Re: Irwin 28 head help
Since your boat did at one time have a head and holding tank, there has to be tell tale signs of where the holding tank was located. Fittings that held the tank in place...holes thru bulkheads where hoses were run, either forward under the V berth or aft under the settee...deck fittings for pump out....a hole in the side of the boat where a vent hose was connected or in the case of some boats like mine, my vent hose is connected to one of the hollow stanchions with a hole in the top of the sanction that is the vent. Where is the largest spot a holding tank will easily fit into?
There are only a few places that it will fit...I doubt it is in the cabinet you mentioned...I'm betting it is under the settee.