Automatic Shut-off Valves


Automatic Shut-off Valves, also known as ASO valves, are a vital part of any efficient reverse osmosis system. RO ASO valves can save users thousands of gallons of water a year! They work by automatically shutting off production when the RO tank pressure reaches approximately 65% of the incoming line pressure, indicating that the tank is full. RO Systems without an ASO valve continually send rinse water to the drain even when the tank is full. ASO valves help to keep your system from wasting water and save you money. Fresh Water Systems will be happy to help you find the ideal reverse osmosis automatic shut off valve for your RO system. Let us help you save money on water with a brand new RO shut off valve.

Products


Flowmatic S3000H Automatic Shut-Off Valve 4 Way 1/4 QCFlowmatic S3000H Automatic Shut-Off Valve 4 Way 1/4 QC
Part Number: S3000HCB
  • The most popular ASO valve on the market
  • Connections: 1/4" Quick Connect
  • Shuts off supply line when tank reaches 65% of inlet pressure
  • Saves thousands of gallons of water per year
  • Constructed of FDA grade NSF certified materials
  • Available in black or white
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MSRP: $21.02
$16.99

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Flowmatic S2000HCB Automatic Shut-Off Valve 4 Way 1/4 QCFlowmatic S2000HCB Automatic Shut-Off Valve 4 Way 1/4 QC
Part Number: S2000HCB
Alternate Part Number: S2000HCW
  • Made with FDA grade & NSF certified materials
  • Saves thousands of gallons of water
  • 1/4" push-in port connections
  • Dual diaphragm design
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MSRP: $18.16
$16.49 

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Flowmatic S3000B Automatic Shut-Off Valve 4 Way 1/4 JACOFlowmatic S3000B Automatic Shut-Off Valve 4 Way 1/4 JACO
Part Number: S3000B
Alternate Part Number: S3000W
  • Made with FDA grade & NSF certified materials
  • Saves thousands of gallons of water
  • 1/4" JACO fittings
  • Dual diaphragm design
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MSRP: $18.36
$14.90 

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Hydronamic ASV-2000W Automatic Shut-off Valve 4 Way 1/4 QCHydronamic ASV-2000W Automatic Shut-off Valve 4 Way 1/4 QC
Part Number: ASV-2000W
  • Mold design includes mounting bracket
  • Easy and time-saving installation
  • ASV-2000W formally known as ASV-100JG
  • Saves thousands of gallons of water
  • 1/4" Quick Connects
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$11.99 

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Hydronamics ASV-ERP-JG Automatic Shut-off Valve for Permeate Pumps 4 Way 1/4 QCHydronamics ASV-ERP-JG Automatic Shut-off Valve for Permeate Pumps 4 Way 1/4 QC
Part Number: ASV-ERP-JG
Alternate Part Number: ASV-RED-CI010821, ASV-RED-CI010821W, 030711
  • Use with Permeate Pumps
  • Average shutoff range of 76-84% of incoming feed pressure
  • Connections: 1/4" QC
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$18.19 

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Nimbus 104019 Automatic Shut-Off Valve 3 Way Duckbill JACO 1/4 x 1/4 x 3/8 BranchNimbus 104019 Automatic Shut-Off Valve 3 Way Duckbill JACO 1/4 x 1/4 x 3/8 Branch
Part Number: 104019
  • Required on CS-1, CS-2 and CS-3 systems
  • Compatible with Nimbus Sierra System
  • Saves thousands of gallons of water
  • 3 way valve with JACO fittings
  • Connections: 1/4" x 1/4" x 3/8" Branch
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MSRP: $24.00
$18.25 

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Automatic Shut-off Valve Installation