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    AbouAdel's Avatar
    AbouAdel Posts: 1, Reputation: 1
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    #1

    Apr 19, 2010, 08:38 AM
    Installing check valves in main sewer lines
    Is it accepted in international plumbing code to install a check valve in drainage system (especially in main sewer lines)?
    speedball1's Avatar
    speedball1 Posts: 29,301, Reputation: 1939
    Eternal Plumber
    		  
    #2

    Apr 19, 2010, 12:54 PM
    Quote Originally Posted by AbouAdel View Post
    Is it accepted in international plumbing code to install a check valve in drainage system (especially in main sewer lines)?
    A sewer check valve's (see image) is acceptable In my code, (SPC) . However the drawback to that is while the check valve's blocking a street back up you can't drain or flush anything in the house. Let's see what some of our other experts say about it, Cheers, Tom
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    truck 41's Avatar
    truck 41 Posts: 221, Reputation: 21
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    #3

    Apr 19, 2010, 09:32 PM

    What problem are you faced with that brings up this question? Just wondering!
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