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Toilet ballcock connection size

ChrisJChrisJ Member Posts: 11,244
edited December 2018 in Plumbing
Hi all.

Is the supply connection to toilet ballcocks and fill valves a standard size? Are there or were there different sizes over the years?

I have a 1960s American Standard and I need to make up a test hose so I can supply it with water outside to work on it.

I'm just going to leave it at that. :P.
Single pipe quasi-vapor system. Typical operating pressure 0.14 - 0.43 oz. EcoSteam ES-20 Advanced Control for Residential Steam boilers. Rectorseal Steamaster water treatment

Comments

  • It's a strange size: 7/8" IPS
    Often wrong, never in doubt.

    Click here to learn more about this contractor.
    ChrisJ
  • JUGHNEJUGHNE Member Posts: 7,182
    WC riser flex tube would give you a transition from 3/8" compression to WC connection.
    ChrisJ
  • ChrisJChrisJ Member Posts: 11,244
    edited December 2018
    I'm assuming they're all the same size then?

    Even a 1940s setup? Commercial (non-Sloan) and Residential?
    Single pipe quasi-vapor system. Typical operating pressure 0.14 - 0.43 oz. EcoSteam ES-20 Advanced Control for Residential Steam boilers. Rectorseal Steamaster water treatment
  • EzzyTEzzyT Member Posts: 1,031
    All American made toilets ballcock connection size has been 7/8” for over 100+ years.
    Creative Solutions Plumbing & Heating LLC
    Lic #12683
    Co-Owners: Fred Drescher, Jr & Eliezer "Ezzy" Travis
    Marketing & Operations: Dawn Drescher
    201.499.0223
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    ChrisJ
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