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Correct pipe size on hot water heater

69K views 5 replies 5 participants last post by  Joe Tilghman 
#1 ·
Should the hot and cold water lines coming from the top of the water heater be both 3/4" if the pipe on the cold side is 1/2 can this reduce water pressure?
 
#6 ·
I think I found the problem,There is a 3/4 pipe transiioning to 3/pex. Then there is a T 3/4 PEX goes into the floor I am assuming to supply the house then the other end of the T is 1/2 which goes to the washer.

Looking closer I then found a 1/2" PEX line coming up through the floor connecting to copper then into the cold side of the hot water heater.

This is the cause of my low water pressure correct? And now I have to find what is coming into the house.
 
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