1. Turn off cold-water pipe leading into the water heater.
2. Shut off the gas supply to the heater.
3. Drain water from the heater using a garden hose.
4. Use a tubing cutter to sever the cold- and hot-water pipes connected to the heater.
5. Disconnect the union that connects the gas pipe to the heater.
6. Remove old water heater.
7. Set new heater on top of blocks.
8. Attach exhaust flue to top of heater.
9. Solder new copper pipe to connect heater to cold- and hot-water pipes.
10. Reconnect gas line to heater.
11. Install vacuum valve to top of heater; wrap threads with Teflon tape, tighten with pliers.
12. Turn on cold water to fill tank.
Difficulty: Moderate to hard
Requires basic plumbing skills and the strength to wrestle out the old heater, and carry in the new water heater.
· Time to complete: 2 to 4 hours
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