Trophy 2159 water tank drain?

[Degree of Freedom]

Recently bought an old 2159...can't seem to find a way to drain the water tank...surely I don't have to empty it through the tap?[?]

 

[TenMile]

Options are:

1. The tap.
2. Syphon via the filler (won't get all the water however).
3. Disconnect plumbing at the tank.

TenMile
<'((((><

 

[Degree of Freedom]

thanks...so what you're saying is there's no drain valve...didn't think so, but seems kinda dumb.

 

[spring time]

ya trophy are great boats but they don't think things threw