Hi all,
When I turn on the hot water tap in the shower, water comes out normally but after around 10 seconds the pressure starts dropping dramatically, to the point that it will slow to a trickle after another 10 seconds or so. If I then turn on the cold tap I can turn up the hot water tap to the point that I can have a comfortable shower with good water pressure, but you can feel the hot water "dropping out" over the course of the shower so that you need to continue turning up the hot water or turning down the cold water.
It seems odd that the hot water pressure will drop to a trickle when it's the only tap turned on, but if you have both taps on it doesn't drop out entirely at the same rate leaving only cold water, if that makes sense. Any suggestions would be welcome! Google hasn't been much help as I'm not sure how to word the question in a search engine friendly way.
