On 28/01/2018 19:28, alan_m wrote:
On 28/01/2018 12:43, jim wrote:


Worth a look but I can't think why that doesn't happen when sink
or bath taps operated?


Shower and toilet fed from the rising main, sink and bath taps fed froma
tank in the loft????


Unlikely, if it's a mains-pressure hot water system.
--
Cheers,
Roger
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