Jim K formulated the question :
Harry Bloomfield Wrote in message:
Jim K laid this down on his screen :
Ring me & ask

How might I do that?

Using a telephone usually works best...

What is your phone number?

0330 123 3366

The Worcester / Bosch helpline...

....and they say there is no such condition to their boiler being
installed, so long as the pressure is maintained above their minimum
specified pressure with all appliances in operation. No doubt it will.