Hello Everyone I spent some hours yesterday fitting a new filling loop, including draining the entire system and refilling with added inhibitor. All seemed to go well except right at the end i noticed a tee joint was seeping slightly - a joint i soldered some 7 years ago. It's a joint near the hot water outlet at the top of the boiler. It tees off the upstairs supply and in a really awkward spot. Is there any way i can drain off the water pipes without draining the entire CH system? I seem to remember having to wait for an hours last time for an interminable drip to stop before the joint could be soldered - maybe i didn't wait long enough! Anyway, i'd be very grateful for any tips. Thanks.