Hot water pressure

[neg213]

We recently had a new combi boiler fitted, but the pressure from the hot water is quite poor and gets worse the longer it runs (the cold water provides good pressure).

Got the guy out who fitted it, and he said that the pressure we were experiencing was normal and there was nothing we could do about it? I assummed that, if the cold water pressure was good, then that would result in good hot water pressure?

Is he trying to fob me off?

[buildersmate]

If your Combi is undersized, when the CH is running flat out, it is very likely the output from the boiler is struggling to cope with the total demand for heat you are putting on it This manifests itself as either a reduction in HW pressure or reduction in the temperature of the hot water being produced. If this problem is worse when the weather is cold (and hence the CH is demanding more of the heat energy) then that's certainly the cause. There isn't too much you can do about it. But the guy who installed it could have come up with a better explanation to you for the way these Combis work.

[what..the?]

I move from one rented property to the next and so try loads of showers and of average the water pressure is crap unless the shower is a so-called power shower it is either average to terrible.

I have had one very (ouch that hurt my nipple) powerful which was not a powershower I never found out way it was so strong but just so you know they do exist.

My last property the water was not hot enough so I altered the water pressure because the water was traveling through the system so fast it could not be heated to the desired temp in time. Turing the pressure down allowed the water to heat properly before it reached me (ouch thats hot!).

I think that u could try to turn the pressures up but you may lose the heat a little - I personally like it very hot!

[heathfield]

Here's how I get the same problem...Inside the boiler there's a small tank of hot water. A pipe from the cold supply passes through this tank, and so the cold water is heated and comes out of your hot tap. There's also a temperature sensor to makes sure the hot water you're getting is hot enough. But the cold water passing through the hot water tank cools the water in the tank. The temperature sensor detects that the hot water isn't hot enough, and closes a valve slightly to reduce the flow, and so try to get the water up to the required temperature. How well it's able to do this will depend on the heat rating of your boiler.