hot water heater pipe diameter

Old 02-20-06, 12:23 PM
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hot water heater pipe diameter

My electric hot water heater is about 10 years old I want to replace it before it fails or bursts. The pipe diameter of the inlet & outlet are 1" & I want to use the stainless flex pipe I've seen at the home centers but the flex pipe is only 3/4". My question is, is it ok to solder in a 1" to 3/4" reducer so I can use the flex pipe or will the reduction affect the water flow? Thanks.
Old 02-20-06, 12:25 PM
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MOST systems are all 3/4" i believe. You should be fine!
Old 02-20-06, 06:15 PM
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Water heater connections

Nearly all residential water heaters use 3/4" pipe connections. If you are measuring the outside diameter of the pipe nipples on the top of the water heater, they will be about 1" outside. Iron pipe size is measured inside.

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