Asco brass-body solenoid valve operating on 22-Volts, suitable for controlling water : solenoid Water control valve type (C) InspectAPedia Electric Solenoid Plumbing & HVAC Controls & Valves
Guide to all solenoid valves used on plumbing or mechanical systems

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Electrically-operated solenoid valves, plumbing water solenoid control valves guide:

This article describes and illustrate the different types of electrically-operated or solenoid valves found on water supply and drainage systems as well on other plumbing and heating devices & fixtures.

We discuss where to buy a solenoid valve, provide a list of solenoid valve manufacturers, brands types and we explain how to choose the right solenoid valve for water or other controls in a building. Details about all types of plumbing system valves on supply piping, drain piping, & plumbing fixtures or appliances: check valves, flushometer valves, etc.

This list of the types of control valves found in residential and light commercial buildings includes links to detailed information about each valve type.

Shown at page top: a solenoid operated water control valve produced by Asco and operating at 12-volts. Company contact information is given in this article.

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Electric Solenoid Operated Gas, Oil, Water Valves used in Buildings

Alcon low voltage operated solenoid valve (C) InspectApedia, Alcon contact information is in this articleHere we describe electrically operated plumbing valves used for water control of equipment or piping in buildings. Solenoid valves are electrically controlled valves that in response to an electrical signal can open, close, or adjust the flow rate of a liquid or gas being piped through the valve.

How a solenoid valve works:

An electrical current in any of a variety of voltage and cycle ranges (depending on the valve design) is converted in the valve to an electromagnetic field by applying the current to a coil (coiled wire around a core). The magnetic field created by the current in turn is converted to mechanical energy to move the valve to the desired position.

Solenoid valves are used in heating and cooling applications as well as in many building water supply applications.

[Click to enlarge any image]

Shown at left, an Alcon solenoid-operated control valve that is suitable for some of the applications discussed below.

Reader Question: where can I buy a solenoid-operated water shut-off valve?

15 January 2015 Martin said:

We have a water break tank in basement cant get overflow out.We have been told we can drop a over flow from the large tank into a smaller header tank.

A flow detector is then place in the smaller tank and then connected to the incoming water main via a solenoid valve which would turn off water supply.

Any ideas where I can purchase solenoid-operated water shut-off valves?

This question and our reply were posted originally at WATER TANK: USES, TROUBLESHOOTING.


Martin a number of companies provide electrically-operated solenoid-type shutoff valves including valves that can close off a water supply line. The operating pressure range and piping diameters among the various products vary so you’ll want to contact the company’s technical or sales people to discuss your specific needs.

Prices for electric solenoid valves range from under $50. U.S.D. to over $500. U.S.D. depending on the application.

Watch out: check the solenoid valve specifications carefully to match against your system's needs, including at least the following:

  1. Suitability for handling the liquid you are controlling
  2. Operating pressure range of the solenoid water valve
  3. Operating voltage ranges of the solenoid valve: for example low-voltage 12VAC, 12VDC, 18VAC, 24VAC, or household current levels of 120VAC 50/60Hz to 208-240VAC 50.60 Hz
  4. Valve default position: normally OPEN or normally CLOSED
  5. Use of lead in the valve components - may be unsuitable for some locations or may be prohibited by local plumbing codes

Where to Buy Electrically Operated or Solenoid Operated Water Control Valves

InspectAPedia is an independent publisher of building, environmental, and forensic inspection, diagnosis, and repair information provided free to the public - we have no business nor financial connection with any manufacturer or service provider discussed at our website.

Note: while we list solenoid valve manufacturers just below, these products are widely available close to your location from local plumbing or HVAC suppliers, building supply stores or they can be purchased from online suppliers.

Other Electrical & Solenoid Valves used in Buildings & on Building Mechanical Systems

Oil delay valve used on Beckett oil burners (C) Daniel Friedman

Examples of types of electrically operated or solenoid operated valves used in buildings include

Our complete list of types of control valves use in buildings and on building mechanical systems is found at MORE READING.


Continue reading at PLUMBING CONTROLS & VALVES or select a topic from closely-related articles below, or see our complete INDEX to RELATED ARTICLES below.

Or see PLUMBING CONTROLS & VALVES for a complete list of the types & applications of valves used in building mechanical systems.

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ELECTRIC SOLENOID VALVES at - online encyclopedia of building & environmental inspection, testing, diagnosis, repair, & problem prevention advice.


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