Problem flushing - testing drain

Discussion in 'Toilet Forum discussions' started by jechow, Jul 27, 2017.

  1. jechow

    jechow Member

    Jan 5, 2008
    British Columbia
    I have two builder toilets from the 1980's that constantly need double flushing. One of the toilet needs double flushing even for liquid waste.

    I'm going to replace the toilets with Toto's but I was thinking that I would test the drains before getting and installing new toilets. Can I do this test with the existing toilets still in place? I was thinking of taking a garden hose and running the water into the bowl.

  2. Reach4

    Reach4 Well-Known Member

    Sep 25, 2013
    That works. Another test would be to pour 4+ gallons of water from a 5 gallon bucket, to see if the drain can take the water quickly.
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  4. Terry

    Terry Administrator Staff Member

    Aug 17, 2004
    Bothell, Washington
    Pouring right into the bowl works well.
    A mid 80's toilet uses 3.5 gallons. There may be something in the trapway slowing things down, or you may have a flapper for a 1.6 gallon toilet in a tank the uses 3.5 and more.
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