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A second heater or adding a recirculating loop will solve the problem for a price... luxury costs.
I've experienced an increase in hot water issues since converting all the properties I manage to Low Flow Shower Heads and Sink Aerators.
Being Low Flow means it takes longer for the hot water to reach the faucet because not as much water can travel through the pipe.
Also, I came across a home where the family re-piped with copper and used used 3/4 inch lines everywhere. A larger water line on the hot side of the water heater stores a greater volume of water and standing water will be cold.
First, I doubt if it is the hot water tank if the kitchen sink gets hot water. If there is hot water, the tank should be fine. There are some things we do not know here.
1) Is the hot water tank gas or electric? If gas (or even electric), it should be partially drained for sediment every so often. If electric, check to see if both elements are working. If one is out, the other one needs to work harder. The kitchen sink MAY get hot water because it is asking for much less at a time then a bath. Is there a separate point of use heater for the kitchen?
2) Are the bathrooms far from the tank? Are the pipes in a slab? Does the bathroom SINK get hot? If the bathroom sink gets good hot water, then for sure it is the anti-scald adjustment on the tub/shower valves. If the bathroom sink does not get hot either, then I would check the pipes or water heater.
Lastly, it should be noted that this thread is over a year old.......
Fist thing is to see if your shower fixtures have a control on the heat of the water; often called anti-scald Other than that its likely a case of how much water heated goes to the bathroom by the pluimbing of the pipes. Not unusual for those distant fron the heater to take longer but they should get hot in time.
Location: where nothin ever grows. no rain or rivers flow, TX
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find the water manifold aka distribution block, normally near the heater, maybe in another room/closet . make sure the ones the supplies your bathrooms are turned wide open
Bath tub water is lucrative warm and the bath sick, kitchen is hot.
I'm lost on this sentence...
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