Ugh, not good Magpie! Kill tank should be plumbed to drain out the side is there a connection fault or anything? Seems bizarre that it would drain into your hull. What's the tub?

Yes it should drain to the outside of the hull......

sound like it needs a little plumbing work.

My leisure cat has kill tanks. It has a drain hole that is plumbed to the outside. When at rest it will fill half way untill it reaches the water line height.

When I am cruising the water will drain out. If I want to keep the water in the tank there is a valve under the deck that will stop the water from emptying through the drain.

I use a rubber plug instead of the valve so I don't have to keep sticking my hand under the deck through the inspection hatch.

Not good mate . Is your boat alloy of fibreglass ? Maby a fitting has come loose. Can you access under the floor ?

I think you're right on both counts;

1) Some boats drain their kill tanks into the hull
2) Its so very wrong!

 Thanks for all the comments It looks like I need plumbing. Does any of you know where I can get this done as I'm new to kill tanks and this looks like a fault design in my boat.

It is a ripper boat (fibreglass) and handles it all the ocean dishes up but I being me need the total package. So where do I go to remedy this problem.

John if you can access the tank fix it your self. Some kill tanks do flow into the hull ( why they do this god only knows )

Plum the overflow out of the hull ( above the water line if possible ) or use a non return valve and exit near the bung plugs.

If your not sure then get a boat fitter to do the job, I cant help you with a contact sorry maby some one else can.

Im not an expert on this but i always look at the problem my self, then if i cant fix it, I take it  to an expert.

Needs to go to a glasser really. You could do it yourself if you had the skills.

The hard thing is you're really talking about putting a hole in your hull below the waterline and thats why its some tanks drain into the hull, not out of the boat.

Do you know if the kill tanks are glassed into either the bottom or the side?

Are their drains in the side, or the bottom?

Would it not be easier to put in a removable plug, (like the bung plug at the stern of your boat), and fill the killtank with ice before fishing then scoop it out of the dirty blood-guts- water residue after fishing expedition is finnished.

Then remove bung and give it a final hose if needed with draining through the bottom hull.

If it has a drain through the hull then it must have a decent closing valve on it as leaving it open will fill the boat with water!??

I do know the Boston Whaler has this setup with the danger of flooding if valve is left open!

Boat builder ph 94379980 see if he will help,I think he might

my boat has that fantastic idea . so the "kill tank" is now unused .  always dislike the idea of the kill tank as it's not that easy to clean out and stink up the place

i bleed the fish into the live bait well (great idea jamie) and then into slurry in removable esky

cleaning then easy

In floor bait wells usually have a hole thru the hull.  The design of the boat must have the deck above the float/water line.  Water will only come up to the float line.  The advantage of this type of well is that there is constant freshwater in the tank.  Live bait will stay alive for days with this type of bait well, I know as I had this in my 28ft center consul back in Singapore. The bait well must be properly sealed at the deck joint so that water does not get into the bilge. The key disadvantage is that when you move, the bait well will drain if you forget to plug it, so you need a plug, siphon level tube or check valve to control the water loss when moving.  The other is that you are on your knees to scoop bait.  Having said that they are my preferred type of bait well.

If you forget the bung on a Boston Whaler, water will get into the bilge if that model has one, but not flood the boat.  There is a model that will flood, I think it's called "another brand".

The kill tanks will fill with water if the bungs are out, but should not flood the boat. 

Some folks use the kill tank as coolers. if you do it's best to plug the thru hull and put in a pump, to pump out the melted ice and blood.  Most of the Whaler guys that have kill tanks (most BWs usually have 2 if they have them) will use one as a kill tank and the other as a fish hold.

I have the Savage defender 5.5 and it has exactly that , a kill tank or storage hold as I like to call it that drains into the the area under the fuel tank and back to the transom.

I thought about trying a few things to convert it but thought bugger it too hard basket. I just put a large plastic container that fits pretty good in there for when we are squidding and catching smaller fish and just lift up the floor peice and throw the goods in there , if any water splashes out and down to the transom just flick the bilge pump on and it drains in a couple of seconds.

I have a whiting story as well , my daughter some how managed to get a small whiting through a gap which seemed impossible and it ended up down the side of the fuel tank and the only way to get it out was cut the carpet along the large cover that is above the fuel tank and unscrew the hatch and use a wire coat hanger straightened out to spear the near green whiting . We were in walpole at the time so wasnt going to rip up the floor on holidays , had to wait untill we got home. 

Cheers

Gazza

My Southwind has a storage area I guess that could be a kill tank, and it drains into the hull. Having said that the fuel filler pipe passes across the top of it so I use it for general/anchor staorage. Maybe Rod knows if it was intended for use as a kill tank?

The kill tanks on in a BW is a purpose built unit that does not open up into the bilge or hull.