Gate Valve on 2" Ejector Basin discharge line

Discussion in 'Plumbing Forum, Professional & DIY Advice' started by Rich_B, Apr 7, 2008.

  1. Rich_B

    Rich_B New Member

    Messages:
    14
    :confused:I know a gate valve is required on the 2" DWV line upstream from the check valve from the ejector pump basin. What's the purpose for the gate valve if it's always opened? Is it used to regulate/restrict the diameter to avoid possible air hammer/chatter during discharge?
  2. jadnashua

    jadnashua Retired Defense Industry Engineer xxx

    Messages:
    22,360
    Location:
    New England
    I don't know about the type of valve, but I'd want a valve there in case I needed to repair, replace, or service the check valve, pump, or tank...you wouldn't want a hiccup letting the sewer back up on your head while you had things apart.
  3. Redwood

    Redwood Master Plumber

    Messages:
    7,450
    Location:
    Connecticut
    No it is to keep the sewage from draining back if you have to replace the check valve. It should be left in the wide open position at all other times...

    Some systems can have quite a bit of head on them and without a valve it would be a bad day for a plumber and your basement!
    Personally I would quote a really crazy $$$$ to do the work and sincerely hope that that you found someone cheaper to do it!
    Last edited: Apr 7, 2008
  4. Rich_B

    Rich_B New Member

    Messages:
    14
    Ok...makes really great sense now. I'm doing the work myself and would not install the line without it....just never considerd the possible amount of "head" that could be in the line...or replacing the check valve.
    Thanks!
  5. Redwood

    Redwood Master Plumber

    Messages:
    7,450
    Location:
    Connecticut
    Yea, I did a job on one where the line was on an uphill for about 400 feet... Imagine 400' of 2" dia. liquified poo coming at ya!:eek:

    Fortunately there was a valve!
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