The direct energy learning center is your trusted source for a wide range of home-related topics such as energy efficiency, energy safety tips, weather preparedness, and more. Great hub! we have a couple drains running slow and haven't had a chance to buy draino yet, so these tips will be great to try! To find out more about the options available please. All existing pub lwsp and sanitary plumbers registered with singapore plumbing society (sps) are to attend a briefing conducted.