Hi guys,
My HW started heating up whenever the CH was on. I diagnosed a faulty zone valve on the HW side (old Drayton model). I have an S plan unvented system. I pulled off the actuator for the HW valve, but when the valve was manually closed it still charged the HW tank. I plan to change both valves for Honeywells, but the CH valve in particular is really corroded at the pipe joints. Also the HW valve seems to be blocked from above with a few drips of solder. I assume I can release the corroded CH valve by cleaning of the excess crap, using a penetrating lubricant and a load of elbow grease? Re the HW valve, can you 'mop' up excess solder by heating it first, or is this risky? I've added some pictures below. Thanks for any help you can offer. Rob.
My HW started heating up whenever the CH was on. I diagnosed a faulty zone valve on the HW side (old Drayton model). I have an S plan unvented system. I pulled off the actuator for the HW valve, but when the valve was manually closed it still charged the HW tank. I plan to change both valves for Honeywells, but the CH valve in particular is really corroded at the pipe joints. Also the HW valve seems to be blocked from above with a few drips of solder. I assume I can release the corroded CH valve by cleaning of the excess crap, using a penetrating lubricant and a load of elbow grease? Re the HW valve, can you 'mop' up excess solder by heating it first, or is this risky? I've added some pictures below. Thanks for any help you can offer. Rob.