"Charlie" wrote in message
oups.com...
Ok, so in sumary it is illegal to pump from the mains... But then i
have to ask, should I still be using a pressure washer?? still the
point is moot...

Pressure washers do (or should) cut out when the input pressure drops too
far (mine certainly does)


I dont think the water supply being replaced is really an option,
sounds a bit of a nightmare... anyway the house is only 5 years old...
so what could possibly need replacing...

I think i will get a single sided pump and just boost the hot....

although i am intrigued, is pumping the mains just illegal, of does it
have physical consequences too?

Yes. All water mains leak somewhere by small amounts. This is not a problem
as they are always under positive pressure and clean water is always flowing
out through the leaks. If someone puts a pump on the incoming main, there is
the disnct possibility of getting negative pressure (ie below that in the
pipe's surroundings) in the pipe. At this point contaminants will be drawn
in through the leaks, contaminating your (and other people's) drinking
water.

It is illegal, very antisocial and possibly dangerous.


--
Bob Mannix
(anti-spam is as easy as 1-2-3 - not)