Yacht owners sometimes want to have a wall heated instead of towel radiator.
This could arise, because the floor surface in this area is too small to become sufficient thermal power from the floor, or a towel radiator they just don’t like.
If t yacht owner has chosen for wall heating, the wall must be present, but not posted a time of the floor heating installation.
This wall will be treated like a hatch, conducted with 2 ball-valves and YFH stainless steel flex hoses and finally pressurized .
In later stage this wall can when required and under pressure be back posted by the shipyard/carpenter and directly under pressure connected to the floor heating system.