Use our homeowner checklist for extra tips on choosing a tradesperson. Alameda zip codes include: 94501, 94502. Pour about ½ cup of liquid soap down the drain and wait 5 minutes so that the soap can get down into whatever is in the drain then carefully pour boiling water into the drain, being sure it doesn’t splash and burn you. S railway ave vergas, mn 56587. Sometimes your boiler doesn’t provide enough heat.