I recently purchased a refurbished top (2nd) floor flat and have a little issue with the shower, which I would appreciate your opinions on (I would note I have no plumbing knowledge!):
I should set out the following I suspect:
The water main is 22mm in diameter (new stopcock- fitted by our family plumber recently, fully on and back half a turn), this connects to a (sept 2004) Worcester Junior 24i combi, serviced by them last week. This was said to be fine when serviced. Hot water taps and rads all function fine. The problem pre/post-dates the service.
There is what I believe to be a 'thermostatic' shower in the cubicle. It's a chrome bar with a flow knob at one end, temp the other. No brand name apparent. Again late 2004 install.
I have used it everyday for the month we've been in, set at c. 34degrees and flow i guess on just enough to be a sensible power (which is very nice indeed). No problem.
However, when my girlfriend uses it, which of course takes longer, at the same temp and flow rate, the shower goes cold/cool for 10-20seconds, after a while, then warms up again. I would note NO other taps/rads are on at this time of the morning in 'our' flat. This happens every day to her, never me.
I have read various posts/talked to people and various things have been suggested, including
- reducing the mains flow (bolier manual) which will increase water temp? - remove a 'flow restrictor' from the boiler, (worcester engineer) as he thought the hot water tap in the kitchen seemed a little cool/slow (i have not noticed this, but he knows what he's doing!). - replace wax thingy in shower unit??
Thanks for your time.