We are remodeling and have had a new gas furnace and water heater installed. The furnace was included in the overall bid, but the water heater was an add-on. Recently we've been concerned about costs, so we researched the price of the water heater, which is in the $1300 range. We were charged $3000, which included venting and installation. Does this sound very high, or is this in range? Our GC has told us that he does not tack anything on for himself, but the change order is on the GC letterhead, not the plumber's.

Any input would be appreciated!