Mixer shower hot water problems...

jim_bhp · 14 May 2006

Hi guys, i was wondering if anyone could help me?
I currently have a mixer shower fitted in our house (OE), recently however for some reason every now and then the hot water supply to it seems to lose all pressure.
All the hot water taps in the house function perfectly and have plenty of pressure. It recieves it's supply direct from the cylinder via an overhead pipe (in the loft). I believe it is an indirect cylinder system with a cp51 pump attached to it. When the shower is lowered (when no pressure) it regains flow. The showerhead and pipe are not blocked. No other appliances are on when this happens.
Any suggestions would be greatly appreciated.

Al-Glasgow · 14 May 2006

Has the shower actually worked successfully for a period of time ?.

The pump you mention, is this a dedicated shower pump, or for the CH/DHW ?.

Al

meldrew's_mate · 15 May 2006

Probably an air lock in the overhead pipework caused by poor design. Lower the point where the hot water pipe to the shower joins the main HW pipe so it is lower than the top of the cylinder.

dotto · 15 May 2006

jim_bhp said:
Hi guys, i was wondering if anyone could help me?
I currently have a mixer shower fitted in our house (OE), recently however for some reason every now and then the hot water supply to it seems to lose all pressure.
All the hot water taps in the house function perfectly and have plenty of pressure. It recieves it's supply direct from the cylinder via an overhead pipe (in the loft). I believe it is an indirect cylinder system with a cp51 pump attached to it. When the shower is lowered (when no pressure) it regains flow. The showerhead and pipe are not blocked. No other appliances are on when this happens.
Any suggestions would be greatly appreciated.

There should be a minimum distance of 1 meter (head)between the bottom of your cold water storage cistern in the loft and the shower head to have some pressure, otherwise you won't have any pressure and therefore no water flow. That is probably why, when you lower the shower head you get a flow, because by doing that you are increasing the head.

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Mixer shower hot water problems...

jim_bhp

Al-Glasgow

meldrew's_mate

dotto

DIYnot Local

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