Hello all i hope someone can help me please i have a Glowworm 30 ci plus boiler and have noticed a small drip which is leaking on the floor now on closer inspection i have noticed a very fine spray coming out of a black plastic part in the boiler.I have looked at my manual which was left with me and i cant seem to locate and name the same component the only thing i can identify is the gas valve,and the leaking part is at the very back of this gas valve and the copper pipe which is conected to the leaking part is the domestic hot water outlet.So could anyone tell me if this part is called many thanks.Please Please any help would be great .