I have done many small plumbing repairs on my home over the years. I replaced the water heater a while back and always wondered about something. Like all tanks it came with 3/4 inch connections on both the cold and hot side. On my old tank the 3/4 hot side reduced right away to 1/2 inch. I connected the new water heater the same way. I assume all my hot water distribution is 1/2 inch. I checked with neighbors and friends and all their water heaters reduce the hot side right away to 1/2 inch too. Is there a reason for the reduction to 1/2 inch? Why make it with 3/4 hot connection if the the standard practice is to reduce it within two of feet of the hot connection. I thought it may be a safety issue such as keeping the tank filled so the heating element doe not get exposed or something. I have good pressure at the 1 inch service line coming in (76 PSI and 25 GPM). The reason I am asking is that I am gearing up to do some major repiping and wondered if the hot water can be distributed with 3/4 instead of 1/2 inch. Right now when somebody takes a shower and someone else in the house turns on hot water you hear screaming
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Water Heater Question