Kurt at koegel plumbing is amazing!! should have called him sooner thank you!!! It's customers voted vaillant the most reliable brand of boiler, so there's strong incentive to plump for one their models. Marriednotdead: that would involve a lot of body-brushing for many dh's! To enable us to fully assess the heating requirements of your home we’ll send a surveyor to your property, free of charge. We had an overflowing clogged toilet they came quickly and were.