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Instant Hot Water: Point-of-Use System Preparation Instant Hot Water: Point-of-Use System Preparation From "Ed the Plumber" episode DETP-109

Formula for determining how much hot water is wasted daily.

Ed explains how to prepare for installing a point-of-use system under your sink.

Materials:

One gallon bucket
Stop-watch

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	Figure A
	Figure B

Before installing a point-of-use system, time how long it takes to fill up a one-gallon bucket (figure A) using a faucet at the greatest distance from the water heater. Next, record the time it takes to get hot water. Multiply the two numbers together, then multiply that number by 10 (average number of uses per day). This will give you the number of gallons wasted every day waiting on hot water.

Note: be sure to follow your local plumbing codes before installing a point-of-use water heater.

1. Clean out the area under the sink if needed.
   
2. Next, shut off the water under the sink (figure B).
   
3. Turn off the electricity to the area at the breaker.