On 23 Sep 2006 03:48:11 -0700 someone who may be "al"
wrote this:-

I have a sealed pressurized heating system

Hopefully it is not sealed, but has the variety of safety devices
specified for such systems.

Any help would be greatly appreciated

Get somebody who knows what they are doing to look at it. Hot water
under pressure is not something to experiment with.


--
David Hansen, Edinburgh
I will *always* explain revoked encryption keys, unless RIP prevents me
http://www.opsi.gov.uk/acts/acts2000/00023--e.htm#54