"Christian McArdle" wrote in message
. net...
Looks like order a "2 port valve then"

Before designing the system you need to determine

(a) Will your boiler be safe with a valve on the hot water circuit. Some
older boilers (and most more recent solid fuel ones) will not be safe.

Checked boiler manual and it shows an "optional" zone valve on the CH
circuit. Boiler is not too old (potterton profile)

(b) Will the planned circuit still be safe in terms of boiler venting and
water supply? If not, is an alternative pipe routing possible?

Valve would not affect venting/feed.

In additional there is an overheat thermostat on the boiler.