We have an offer on an investment house that we are selling. The buyers have commissioned a building inspection report, at which time the inspector told them that the HWS system was leaking (this is not mentioned in their written report). The special conditions on the O & A state that all plumbing must be in working order. The hot water system is in working order. Do we need to fix the leak or replace the HWS. If the leak cannot be fixed (Solar HWS is very old), do we need to replace it?