There are multiple Plumbing layers to a structure. No matter how big or small the system is plumbers know the specific function of each plumbing component . These areas of the mechanical feed and have resources plumbed for all of our comfort. Once those areas begin to fail. Plumbers are hopefully at the ready to repair or replace the item at question. It could be something simle like a water leak or a difficult water heater problem. Either way Plumbers are handlers that like to Plumb when needed. www.2ThumbUpPlumbing.com