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Thread: Typical drain pipe size for IPC code?

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  1. #1

    Default Typical drain pipe size for IPC code?

    I was going to use 1-1/2" drain pipe for sinks, tub/shower, utility sink, and washing machine drain that will all lead into the 4" drain. My question is should I use a larger diameter like 2" or will the 1-1/2" be just fine ?

    IPC Plumbing Code
    International Plumbing Code
    http://www.internationalcodes.net/20...-2047-09.shtml

    Georgia's Construction Codes
    Mandatory Code:
    Georgia State Minimum Standard Mechanical Code (International Mechanical Code with Georgia State Amendments)
    Last edited by Terry; 08-23-2009 at 11:24 AM.

  2. #2
    Plumbing Designer FloridaOrange's Avatar
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    1-1/2" will work for sinks. In some newer codes the washing machine must be a 3" drain with a 2" trap.
    Matt
    Semi-professional plumbing designer
    Enjoying life in SW Florida

  3. #3

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    That sounds great. Thanks for the heads up and even though we are not subject to plumbing codes (other than septic) I want the person doing the work to make sure its done right thus all my dumb questions to make sure they do so.

    IPC Plumbing Code
    International Plumbing Code
    http://www.internationalcodes.net/20...-2047-09.shtml

    Georgia's Construction Codes
    Mandatory Code:
    Georgia State Minimum Standard Mechanical Code (International Mechanical Code with Georgia State Amendments)
    Last edited by Terry; 08-23-2009 at 11:31 AM.

  4. #4
    Illinois Licensed Plumber SewerRatz's Avatar
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    Quote Originally Posted by Mudball View Post
    That sounds great. Thanks for the heads up and even though we are not subject to plumbing codes (other than septic) I want the person doing the work to make sure its done right thus all my dumb questions to make sure they do so.
    Are you in the United States? If so you do have a plumbing code to follow. Your state may not have their own code, but they do follow one of the many codes out there. It could be IRC, BOCA, UPC, what ever building code your state follows.

    It really amazes me when people post there is no plumbing code for them to follow, or they do not have to follow a code, due to they are doing their own work, or they are so far out in a rural area there are no inspectors. What do you think the guys building homes in your area follow? Or do you really think they just do it how they fell it should be done?

    Please do not take this as a personal attack or anything. I just want you to realize there is a code out there you should be following. If your locality doesn't have an inspector, then check with your county, and if they do not have one I guarantee you there is a state inspector that will be more than happy to inspect the plumbing in your area. I have had state inspectors on my job site for a few different reasons(local inspector interrupting the code wrong, or the lack of a local inspector).

  5. #5
    In the Trades Gary Swart's Avatar
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    I think the thing you must realize is that codes are not troublesome roadblocks designed to cause tradesmen and homeowners grief. They are there to protect your health and safety. Consider some of the third worlds countries that have no plumbing codes. Sewage contaminates the water, stench from untrapped drains is common, electrical connections are fires waiting to happen, and on and on. We DIYers often don't realize the whys of many of the requirements, but there are reasons behind them. I would encourage you to find out what codes your area operates under and make sure your job is done properly.

  6. #6
    Forum Admin, Expert Plumber Terry's Avatar
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    IPC Plumbing Code
    International Plumbing Code
    http://www.internationalcodes.net/20...-2047-09.shtml

    Georgia's Construction Codes
    Mandatory Code:
    Georgia State Minimum Standard Mechanical Code (International Mechanical Code with Georgia State Amendments)
    You are not even close on your sizing.
    I suggest you talk to your local plumbing inspector, where you are buying your plumbing permit.
    If you live in the State of Georgia, then it's mandatory that you have a plumbing permit.

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