 mons)
2 x B2012, 20" Long Slim Filter Cartridge Housing RO260 RD322
1 x 6th Stage pn215 Refillable inline DI filter (color change)
1 x EMT-10, Empty Filter Cartridge Casing Housing
1 x FHP2012, 20" long Filter Cartridge Casing Housing RO260 RD322
1 x 5th stage 225 Inline Alkaline filter with clear housing (annual)
1 x FK-BB20M3, Special Big Blue Filter Pack Bundle for WH350 WH-350
1 x 741-38, Diverter Valve for RO DI Water Systems
1 x SW SHELL, Countertop SW1 Empty System Only No Filter
1 x FPK, High Quality Fitting and Connector 3/8" (Value-Pack)
2 x SVkit, Pump Shutoff Switch Kit for Aquatec Booster Pumps ESO TSO
2 x PSW-360 Aquatec Pressure Switch 60 psi shut off 3/8" tubing TSO
1 x Micro 1/4 NPT Digital Flow Meter count up total Water Liter LPM
2 x 2nd stage C10 carbon block filter (replace every 6-12 months)
1 x NM-5104, HONEYWELL COUNTERTOP WATER FILTER *DISCONTINUED* SW1
1 x AQUATEC 8852-2J03-B424 High Flow Booster Pump 110V Transformer
3 x 532b, PAE RO Water Storage Pressure Osmosis Tank Container 4G
1 x SC435, Specialty Filter Arsenic / Fluoride Removal Filter
1 x MK420, Maintenance kit for RO565
1 x 225UP, 5th stage Inline Alkaline upgrade (includes media)
1 x FKD-66, Replacement Filter Pack SED2005 CB2010 DB40 for RD322
1 x Value Pack- Entire 3 Years of Replacement Filters Bundle AR104H
3 x Optional: 566 Filter Housing Wrench Opener WaterGeneral System
1 x BUNDLE PACK ANNUAL FILTER KIT FK3 WaterGeneral 102 150 (3 ITEMS)
1 x SC227, Specialty Filter Refillable Color Changing DI Filter 20"
3 x KM701, Special Koolermax Filter Housing Canister Casing 1/4 FPT
2 x PSW-340 Aquatec Pressure Switch 40 psi shut off 3/8" tubing TSO
1 x MK8002, Maintenance kit for double membrane system RD322 RO260
1 x 214, Clear Inline Filter Cartridge Empty Case
1 x 215, 5th or 6th Stage Refillable inline DI filter (color change)
1 x B1034, 10" Big Blue Filter Housing Cartridge WH5 WH10 WH1134
1 x SV-24DC-38-Plastic, KSD Solenoid Valve 3/8" 24V DC ESO
1 x TMR-DC-1212, Transformer Power Supply for Delivery Demand Pump
1 x DM-2, Inline Dual TDS monitor (meter) for RO DI System DM2
1 x KF612, Elite Series: Oil Rubbed Bronze ORB Drinking Water Faucet
1 x CBV-38, Tank Ball Valve to 3/8 tubing
1 x 4042-K Male Elbow Fitting Compression type(membrane housing use)
1 x FM-6710M-88 1" Digital Flow Meter count up Total GPM 56" cable
1 x KF320, Elite Series: Brushed Nickel / Stainless Steel Faucet
1 x NM-5102, HONEYWELL COUNTERTOP WATER FILTER *DISCONTINUED* SW1
1 x 3.CB2010, 3rd stage carbon block filter 20" inch for RD322 RO260
1 x 4th stage TFC150 US membrane filter (every 2-3 yrs)M150 P/N3150
1 x MK225, Maintenance kit for Honeywell RO9100 Filtercold RO5 AV180
1 x Value Pack- Entire 3 Years of Replacement Filters Bundle K5150P
1 x SET68, AQUATEC 6840 AC Pump Set Solenoid ESO Pressure Switch SET

View Cart$6,631.11
Specials Log InCreate Account Checkout  Shopping Cart185 item(s)
1 x Panel 1/2" 6710M-44TM Digital Flow Meter count up Gallon 115V
1 x TMR-DC-2412, Transformer Power Supply for #752 Booster Pump
1 x 335UP, Upgrade Kit TFC 35 gal/day (includes US membrane filter)
1 x 755, Aquatec Demand Delivery Pump 5851-7E12-J574 Increase Output
2 x Optional 5th or 6th Stage upgrade inline DI filter(color change)
3 x 205 2nd stage solid carbon block filter (replace every 12 month)
1 x IM60, Ice Maker or RV Water Filter, Inline Typle
1 x 3rd stage Special High Efficiency Membrane Filter HTFC-150
2 x SV-24AC-38, KSD Solenoid Valve ESO 3/8" brass, 24V AC
1 x PSW-380 Aquatec Pressure Switch 80 psi shut off 3/8" tubing TSO
1 x FV-14, Bobby Float Valve Side Mount RM292-12-N NSF USA
3 x Annual Filter Kit Koolermax Series KPAK-4 Sediment Carbon Block
4 x Wrench 2 pcs 566 Standard Filter Housing Opener Double Better
3 x 1st stage SF05 sediment filter (replace every 6-12 months)
2 x Optional 225UP 5th stage Inline Alkaline upgrade(includes media)
5 x Optional: 564 Membrane Filter Housing Wrench Opener
1 x 318, 4th stage TFC-18 US membrane filter (replace every 2-3 yrs)
1 x 706, Membrane Filter Casing Housing Assembly
1 x CKV0402, Blue color Elbow Check Valve Elbow Type
7 x 532w, PAE RO Storage Pressure Osmosis Water Tank Container 4G
2 x Special, Output Conversion Kit Convert from 1/4" to 3/8"
1 x 4044-K Male Elbow Fitting Compression type 1/4" OD 1/4" NPT
2 x Special, Single Stage Housing Bracket Shell Connection Kit
1 x 7044-K Union Tee Connector Fitting Compression type 1/4"
2 x MK550, Maintenance kit for RO585, RD102, RD106, RO6, K5, K6
1 x 350UP, Upgrade Kit TFC50 gal/day (includes US membrane filter)
1 x 3/4" NPT Digiflow Digital Flow Meter count up total Water Gallon
2 x PSW-3100 Aquatec Pressure Switch 100 psi shut off 3/8 tubing TSO
2 x 752set, DC Booster Pump Transformer Solenoid Pressure Switch All
1 x CDP8800, AQUATEC CDP8852-2J03-B424 Booster Pump Only Fitting
2 x PSW-240 Aquatec Pressure Switch 40 psi shut off 1/4" tubing TSO
2 x OPTIONAL: 567 Filter Housing Wrench Case Opener WHOLE HOUSE WH
1 x DB40, DI Resin Refill Bag for DI210, RD322
3 x B2010, 20" Big Blue Filter Housing Cartridge WH20 WH25 WH250
4 x KM701C, Special Koolermax Filter Housing Canister Casing 1/4 FPT
1 x 6044-K Tee Fitting Compression Type 1/4"OD 1/4" NPT
1 x 399, 4th stage TFC-100 US membrane filter (every 2-3 yrs)
1 x 745, AFAN0409 Female Garden Hose / Laundry Hose Adapter
4 x Optional 566 Filter Housing Wrench Case Opener KoolerMax System
3 x 752, DC Booster Pump w/ Transformer
1 x AQF-600-102, Flow Meter Panel Mount 3/8" MPT
1 x KF355, Antique Brushed Brass / Iron Finish Drinking Water Faucet
1 x FM-8100T, DigiFlow Digital Water Flow Rate Meter 56" cable
3 x Parts, Ro Water System Installation Parts Bag 1/4"
1 x 741-14, Diverter Valve for Countertop Water Units
1 x 225, 5th stage Inline Alkaline filter with clear case (annual)
1 x TMR-220V-1A Aquatec TACS234-19 Transformer Power Supply EuroPlug
1 x Value Pack- Entire 3 Years of Replacement Filters Bundle K5
1 x DDP5800, Aquatec Demand Delivery Pump 5851-7E12 Increase Output
2 x PSW-280 Aquatec Pressure Switch 80 psi shut off 1/4 tubing TSO
1 x WT-bac, Water Testing Kit, Bacteria Test
1 x 578, TDS Water Quality Meter tds-3
1 x 732, Inline Pressure Gauge 0 to 300 psi for RO filter system
1 x TMR-25A, 2.5 AMP Transformer Power Supply Ballast for 8800 5853
1 x 578b, TDS-3 Battery Batteries for #578 TDS Water Quality Meter
1 x O-RING FOR WH10 WHOLE HOUSE SYSTEM HOUSING BIG BLUE 10" CANISTER
2 x 201, 1st stage sediment filter (replace every 6-12 months)
1 x MKP, Maintenance kit for K5150P K6150P AR150P
4 x 205, 3rd stage solid carbon block filter (replace every 12month)
1 x 818, DI Resin Refill Bag 16oz (good for up to three refills)
1 x SV-110AC-14, Solenoid Valve 1/4" plastic 110VAC ESO
1 x FK-BB10K3, Big Blue Filter Pack Bundle for WH-1030 Whole House
1 x 4th stage TFC 75/85 US membrane filter (every 2-3 yrs) M75
1 x 3rd stage C10 carbon block filter (replace every 6-12 months)
1 x Value Pack- Entire 3 Years of Replacement Filters Bundle AR150P
2 x CPR-150G, Pressure Regulator with Pressure Gauge (0-125 psi)
2 x SC207, Specialty Filter Refillable Color Changing DI Filter for
3 x 701, FH1014 Filter Housing Chamber Casing White Color 1/4 FPT
1 x BBK20, Replacement Filter 20" Big Blue Whole House WH-2201 WH250
2 x NM-5001C, HONEYWELL COUNTERTOP WATER FILTER *DISCONTINUED* SW1
1 x Value Pack- Entire 3 Years of Replacement Filters Bundle K6ALK
1 x 324, 4th stage TFC-24 US membrane filter (replace every 2-3 yrs)
1 x 4044-K qty 2 Male Elbow Fitting Compression type 1/4"
1 x SC412, Water Softening Filter Calcium Magnesium Hardness Removal
1 x 709C, Disc Shape Auto Shut Off Valve 4-way Four Way Valve
1 x CDP6800T110V, AQUATEC Booster Pump Transformer 6840-2J03-B224
2 x UC SHELL, Honeywell UC7000 Empty System Only No Filter
1 x 5th or 6th Stage IC21 inline carbon filter (every 6 to 12 mons)
2 x B2012, 20" Long Slim Filter Cartridge Housing RO260 RD322
1 x 6th Stage pn215 Refillable inline DI filter (color change)
1 x EMT-10, Empty Filter Cartridge Casing Housing
1 x FHP2012, 20" long Filter Cartridge Casing Housing RO260 RD322
1 x 5th stage 225 Inline Alkaline filter with clear housing (annual)
1 x FK-BB20M3, Special Big Blue Filter Pack Bundle for WH350 WH-350
1 x 741-38, Diverter Valve for RO DI Water Systems
1 x SW SHELL, Countertop SW1 Empty System Only No Filter
1 x FPK, High Quality Fitting and Connector 3/8" (Value-Pack)
2 x SVkit, Pump Shutoff Switch Kit for Aquatec Booster Pumps ESO TSO
2 x PSW-360 Aquatec Pressure Switch 60 psi shut off 3/8" tubing TSO
1 x Micro 1/4 NPT Digital Flow Meter count up total Water Liter LPM
2 x 2nd stage C10 carbon block filter (replace every 6-12 months)
1 x NM-5104, HONEYWELL COUNTERTOP WATER FILTER *DISCONTINUED* SW1
1 x AQUATEC 8852-2J03-B424 High Flow Booster Pump 110V Transformer
3 x 532b, PAE RO Water Storage Pressure Osmosis Tank Container 4G
1 x SC435, Specialty Filter Arsenic / Fluoride Removal Filter
1 x MK420, Maintenance kit for RO565
1 x 225UP, 5th stage Inline Alkaline upgrade (includes media)
1 x FKD-66, Replacement Filter Pack SED2005 CB2010 DB40 for RD322
1 x Value Pack- Entire 3 Years of Replacement Filters Bundle AR104H
3 x Optional: 566 Filter Housing Wrench Opener WaterGeneral System
1 x BUNDLE PACK ANNUAL FILTER KIT FK3 WaterGeneral 102 150 (3 ITEMS)
1 x SC227, Specialty Filter Refillable Color Changing DI Filter 20"
3 x KM701, Special Koolermax Filter Housing Canister Casing 1/4 FPT
2 x PSW-340 Aquatec Pressure Switch 40 psi shut off 3/8" tubing TSO
1 x MK8002, Maintenance kit for double membrane system RD322 RO260
1 x 214, Clear Inline Filter Cartridge Empty Case
1 x 215, 5th or 6th Stage Refillable inline DI filter (color change)
1 x B1034, 10" Big Blue Filter Housing Cartridge WH5 WH10 WH1134
1 x SV-24DC-38-Plastic, KSD Solenoid Valve 3/8" 24V DC ESO
1 x TMR-DC-1212, Transformer Power Supply for Delivery Demand Pump
1 x DM-2, Inline Dual TDS monitor (meter) for RO DI System DM2
1 x KF612, Elite Series: Oil Rubbed Bronze ORB Drinking Water Faucet
1 x CBV-38, Tank Ball Valve to 3/8 tubing
1 x 4042-K Male Elbow Fitting Compression type(membrane housing use)
1 x FM-6710M-88 1" Digital Flow Meter count up Total GPM 56" cable
1 x KF320, Elite Series: Brushed Nickel / Stainless Steel Faucet
1 x NM-5102, HONEYWELL COUNTERTOP WATER FILTER *DISCONTINUED* SW1
1 x 3.CB2010, 3rd stage carbon block filter 20" inch for RD322 RO260
1 x 4th stage TFC150 US membrane filter (every 2-3 yrs)M150 P/N3150
1 x MK225, Maintenance kit for Honeywell RO9100 Filtercold RO5 AV180
1 x Value Pack- Entire 3 Years of Replacement Filters Bundle K5150P
1 x SET68, AQUATEC 6840 AC Pump Set Solenoid ESO Pressure Switch SET

View Cart$6,631.11

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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