pin holes in copper pipe

Discussion in 'Tankless Water Heater Forum' started by Dennis Anthony, Jun 11, 2011.

  1. Dennis Anthony

    Dennis Anthony New Member

    Jun 11, 2011
    Hey everyone, new to the forum. I was wondering if anyone else has had problems of copper pipe corrusion a little while after installing a gas fired tankless water heater. About 6 years after installation I started having problems within 12 feet of the heater. Two different area,s. So far I,ve talked to three people with the same thing all with tankless heaters all on hot water lines close to the heater. There will be a little spot of green corrusion then a pin hole will develop. I appreciate any help I can get. Thanks Dennis
  2. LLigetfa

    LLigetfa DIYer, not in the trades

    Feb 6, 2011
    NW Ontario, Canada
    Did the installation of the tankless change the electrical continuity of the the copper piping? What I mean is there some sort of electrical isolation now?

    Some theories of pinhole leaks suggest galvanic corrosion. Tank heaters have sacrificial anodes.
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  4. Smooky

    Smooky In the Trades

    Apr 4, 2011
    North Carolina
    Heat accelerates corrosion. I would do a complete water analysis.
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