Looking for baxi boiler spares? then look no further than direct heating supplies! If you are considering replacing an old boiler and require a no obligation estimate, please call or. My drain is not fom the kitchen sink, it is at the front of the house and is just rain water and dirt.it takes ages to soak away.what should i use? The engineer didn't check the boiler’s pressure point for leaks - a legal requirement after adjusting the burner pressure he failed to follow the manufacturer’s servicing.