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hot water temp?

when the combi boiler is heating the hot water for the shower or hot water tap the temp varies between warm and hot and as only started to do this after a plumber drained the system to fit a new water pressure switch.
kevin, January 2010
flow cup / weir gauge

Ian, January 2010
how wud i test this other than doing a flow test using a liter bottle and timing how long it takes to fill up with the hot water ta on full.

kevin, January 2010
check that the flow rate is not too high, around 9 - 10 litres per min for most boilers.

Ian, January 2010