20 sf bait tank ?

[Mikem8560]

My 1982 20' sf has a bait tank I. The rear floor. There was the remains if a airiator In there the kind that sprays water to make bubbles.
And on the transome above the hull drain there is a fitting with a plug in it.seen here

on the starboard side next to the bildge pump exit is a capped off through hull
I'm wondering how theese were set up was thus capped hole a drain hole?
Ever tank I've had you turned it on the tank filled and ocerlowed out a drain hole I cat see how this could work or take in water while running

[Mikem8560]

BatWHat did it just recifculate the water and make bubbles ? Not fresh water continuasly ?

[Blue_Heron]

I've got mine set up to pump water out of the bait well. Water comes in through the transom drain. Pump is controlled by a float switch mounted inside a home made aluminum housing to keep the bait from getting stuck under the float.



Dave

[Mikem8560]

Hanks for the pic.
Can you explain furthur You pump water out doese it pump n or just floe in from transome hole. Doese it flow in and out ?
I've had tanks that circulated in and out continusly I dint see how this could without a new throughthull

[eggsuckindog]

The in floor wells work better to have the pump pumping water out of the well. That eliminates the worry of the drain - they always come in easy getting it out is harder LOL

Having a flow control on the thru hull will allow for you to control the water height to keep it from overflowing easier

[Blue_Heron]

Can you explain furthur

The vertical tube is plugged into the hole that goes out the transom. When anchored or drifting, water comes in through the tube and fills the well. The float switch cycles the pump on and off to maintain the water level. When I want to drain the well, I pull out the tube when the boat is on plane or on the trailer.

The hole to the port side of the tube is connected to a clamshell through hull pickup. There's a pvc ball valve in the line that I use to control how much water flows into the well while the boat is on plane. As water comes into the well on plane, it overflows through the vertical tube and out the transom. If water is flowing in faster than it can flow out through the vertical tube, the float switch will activate the pump.
Dave

[Mikem8560]

O blue heron I understand thebwater enter from a clamshell but if your anchored do you meen you have no flow and the water enter from the transome drain hole ?
Perhaps that why on mine someone had a airator pump

[Mikem8560]

The in floor wells work better to have the pump pumping water out of the well. That eliminates the worry of the drain - they always come in easy getting it out is harder LOL

Having a flow control on the thru hull will allow for you to control the water
height to keep it from overflowing easier

so Egg not having a clamshell as blue heron just the transome hole the the capped off hole next to my bildge exit how would you plumb it please?

[Blue_Heron]

...but if your anchored do you meen you have no flow and the water enter from the transome drain hole ?
Perhaps that why on mine someone had a airator pump

At rest, the waterline as just above the deck. The pump keeps the water level about 3" below the deck. Even with only 3" of hydrostatic head, the water flows in through the transom pretty well. And you don't really need water flow when you're on plane. The water sloshes around enough to aerate it.
Dave

[Mikem8560]

So what do you do Dave while on plane with bait in the tank do you have a valve so the water dosent drain out the transome hole were it comes in?