My house has amazing water pressure from the cold tap. It is connected to the mains supply. I live on the second floor. My hot water pressure is not so good. I understand this is because it is a gravity fed system from a tank to the tap so there is no applied pressure.
What I am confused about is where the pressure comes from for the cold?
ETA: I am in the U.K. my hot water system comprises of a tank which is filled via mains water. The tank heats the water over night via an electric heat source. I also have an emersion heater option to heat water up if I use all of the tank in a day. The water is then gravity fed to my taps hence the low water pressure. The tank was fitted in the late 90’s.
My question was: where does the cold pressure come from? not why is my hot water pressure crap.
I couldn’t fathom how without a pump the cold pressure was high despite it having to come UP pipes to my second floor flat and how that remains consistent.
Apologies if I was unclear. 🙂
In: 1
One fallacy mentioned here is the pressure reducing valve. For these are located in the piping before entering the home. Therefore, controls pressure the same for both not and cold.
One cause of lower hot water pressure is there are more bends in the piping: Such as the inlet pipes going into the water heater; then around inside the heater, and lastly the outlet piping. All which reduces pressure somewhat.
Main factor is…. is that hot water builds up scale inside the hot water pipes, more so than with cold water. This is why with newer homes, the pressure seems same, hot and cold. But over times, scale will reduce volume and pressure with the hot water pipes.
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