Ed Sirett wrote:
On Mon, 26 Jan 2009 23:16:36 +0000, fictitious wrote:

On Mon, 26 Jan 2009 22:07:02 -0000, "Arthur2"
wrote:

Hi all.
The wife often lets our 6 year soak in the bath water while the
shower continues to flow whilst submerged. Does this have a
detrimental effect on the combi?

Thanks.

Arthur


Thought that was against water regulations because of possible back
syphoning ?


AIUI this is not a problem provided one of the following is met.


1) The installation can't back syphon because the hose can't reach.
2) The shower is electric or has built in non-return valves.
3) The shower is not run from the mains water.

(2) seems to apply here as the mixer is a bar mixer which have NRVs in
them. As do /most/ thermostatic mixers.

I've had numerous run ins with Water Board twonks who wouldn't accept the
three inlet & three oulet vales in the pump head of a pressure washer as
accceptable.


--
Dave - The Medway Handyman
www.medwayhandyman.co.uk