There are four boilers in the baxi platinum combi he a range, 24kw, 28kw, 33kw and 40kw, so whatever your needs, there'll be a boiler capable of meeting your requirements. Plumbers who are pub licensed water service plumbers (lwsps) and are not former registered plumber (env-rps) or former sps rps. Useful tips to make your everyday life just a bit better. Learn how you can help us, help you. To be certified as a plumber, you usually need to complete.