It's a 1/2in valve , so set it and then zip ty it so it wont close shut. ok got it thanks is 1/2 going to be okay because I did pick up a 3/4 in also.

You might be fine.

The reason I use a 3/4" valve is because it seems to have a little more adjustability and is a little less over reactive.

1/2" might work great.

The tie wrap is to prevent people from playing around while the boat's in the parking lot at Bevmo.

GT