I have a worcester 28i junior, It seems to have a leek in the black plastic casing which the pump is bolted onto, is there a shut off vale to the pump or do I have to drain the system If so how do I do this, I know there is a drain tap on the pump is this what I use to drain the system?

maddog, January 2009

Drain points are usually at the lowest point in the system - sometimes below the floor. Look for that first.
You could also check if there is an isolator on either side of the pump (or on entry / exit to the boiler) - if there is then you should be able to close these off to leave water in the system and only have to deal with the small amount in the pump (boiler).

Richard, January 2009