Automatic Washing Machine Water Shutoff Valve

Automatic Washing Machine Water Shutoff Valve

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Customers who have purchased washing machine shutoff valves have also been:
to flood stop systems for many applications - to washing machine outlet boxes - to remote water shutoff systems
to stainless braided washing machine hoses - to manual washing machine shutoff valves - to free standing laundry sinks
to deluxe stainless steel braided washing machine hoses with 90 elbow - to wireless alarm systems
to laundry wastewater filters - to water damage prevention kits

Low rates and easiest to calculate/understand shipping for Watts IntelliFlow™ paroducts

The Watts IntelliFlow™ Automatic Washing Machine Water Shutoff Valves with Leak Sensor are used in residential applications to protect against potentially catastrophic water damage from a burst inlet hose connected to a washing machine in use or unattended. Click here for another automatic shut-off valve for washing machines as well as one for water heaters and icemakers.


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Series A2C-M
Automatic Washing Machine Water Shutoff Valve
The Watts IntelliFlow™ Automatic No. 2 (A2C-M) is equipped with a state of the art electric current sensing device. When the washer is turned on, the device senses the current flow to the washer and opens the valves.

Upon completion of the full wash cycle when the washer shuts off, the device will sense the lack of current and close the water valves. Such automatic operation helps protect against a water damage repair situation should a washing machine inlet hose burst while the machine is unattended.

When the shut-off valves are left on, the constant water pressure can cause hose fatigue. This can increase the potential for leakage or a burst hose.

For added protection the leak sensor will sense any leaks during the wash cycle and automatically shut off the water valves to help prevent flooding & potential water damage if a leak occurs.
IntelliFlow™ A2C-M Specifications:
  • UL listed
  • Maximum Pressure: 150psi (10 bars)
  • Maximum Temperature: 180°F (82°C)
  • 115VAC, 15A, 60Hz
  • Cord: 15ft
  • Current draw (with appliance off): 20mA
  • Maximum appliance current rating: 15A
  • Circuit breaker requirement: 15 amp. GFI *

    • * It is suggested that the electrical power source be ground fault protected.

    Please Note: The IntelliFlow™ is not compatible with washing machines or combination washer/dryers that are 220VAC powered. In order to use the IntelliFlow™ with 220VAC powered appliances, you'll need to use it with the IntelliTimer. The Watts A2-IntelliTimer is a remote timer which allows the IntelliFlow™ to be used in applications where the washing machine or a combination washer/dryer is 220 VAC powered.

    IntelliFlow™ Systems
    Model # Size Adapter Fitting/Description Price & Quantity
    A2C-M1 1/2" Surface mount system - solder - with leak sensor $195.28
    A2C-WB-M1 1/2" Recessed mount with wall box - solder and/or thread - with leak sensor $212.62
    Retrofit Kits - for use with the valves shown above
    Model # Size Description Price & Quantity
    KA2-BD 1/2" For straight or angled shutoffs - includes glue
    - click here for parts breakdown
    		 $69.49
    KA2-A 1/2" Standard surface mount $70.42
    KA2-R 1/2" To adapt to existing wall box with single lever
    washing machine valve    		 $70.86
    A2-IntelliTimer
    Model Name Description Price & Quantity
    A2-IntelliTimer A remote timer which allows the IntelliFlow™ to be used in applications where a combination washer/dryer is 220 VAC powered. Activation of the push button on the timer causes current flow, which is detected by the Intelliflow™ then actuates the solenoid valves, allowing water to flow to the washing machine. This also begins a timing sequence of two hours, which, upon its completion de-energizes the IntelliFlow™. $142.71

    - Or -View Button

    Dimensions/Weight:
    Model A B C D E Weight
    A2C-M1 6" 2 1/8" 4 1/4" 3 1/32" 2 3/8" 2.0 lbs.
    A2C-M1-WB 8" 2 1/8" 4 1/4" 3 1/32" 2 3/8" 3.5 lbs.

    Watts A2C washing machine shut off valve
    Easy Installation:

    The Watts A2C-M1 IntelliFlow™ comes equipped with 1/2" (13mm) sweat adapters to receive tubing. Either connection may be used for the hot or cold water supply because the A2C-M1 is equipped with long wearing Buna-N diaphragms for long life. Water supply connections are 23/8" (60mm) on centers. No electrical wiring is required. Simply plug the washing machine power cord into the IntelliFlow™ and plug it to the standard 15A, GFI*, 115 volt outlet.

    *Ground fault interrupter circuit
    Typical Installations:

    The Watts IntelliFlow™ can be installed in new construction or as an upgrade to existing installations.
    A2C washing machine installation

    clothes washing machine shut off valves

    washing machine shutoff valves"I broke my leak sensor, can I buy just the sensor as a replacement part?"
    electric clothes washer valve Yes, you can purchase the leak sensor, part number A2C-LS = $35.28

    - Or -View Button

    washing machine shutoff valves"If the power was to fail, would the water continue to flow through the valves or would the valve switch to the off position?"
    electric clothes washer valveThe valves used in the IntelliFlow™ are "Normally Closed" solenoid valves. If they are on/open when the power goes off, they will return to the off/closed position.

    washing machine shutoff valves"I only have one cold valve and do not have a hot side as I wash my clothes with cold water. Can I still use this shutoff valve?"
    electric clothes washer valveThat's not a problem at all. This valve will work with only one side hooked up, providing there is no water coming into the side not connected to your washing machine.

    washing machine shutoff valves"I installed one of these Watts IntelliFlow™ automatic washing machine water shutoff valves and now there is noticeable water hammer. Is there any way to reduce the water hammer?"
    electric clothes washer valveAny device that is a quick-acting shutoff valve, may cause water hammer. We suggest that you install water hammer arrestors when installing any fast closing shutoff valve.

    washing machine shutoff valves"What is Water Hammer?"
    electric clothes washer valveWater hammer is a phenomenon caused by a combination of conditions usually involving a quick closing valve, and manifests itself as banging, knocking or hammering noises in your pipes.

    Quick closing valves by themselves are not necessarily the cause of water hammer.

    Several factors can contribute either by themselves or in any combination to cause water hammer such as:

  • Improperly sized piping with relation to water flow velocity
  • High water pressure
  • Long runs of pipe between the water supply and the valve
  • No shock absorbing system in place, such as hammer arrestors
  • Fast closing valves
  • Poor strapping of the piping system to the structure. (This is not the cause of the water hammer, more a symptom and contributor to the amount of noise.)


    • Water hammer is caused by the shock of the moving water in the pipe coming to a sudden stop when a valve closes, such as with automatic valves found in washing machines, dishwashers, ice makers and sprinkler systems. It can also be caused by fast closing manual valves, such as shower valves; kitchen sink faucets, bathroom sink faucets and even some toilet fill valves. Although most sink faucets have low flow aerators that help in preventing the water volume and/or velocity from reaching water hammer levels; high water pressure and/or undersized piping coupled with high flow aerators can allow these fixtures to cause water hammer.

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