3500 sq foot house. I have 3/4 inch into the hot water tank, then into
wall, where it probably reduces to 1/2 inch. everything I see anywhere
in the house, crawl space, hot or cold is 1/2 inch. Cold water volume
is OK. Turn any faucet, to full hot and the volume is instantly
reduced, not the same as full cold. Shouldn't be though, the volume
into hot water tank is the same as the volume into the cold side of any
faucet, it just goes through the hot water tank first. How can I check
whatever needs to be checked, where ever it is. Could there be a
restricter on the hot water line in the wall I can't see, don't think so
though.

Any thoughts

Thanks
Bob