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What size shutoff valve should I use?

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  • What size shutoff valve should I use?

    What size water shut off valve? I am planning to install automatic water shutoff valve on the main water line in vacation house. I am not totally sure if the pipes are copper or galvanized but the house (in CA) was build in 1979, so I would guess it is copper. I measured outside diameter of the pipe that was 0.875" (7/8"). I guess this is 3/4 pipe, right? I need help to decide which model of shutoff valve I need. The model I am looking at is "Greenfield Automatic Security Valve Kit, 3/4 In. Pipe", model AVS075. It is available from Amazon. Is this the right size for my pipe? Or should I go with AVS100 model that is described as Greenfield Automatic Security Valve Kit, 1 In. Pipe? I am not sure if the pipe size in the name of the valve model refers to the inside or outside diameter of the pipe. Thanks a lot Maxim

  • #2
    if it's a ballvalve style shut off go with the 3/4''. if it's a solenoid style, go with the 1'' as there will be less pressure loss.

    Rick.
    phoebe it is

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    • #3
      Originally posted by PLUMBER RICK View Post
      if it's a ballvalve style shut off go with the 3/4''. if it's a solenoid style, go with the 1'' as there will be less pressure loss.

      Rick.


      I am assuming solenoid and 1 size bigger is correct.

      David

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      • #4
        Actually motorized ball valves are pretty common. I have them for washing machines and water heaters. They are full port and low voltage.

        Rick.
        phoebe it is

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        • #5
          Thanks much. I am still confused. I thought that specific size of the pipe (it is cooper I checked) implies one specific size of the valve. But it sounds like different sizes may work? This is the valve model I am looking at http://www.amazon.com/Greenfield-Aut...Security+Valve It is also available in 1" size http://www.amazon.com/gp/product/B00...A33RI86K4PO1EO Should I go with 1" or 3/4" model? Thanks again!

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          • #6
            try this link. the price is less than 50% of yours and comes with the controller too.

            http://www.getfloodstop.com/category_s/2.htm

            Rick.
            phoebe it is

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