For help with remodeling or new construction, contact pdq today! The company was started by alan porter a plumbing and drainage engineer with over years experience both in the domestic and commercial environments in . Thank you for using wpj heating, we wish you a great day! Combi boilers are becoming an increasingly popular choice amongst our customers across the uk due to their space-saving functionality. I never new pepsi and coke were so useful! Mix a : solution of washing up.