I would think you would need a diverter valve so you could choose your source. Or, do away with the Alde altogether. I wonder why you are using a pump and have not plumbed into the mains. As I remember, the van is permanently pitched by the house.
I think my modern Alde is 7 litre. We have two submarine style showers with a 10 min gap in between, all from 1 aquaroll. So it should cope well.
John
I think my modern Alde is 7 litre. We have two submarine style showers with a 10 min gap in between, all from 1 aquaroll. So it should cope well.
John