Hi everyone, I am trying to get antifreeze into my fresh water tank on the boat so I can winterize the tank and lines.

The problem is, the only inlet for the water is a connect for a garden hose... and it needs the pressure from the city water to fill the tank.

Anyone have any ideas or suggestions on how to get anti-freeze in there?

Thanks in advance!

You don't have a deck fill? I've never heard of a boat that didn't have one somewhere.

That is really strange that there is no deck fill. Can you access the top of the tank and pour straight in there? depending on how long the run is from the hose connection to the tank, it should drain into the tank, and I would not really be worried about that section freezing. On the carver we use the deck fill then run all the faucets, showers, toilets, then drain the system.

I cannot seem to find a deck fill anywhere.

There are the deck fills on each side for the gas. Then the water fill area that is strictly a hose connection, back near where you plug in the shore power.


I talked with the previous owner... he found the water tank ventilation hose and said he always poured in his antifreeze in there.

I was thinking about just going to Ace Hardware and getting a small electric water pump and using that to put it in through the hose connection on the back of the boat..!?

put a shop vac on the blow side,turn on all the spickets in the boat,put the shop vac over the hose inlet and apply pressure over the outside fitting with the shop vac hose and see if it will pressurise the system..when the spickets stop draining get a small funnel and try to fill it with rv antifreeze then blow it through the lines again with the shop vac..

ps dont forget the generator coolers of you have one..

I once put an extra bilge pump in the bottom of a 5 gallon bucket connected to an outlet hose and wired to a jump box to force antifreeze in somewhere....maybe that would work for you?

I have a Fountain Lightning with exactly the same set up. I bought a short length of garden hose, a medium funnel, and a hose clamp. I put them all together, hooked up the the inlet, and poured four gallons of pink stuff into the fresh water tank. I then ran the faucets and vacuflush until they were solid pink color. Done.

I haven't seen a Formula set up like that but I have seen a Fountain like that and as billeickmann says, you don't need pressure, just pour the A/F through a hose into the tank.

Did you look under the kid that covers the anchor windlass?

Did you look on the port side down by the transom shower?
That's where mine is on the 370