Could some explain procedure for draining down system with combi boiler
I have tried once before but the water flows very slowly and seems to take forever. In addition how do I know when all the water is out as there was a trickle for 1 hour or so and not sure if all water was out.
do I have to make pump operate for short time if so how?
PS about to add inhibitor Sentinel or fernox best?
Many Thanks for any replies
I have tried once before but the water flows very slowly and seems to take forever. In addition how do I know when all the water is out as there was a trickle for 1 hour or so and not sure if all water was out.
do I have to make pump operate for short time if so how?
PS about to add inhibitor Sentinel or fernox best?
Many Thanks for any replies