i've just had a newish hot water cylinder fitted by a qualified plummer (allegedly) he had to fit new couplings etc. now every few days the hot water goes cold, to get it going again i drain of a couple of pints from the drain valve outside and its ok for afew days.c/h works ok.boiler is 6 years old, the hot water is gravity fed from boiler(cylinder directly above)old cylinder had larger bore fittings,boiler is a IDEAL classic. Had a problem with pump sraight after plummer left, impeller came of motor.after he suspiciously adjusted pump on his way out through kitchen,(coincidece) thankful for any advice By newish less than 6 months old. mate had new combi boiler fitted.
