- WholeHome members can rest easy knowing their plumbing systems are secure. This visit focuses on your water heater, tanked or tankless. For tankless units we flush and descale the system, clean the flame rod and igniter, inspect the cold water screen and exhaust, check for error codes and run a hot water test to verify operation. For tanked water heaters, we drain sediment, verify temperature settings, clean combustion zones, and confirm operation by relighting the pilot, or resetting the breaker. The result, safe, consistent hot water and a system built to last.