Question about Rheem Tankless Hot Water Heater Rtg-74pvp-2 7.4 Gpm
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The P1 error is not in the manual - but it indicates the backflow preventer (check valve) is not fully closing, and should be replaced.
This is a repair for a qualified technician.
Please call them to set up service @ Phone: 1-800-432-8373.
Posted on Dec 30, 2010
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Posted on Jan 02, 2017
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