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Recent content by dfru

  1. dfru

    Tankless water heater

    If you are serving a sink, you will have to use a small storage water heater if you are limited to only 120 volts and 15 amps. An instantaneous water heater with that rating will only provide approximately 6000 btu/hr of heating. This equates to only a 24 degree F temperature rise at 0.5 gpm of...
  2. dfru

    Fire sprinkler branch outlet fitting

    There are a number of UL Listed branch outlet fittings (also called mechanical tees) on the market. These include a threaded outlet fitting connected to a "U"-bolt. These can be used in lieu of weldolets or other types of branch outlet fittings available on the market. In order to install the...
  3. dfru

    A120-84

    Where can I find a copy of A120-84? More specifically, I am interested in the allowable wall thickness for pipe under the A120-84 standard. Also, the allowable tensile strength, and percentages of constituents.

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