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2 x OPTIONAL: 567 Filter Housing Wrench Case Opener WHOLE HOUSE WH
1 x 310, 2nd stage CTA 10 US Membrane filter
1 x NM-5104, HONEYWELL COUNTERTOP WATER FILTER *DISCONTINUED* SW1
1 x FK-BB20M3, Special Big Blue Filter Pack Bundle for WH350 WH-350
1 x O-RING FOR WH10 WHOLE HOUSE SYSTEM HOUSING BIG BLUE 10" CANISTER
1 x 225UP, 5th stage Inline Alkaline upgrade (includes media)
1 x 201, 1st stage sediment filter (replace every 6-12 months)
1 x SC435, Specialty Filter Arsenic / Fluoride Removal Filter
1 x UC SHELL, Honeywell UC7000 Empty System Only No Filter
1 x RF62, Replacement filter for CT-6000, UC7000, SW-1, and SW-1C
1 x SC209, Specialty Filter Nitrate Removal Filter
1 x 285, Big Blue SED2005BB 20" Sediment filter WH25 WH250 WH2201
1 x 202,1 MICRON Sediment filter (replace every 6-12 month) SED1001
1 x Special, Output Conversion Kit Convert from 1/4" to 3/8"
1 x MK200, Maintenance kit for Rotek Systems RCT-103 and RTF-265
2 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 818, DI Resin Refill Bag 16oz (good for up to three refills)
1 x SV-24DC-38-Plastic, KSD Solenoid Valve 3/8" 24V DC ESO
1 x CKV0402, Blue color Elbow Check Valve Elbow Type
1 x 4044-K qty 2 Male Elbow Fitting Compression type 1/4"
2 x MK550, Maintenance kit for RO585, RD102, RD106, RO6, K5, K6
1 x SET8855 Aquatec 5853 Booster Pump Assembly for Aeroponics System
2 x 399, 4th stage TFC-100 US membrane filter (every 2-3 yrs)
2 x Optional 566 Filter Housing Wrench Case Opener KoolerMax System
1 x SV-24AC-14, Solenoid Valve for Aquatec pump only 1/4" 24VAC ESO
1 x .AR150PNTF, KoolerMax AR150P RO System Shell without tank faucet
2 x 532b, PAE RO Water Storage Pressure Osmosis Tank Container 4G
1 x 727, Feed Water Adapter 3/8" compression adapter 1/4" inline bal
1 x SV-24AC-14, Solenoid Valve ESO for Aquatec pump 1/4" wiring
1 x HK120 KoolerMax Aeroponics Hydroponics 150G RO Filtration System
2 x 3rd stage C10 carbon block filter (replace every 6-12 months)
1 x *Discontinued* RO155C
1 x Parts, Ro Water System Installation Parts Bag 1/4"
1 x 745, AFAN0409 Female Garden Hose / Laundry Hose Adapter
1 x PSW-340 Aquatec Pressure Switch 40 psi shut off 3/8" tubing TSO
1 x .AR150P, AQUARIUM & DRINKING 2 OUTPUTS Reverse Osmosis RO+DI+P
1 x KT-103, Optional Manual Membrane Flush Valve
1 x 1070, PAE LARGE RO Storage Pressure Tank 14 GALLON 14G
1 x .AR122 KoolerMax 6STAGE Aquarium Reef REVERSE OSMOSIS RODI WATER
1 x .RD322 Aquarium 260-300 GPD REVERSE OSMOSIS RO+DI WATER SYSTEM
1 x 532wpg, PAE RO water pressure white tank bladder gauge valve 4G
1 x PSW-3100 Aquatec Pressure Switch 100 psi shut off 3/8 tubing TSO
1 x Optional: 564 Membrane Filter Housing Wrench Opener
1 x HK120-P-TK-220V for EURO 220V / 50Hz
1 x 602, UV Ultra Violet Sterilization Light Bulb ystem (6 watts)
1 x 733, Built-in Pressure Gauge 0 to 150 psi for Koolermax RO syste
1 x *Discontinued* RD106
1 x 205 2nd stage solid carbon block filter (replace every 12 month)
1 x 3.CB2010, 3rd stage carbon block filter 20" inch for RD322 RO260
1 x PSW-240 Aquatec Pressure Switch 40 psi shut off 1/4" tubing TSO
1 x Value Pack- Entire 3 Years of Replacement Filters Bundle K6ALK
1 x 5th stage 225 Inline Alkaline filter with clear housing (annual)
1 x Value Pack- Entire 3 Years of Replacement Filters Bundle RO260
1 x KM701, Special Koolermax Filter Housing Canister Casing 1/4 FPT
1 x .AR104H High Efficiency Membrane Aquarium Reef Aeroponics RO DI
1 x .AR125NTF KoolerMax AR125 RO System Shell without tank & faucet
2 x Wrench 2 pcs 566 Standard Filter Housing Opener Double Better
1 x 701C, FHC1014 Filter Housing Chamber Casing Clear Color 1/4 FPT
1 x CBV-38, Tank Ball Valve to 3/8 tubing
1 x .RO260 Aquarium 300G REVERSE OSMOSIS AEROPONICS HYDROPONICS RO
1 x CPR-150G, Pressure Regulator with Pressure Gauge (0-125 psi)
1 x 205, 3rd stage solid carbon block filter (replace every 12month)

View Cart$4,635.49
Specials Log InCreate Account Checkout  Shopping Cart72 item(s)
2 x OPTIONAL: 567 Filter Housing Wrench Case Opener WHOLE HOUSE WH
1 x 310, 2nd stage CTA 10 US Membrane filter
1 x NM-5104, HONEYWELL COUNTERTOP WATER FILTER *DISCONTINUED* SW1
1 x FK-BB20M3, Special Big Blue Filter Pack Bundle for WH350 WH-350
1 x O-RING FOR WH10 WHOLE HOUSE SYSTEM HOUSING BIG BLUE 10" CANISTER
1 x 225UP, 5th stage Inline Alkaline upgrade (includes media)
1 x 201, 1st stage sediment filter (replace every 6-12 months)
1 x SC435, Specialty Filter Arsenic / Fluoride Removal Filter
1 x UC SHELL, Honeywell UC7000 Empty System Only No Filter
1 x RF62, Replacement filter for CT-6000, UC7000, SW-1, and SW-1C
1 x SC209, Specialty Filter Nitrate Removal Filter
1 x 285, Big Blue SED2005BB 20" Sediment filter WH25 WH250 WH2201
1 x 202,1 MICRON Sediment filter (replace every 6-12 month) SED1001
1 x Special, Output Conversion Kit Convert from 1/4" to 3/8"
1 x MK200, Maintenance kit for Rotek Systems RCT-103 and RTF-265
2 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 818, DI Resin Refill Bag 16oz (good for up to three refills)
1 x SV-24DC-38-Plastic, KSD Solenoid Valve 3/8" 24V DC ESO
1 x CKV0402, Blue color Elbow Check Valve Elbow Type
1 x 4044-K qty 2 Male Elbow Fitting Compression type 1/4"
2 x MK550, Maintenance kit for RO585, RD102, RD106, RO6, K5, K6
1 x SET8855 Aquatec 5853 Booster Pump Assembly for Aeroponics System
2 x 399, 4th stage TFC-100 US membrane filter (every 2-3 yrs)
2 x Optional 566 Filter Housing Wrench Case Opener KoolerMax System
1 x SV-24AC-14, Solenoid Valve for Aquatec pump only 1/4" 24VAC ESO
1 x .AR150PNTF, KoolerMax AR150P RO System Shell without tank faucet
2 x 532b, PAE RO Water Storage Pressure Osmosis Tank Container 4G
1 x 727, Feed Water Adapter 3/8" compression adapter 1/4" inline bal
1 x SV-24AC-14, Solenoid Valve ESO for Aquatec pump 1/4" wiring
1 x HK120 KoolerMax Aeroponics Hydroponics 150G RO Filtration System
2 x 3rd stage C10 carbon block filter (replace every 6-12 months)
1 x *Discontinued* RO155C
1 x Parts, Ro Water System Installation Parts Bag 1/4"
1 x 745, AFAN0409 Female Garden Hose / Laundry Hose Adapter
1 x PSW-340 Aquatec Pressure Switch 40 psi shut off 3/8" tubing TSO
1 x .AR150P, AQUARIUM & DRINKING 2 OUTPUTS Reverse Osmosis RO+DI+P
1 x KT-103, Optional Manual Membrane Flush Valve
1 x 1070, PAE LARGE RO Storage Pressure Tank 14 GALLON 14G
1 x .AR122 KoolerMax 6STAGE Aquarium Reef REVERSE OSMOSIS RODI WATER
1 x .RD322 Aquarium 260-300 GPD REVERSE OSMOSIS RO+DI WATER SYSTEM
1 x 532wpg, PAE RO water pressure white tank bladder gauge valve 4G
1 x PSW-3100 Aquatec Pressure Switch 100 psi shut off 3/8 tubing TSO
1 x Optional: 564 Membrane Filter Housing Wrench Opener
1 x HK120-P-TK-220V for EURO 220V / 50Hz
1 x 602, UV Ultra Violet Sterilization Light Bulb ystem (6 watts)
1 x 733, Built-in Pressure Gauge 0 to 150 psi for Koolermax RO syste
1 x *Discontinued* RD106
1 x 205 2nd stage solid carbon block filter (replace every 12 month)
1 x 3.CB2010, 3rd stage carbon block filter 20" inch for RD322 RO260
1 x PSW-240 Aquatec Pressure Switch 40 psi shut off 1/4" tubing TSO
1 x Value Pack- Entire 3 Years of Replacement Filters Bundle K6ALK
1 x 5th stage 225 Inline Alkaline filter with clear housing (annual)
1 x Value Pack- Entire 3 Years of Replacement Filters Bundle RO260
1 x KM701, Special Koolermax Filter Housing Canister Casing 1/4 FPT
1 x .AR104H High Efficiency Membrane Aquarium Reef Aeroponics RO DI
1 x .AR125NTF KoolerMax AR125 RO System Shell without tank & faucet
2 x Wrench 2 pcs 566 Standard Filter Housing Opener Double Better
1 x 701C, FHC1014 Filter Housing Chamber Casing Clear Color 1/4 FPT
1 x CBV-38, Tank Ball Valve to 3/8 tubing
1 x .RO260 Aquarium 300G REVERSE OSMOSIS AEROPONICS HYDROPONICS RO
1 x CPR-150G, Pressure Regulator with Pressure Gauge (0-125 psi)
1 x 205, 3rd stage solid carbon block filter (replace every 12month)

View Cart$4,635.49

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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