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UK diy (uk.d-i-y) For the discussion of all topics related to diy (do-it-yourself) in the UK. All levels of experience and proficency are welcome to join in to ask questions or offer solutions. |
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#1
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Shower Query
Hi
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. David |
#2
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Shower Query
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#3
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Shower Query
wrote in message ups.com... Hi 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. David The previous poster suggests that the problem is that the boiler is generating more heat than is required leading it to shut itself down. If this is the case then reducing the mains flow will not help - it is equivalent to slowing down the shower flow rate and will exacerbate the situation. Does your g/f use the shower at a slower flow rate than yourself? If the modulating problem described is taking place then you want to increase the water flow rate so the boiler does not reach the maximum temperature and cut out. Another test would be to leave a hot tap running while having the shower and see if it happens then. |
#4
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Shower Query
"hzatph" wrote in message ... wrote in message ups.com... Hi 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. David The previous poster suggests that the problem is that the boiler is generating more heat than is required leading it to shut itself down. If this is the case then reducing the mains flow will not help - it is equivalent to slowing down the shower flow rate and will exacerbate the situation. Does your g/f use the shower at a slower flow rate than yourself? If the modulating problem described is taking place then you want to increase the water flow rate so the boiler does not reach the maximum temperature and cut out. Another test would be to leave a hot tap running while having the shower and see if it happens then. I find that mine starts very hot (heat rise after the thermostat is satisfied due to mass of metal) goes cool and then the boiler realises and fires up to recover. Just a bit too much lag in the responses I think. |
#6
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Shower Query
Thanks everyone
To answer your questions: - the problem does 'cycle' she said it went 'cold' (not cool) twice this morning on a hair wash day! - flow rate, nope she uses the same as me (on enough to hit sensible power, which is only a slight turn) give or take a slight margin, i will stand over her tmrw morning and double check - problem occurs no matter who showers first, for example I was first yesterday, she was first today, and the problem occured - for me, blissful shower as ever! - temp, when I use it, the temp is fine, takes 5-10secs to hit the preset temp and stays constant for the time I am in there - perfect. I would note that no other taps etc are drawing supply, just the shower. Thanks David |
#7
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Shower Query
- flow rate, nope she uses the same as me (on enough to hit sensible
power, which is only a slight turn) give or take a slight margin, i will stand over her tmrw morning and double check Tell her to use a bit more flow than usual and see what happens. Christian. |
#8
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Shower Query
Tell her to use a bit more flow than usual and see what happens. Christian Christian, I will do! I will report back tmrw morning, thanks. Regards David |
#9
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Shower Query
Tell her to use a bit more flow than usual and see what happens.
Christian Christian, I will do! I will report back tmrw morning, thanks. Regards David She used the shower this morning, with the flow rate higher, much improved went cool for a few seconds, rather than 10-20,...............what does this mean, do I have to accept it, would a better shower fix the problem? Thanks David |
#11
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Shower Query
Poor thermostatic valve in the shower, possibly not the type designed for mains pressure hot water, or perhaps just worn out. Okay, well thanks eveyone. Bottom line is she is happy with the shower now & so am I, suffice to say if it every fails I will replace with an entirely suitable/quality version. Cheers David |
#12
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Shower Query
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