During my investigations to find out why my CH wasn't working I isolated the pump by turning off the two valves either side of it. I never actually removed the pump (nuts were so tight I gave up) but unfortunately there is now a small leak from the downstream valve and it looks like it may have to be replaced. The leak is coming from the spindle which rotates the valve (the spindle is rectangular, 7mm x 3mm). Any way of sealing this short term since I am getting the entire system replaced in about 3-4 months. If not then what needs to be done to stop water going everywhere when I remove the pump and the valve. Any tips on how to untighten the pump nuts would also be very welcome.