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1 x Optional 5th or 6th Stage upgrade inline DI filter(color change)
1 x 759, Aquatec Demand Delivery Pump 5853-7E12-J524 Commercial 1.7G
1 x KM701C, Special Koolermax Filter Housing Canister Casing 1/4 FPT
1 x OPTIONAL: 567 Filter Housing Wrench Case Opener WHOLE HOUSE WH
1 x .RO260 Aquarium 300G REVERSE OSMOSIS AEROPONICS HYDROPONICS RO
1 x SC207, Specialty Filter Refillable Color Changing DI Filter for
1 x Optional: 564 Membrane Filter Housing Wrench Opener
1 x ERP500 Aquatec Permeate Pump Reverse Osmosis RO System USA made
2 x Parts, Ro Water System Installation Parts Bag 1/4"
1 x 532w, PAE RO Storage Pressure Osmosis Water Tank Container 4G
1 x BUNDLE PACK ANNUAL FILTER KIT FK3 WaterGeneral 102 150 (3 ITEMS)
1 x .AR125 Dual Outputs Aquarium & Home Drinking RO Filter System
1 x .AR104H High Efficiency Membrane Aquarium Reef Aeroponics RO DI
3 x 818, DI Resin Refill Bag 16oz (good for up to three refills)
1 x Optional 225UP 5th stage Inline Alkaline upgrade(includes media)
1 x 701C, FHC1014 Filter Housing Chamber Casing Clear Color 1/4 FPT
2 x 3rd stage C10 carbon block filter (replace every 6-12 months)
1 x FK-BB10K3, Big Blue Filter Pack Bundle for WH-1030 Whole House
1 x HK120-P-TK-220V for EURO 220V / 50Hz
1 x 4th stage Optional Refill bag #818 DI Resin Refill Bag
1 x SV-24DC-38-Plastic, KSD Solenoid Valve 3/8" 24V DC ESO
1 x FPK, High Quality Fitting and Connector 3/8" (Value-Pack)
1 x Optional 566 Filter Housing Wrench Case Opener KoolerMax System
1 x Wrench 2 pcs 566 Standard Filter Housing Opener Double Better
1 x Annual Filter Kit Koolermax Series KPAK-4 Sediment Carbon Block
1 x 578b, TDS-3 Battery Batteries for #578 TDS Water Quality Meter
1 x Value Pack- Entire 3 Years of Replacement Filters Bundle AR125
1 x 531, PAE RO Storage Pressure Osmosis Water Tank Container 3G
1 x SC227, Specialty Filter Refillable Color Changing DI Filter 20"
1 x MKP, Maintenance kit for K5150P K6150P AR150P

View Cart$1,970.45
Specials Log InCreate Account Checkout  Shopping Cart34 item(s)
1 x Optional 5th or 6th Stage upgrade inline DI filter(color change)
1 x 759, Aquatec Demand Delivery Pump 5853-7E12-J524 Commercial 1.7G
1 x KM701C, Special Koolermax Filter Housing Canister Casing 1/4 FPT
1 x OPTIONAL: 567 Filter Housing Wrench Case Opener WHOLE HOUSE WH
1 x .RO260 Aquarium 300G REVERSE OSMOSIS AEROPONICS HYDROPONICS RO
1 x SC207, Specialty Filter Refillable Color Changing DI Filter for
1 x Optional: 564 Membrane Filter Housing Wrench Opener
1 x ERP500 Aquatec Permeate Pump Reverse Osmosis RO System USA made
2 x Parts, Ro Water System Installation Parts Bag 1/4"
1 x 532w, PAE RO Storage Pressure Osmosis Water Tank Container 4G
1 x BUNDLE PACK ANNUAL FILTER KIT FK3 WaterGeneral 102 150 (3 ITEMS)
1 x .AR125 Dual Outputs Aquarium & Home Drinking RO Filter System
1 x .AR104H High Efficiency Membrane Aquarium Reef Aeroponics RO DI
3 x 818, DI Resin Refill Bag 16oz (good for up to three refills)
1 x Optional 225UP 5th stage Inline Alkaline upgrade(includes media)
1 x 701C, FHC1014 Filter Housing Chamber Casing Clear Color 1/4 FPT
2 x 3rd stage C10 carbon block filter (replace every 6-12 months)
1 x FK-BB10K3, Big Blue Filter Pack Bundle for WH-1030 Whole House
1 x HK120-P-TK-220V for EURO 220V / 50Hz
1 x 4th stage Optional Refill bag #818 DI Resin Refill Bag
1 x SV-24DC-38-Plastic, KSD Solenoid Valve 3/8" 24V DC ESO
1 x FPK, High Quality Fitting and Connector 3/8" (Value-Pack)
1 x Optional 566 Filter Housing Wrench Case Opener KoolerMax System
1 x Wrench 2 pcs 566 Standard Filter Housing Opener Double Better
1 x Annual Filter Kit Koolermax Series KPAK-4 Sediment Carbon Block
1 x 578b, TDS-3 Battery Batteries for #578 TDS Water Quality Meter
1 x Value Pack- Entire 3 Years of Replacement Filters Bundle AR125
1 x 531, PAE RO Storage Pressure Osmosis Water Tank Container 3G
1 x SC227, Specialty Filter Refillable Color Changing DI Filter 20"
1 x MKP, Maintenance kit for K5150P K6150P AR150P

View Cart$1,970.45

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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