SeaSense Bilge Pump Plumbing Kit 1-1/8 X 6 Foot

would this work to empty water out of a boat my uncle turned into a backyard pond?

I need to put a ball valve on this between my tsunami 1200 and my sluice, any recommendations? Could this hose accommodate a 1-1/4 inch barbed adapte?

what size hole do i drill to install this?

Can i use this hose for "seasense hand bilge pump hose" ? i need a longer hose than what came with my bilge pump.