Dump the hot water down the drain so that it can melt away some of that grime and any hardened grease if this method appears to work for the clog, continue doing so until you've got the drain cleared! For a no obligation estimate please call freephone or. They’ll run diagnostics to figure out exactly where the fault is coming from. What does a landlord gas safety inspection include? Cemline electric boilers are thoroughly tested prior to shipment all components and.