2 weeks ago i thought my water heater was leaking. turns out it was the cold water supply to my upstairs bathroom, which damaged the kitchen ceiling, And 2 feet of 3 inch cast iron waste pipe which was in a wall in my utility room (the wall is now in the landfill) had rotted out, And the condensation tray in the air conditioning unit in my furnace had rusted through. so yeah, i'd say they travel in packs!! the water heater is fine, knock wood!!
