For some time, we’ve noticed that it takes a long time to get hot water at our kitchen sink. I recently measured it … 1st thing in the morning I turned our single lever faucet to max hot. About 1 minute in the water was tepid, but it wasn’t until 2 minutes that it was uncomfortable to keep my hand in the water stream.
The hot water tank is set at 135 (otherwise the length of time increases substantially) & has been verified as correct by the temperature on the output pipe. The tank is about 25 feet from the sink, down 1 floor and the pipes are insulated (which shouldn’t matter since the temperature was in the 60s overnight.
The other day I noticed something while getting something from under the sink … the size of the pipes leading up to the faucet connection tubes are of different size. The diameter of the hot water pipe is significantly smaller than the one on the cold water side. Several years ago we had a hot water tap put in and there is a “tap” off the pipe to the hot faucet side that goes to the tank. It looks like that’s when it might have been changed.
Now the question before I call in a plumber. Is this the likely cause of the lengthy delay in getting hot water?
I probably should mention that the delay is not just first thing in the morning but anytime the water is off for a long period.