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Home>Installation Parts & Filter Accessories>Reverse Osmosis System Parts and Accessories>Automatic Shut-Off Valves > TIER1-ASOV-14CW


Automatic Shut-Off Valve ASOV-14CW (1/4" Compression)

All Four 1/4 Compression Nuts Included; White

Automatic Shut-Off Valve for Reverse Osmosis Water Filtration Systems ASOV-14CW
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Product Code: TIER1-ASOV-14CW
Retail Price: $19.99
  • Automatic Shut-Off Valve ASOV-14CW:
  • This a replacement part for a standard residential Reverse Osmosis (RO) System. The ASOV (Auto Shut Off Valve) is a key component used in standard Reverse Osmosis (RO) based Point-Of-Use (POU) drinking water treatment systems.
  • The Auto Shut Off Valve is designed to shut off at 65% of supply line pressure. This means that when the tank pressure reaches approximately 65% of the incoming line pressure, the ASO Valve will shut off production.
  • The Auto Shut Off valve saves as much as 15,000 Gallons of water per year by shutting off the water once your tank is full.
  • The ASO Valve is manufactured with NSF listed materials. The ASOV ( Auto Shut Off Valve) utilizes a diaphragm between the feed water and treated water to control the flow of feed water into the treatment system.
  • The Automatic Shut-Off Valve has been tested and certified by NSF International under NSF/ANSI Standard 58.
  • In addition to these certification requirements, the ASOV undergoes 100% leak testing at 150 psi as part of the manufacturing quality control standards.
  • All tube connections are 1/4" with "in" and "out" labeled on the top. The Auto Shut Off Valve comes with four easy to use 1/4" water line connectors.
  • Purchase the optional CLP-ASVW Clip for mounting the ASOV-14C Automatic Shut-Off Valve.
The ASOV-14CW has been discontinued by the manufacturer. Purchase the compatible ASV-100JACO Auto Shut-Off Valve available below.
  • Automatic Shut-Off Valve Specs:
  • Operating Pressure: 30-100 PSI
  • Operating Temperature: 120 F (50 C)
  • Materials of Construction:
    Body: Polypropylene
    Diaphragm: EPDM
    Screw: SS 304
  • Tested and Certified by NSF International to ANSI/NSF Standard 42 for material requirements only.
  • NSF STANDARD 58 CERTIFIED STRUCTURAL TESTING:
    300 PSI HYDROSTATIC PRESSURE TESTING
    400 PSI BURST PRESSURE TESTING
    100,000 CYCLE TESTING FROM 0-150 PSI
    NSF STANDARD 58 CERTIFIED PERFORMANCE TESTING:
    20,000 CYCLE TESTING TO STIMULATE 10 YEARS OF USE.
  • Manufacturer: Tier1 ASOV-14CW
  • Use ASOV-14CW in place of:
  • ASOV-14CB, ASOV-14QW, ASOV-14QB, ASV-14, ASV-14C, ASV-14Q, PWS392W, PWS592Q, ASV-2000W, ASV-100JG, ASV-100JACO
  • Automatic Shut-Off Valve Instructions (Scroll Down for Diagram):
  • The "in & out" markings are on the top of the valve. The top side of the valve is the high pressure side and the bottom side is the low pressure side.
  • 1. Insert the tube feeding the membrane inlet into the ASOV IN/OUT fittings:
    a) Insert the tube from the PREFILTER Outlet into the "IN" fitting .
    b) Insert the opposite tube end that feeds the Membrane INLET into the "OUT" fitting . NOTE: The "IN & OUT" markings are on the screw side of the valve - THIS IS THE HIGH PRESSURE FEED SIDE.
  • 2. Insert the tube feeding the tank from the Product Water port of the membrane housing:
    a) Locate the Product Water outlet from the membrane housing (on the end w/ 2 ports: center is Product water, side port is Rinse/Drain).
    b) Insert the Product water tube from the membrane housing into either "Tank" fitting of the valve (ie Low Pressure side).
    c) Insert the opposite tube end that feeds the Tank into the other "Tank" fitting of the valve.
  • How the Automatic Shut-Off Valve Works:
  • The valve automatically shuts off production when the tank pressure reaches approximately 65% of the incoming line pressure to indicate the tank is full.
  • The ASO valve saves thousands of gallons of water. Reverse Osmosis Systems without an Automatic Shut-Off valve continually send rinse water to the drain even when the tank is full.
  • Automatic Shut-Off Valve Example Process:
  • Feed water goes through a set of three pre filters (Sediment filter, Carbon filter, Carbon filter), passes through the ASOV, and then goes to the RO membrane to produce RO water.
  • The RO water passes through the system to be stored in the water tank. When the tank fills with RO water and the tank pressure reaches 40 psi, the back pressure will reverse the ASOV diaphragm and will shut off due to the pressure differential.
  • When the RO water end pressure is greater than the Feed water pressure, it causes the piston to move downward and shut off the in and out channel.
  • When the ASOV In and Out channel shuts off, the system will not produce any RO water.


ASOV Reverse Osmosis System Flow

This item has been discontinued
Replacement Filters and Parts or Alternative System for the Above Unavailable Product
Hydronamic ASV-100JACO Auto Shut-Off Valve Hydronamic ASV-100JACO Auto Shut-Off Valve
Clip for Automatic Shut Off Valve CLP-ASVW Clip for Automatic Shut Off Valve CLP-ASVW Automatic Shut-Off Valve ASOV-14QW (1/4 Automatic Shut-Off Valve ASOV-14QW (1/4" Quick Connect) Pro Products Sani-System SS96RO Liquid Reverse Osmosis Sanitizer (1 pack) Pro Products Sani-System SS96RO Liquid Reverse Osmosis Sanitizer (1 pack)    Add to Cart