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  1. jimolson

    What Causes Repetitive Water Hammering?

    Repetitive Water Hammering: Problem Resolved I resolved the problem I posed to the forum last week. When I removed the 39 gallon low boy electric water heater it gave me better view of a tight nest of copper piping secluded in the closet wall behind it. The nest of pipes included a pressure...
  2. jimolson

    Tankless Water Heaters: Safety Certifications?

    Thanks for the feedback, Don. The suggestion about posting to the electrical forum is a good one. A ground fault interrupter probably wouldn't work with a tankless water heater of the kind I describe. The continuous and intentional current leakage into the grounding wire would trip the GFI as...
  3. jimolson

    What Causes Repetitive Water Hammering?

    I have a condo with a 10 year old, 40 gallon electric water heater. I have city-supplied water. Obviously I'm due for a new water heater real soon. I live in a region with very hard tap water. Whenever a water valve is open in the condo (toilet, sink, or washing machine) there is a...
  4. jimolson

    Tankless Water Heaters: Safety Certifications?

    I'm an electrical engineer whose job requires me to design and submit 240/277VAC power control products to Underwriters Laboratories for safety approval. To do my job I have to maintain constant vigilance on where the current goes when stuff gets hooked up wrong or wires accidentally break...
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