The best way, however, to keep your drains clean is to call your reputable plumbers and ask for a drain cleaning service. More than just the drain, professionals can also handle other plumbing and piping systems as well. They can keep your drain clean without using environmentally harmful chemicals. The use of specialized equipment's such as high pressure jet systems and special lances will leave your drain squeaky clean. Among the plumbing items that you must keep clean, the water tank must top your list. Have it cleaned regularly together with your drain pipes.