I have a 1973 model which has 100 gallon fresh water tank fiber glassed beneath the floor in the rear stateroom. My normal winterization method is to drain and  bypass the hot water tank. Then pump all the water out. Then I put 10 gallons of -50 Propylene glycol into the water tank and pump that through all the fixtures.

That works, but uses a lot of antifreeze and is a bit of a pain to get the antifreeze out of the system in the spring.

I was thinking of changing my method of adding antifreeze. Instead of putting it into the main tank,  put it in a bucket then use the pump to distribute it through the system from the bucket. This leaves about 20 ft of rubber hose between the main tank and the pump unprotected.. 

Has anyone done something like this? Looking on line all the articles seem to use the main tank.

Thanks

John Brock

1973 410

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I never liked the idea of filling my water tank with antifreeze, even if it is non-toxic. On many different boats I have always pulled the hose at the intake side of the pump and let the tank drain. After bypassing the hot water heater, I attach a hose from a five gallon bucket to the pump and fill the system. The only time I ever had a problem was the year I forgot to run the fresh water wash down in the cockpit on my Luhrs. Burst a hose that was very hard to access. My hose run from tank to pump has never been more then 6 feet. 

John, I also have a 100 gal tank in our 41 Roamer Regal. I drain all the water out of the system that I can, then I dump a case of the pink non haz antifreeze into the tank, I let the pump push it thru all faucets and toilet (vacuflush), Once all fittings show solid pink I let the rest go thru the toilet and into the holding tank. I do this just before pull out. I get the holding tank pumped out before and after winterizing the water system. A case of pink is cheap insurance against freeze damage, and the system is ready to go in the spring. 

I have a 45 Commander. I drain the water tank and the hot water tank. Then connect a by pass on hot water tank. I also installed a by pass faucet on the fresh water pipe in the engine compartment which leads to the fresh water pump.  I open the by pass faucet and drain the residual water from the tank into the bilge . Finally I remove the bottom plug to allow the bilge to drain dry

For the plumbing , I pump pink through the direct water connection using a spare water pump and a car battery ( my fresh water intake is located in the bow storage locker) - open all taps till pink flows.don’t forget to activate the windshield washer if you have one and wash down pumps and faucets.

i prepared and laminated a checklist for all items including battery disconnect. Very useful

 I am located in Montreal and we get extreme freezing. I have not had any problem. 

I forgot to mention that I bypass and drain the water heater before I add the antifreeze  

Dan Stokely said:

John, I also have a 100 gal tank in our 41 Roamer Regal. I drain all the water out of the system that I can, then I dump a case of the pink non haz antifreeze into the tank, I let the pump push it thru all faucets and toilet (vacuflush), Once all fittings show solid pink I let the rest go thru the toilet and into the holding tank. I do this just before pull out. I get the holding tank pumped out before and after winterizing the water system. A case of pink is cheap insurance against freeze damage, and the system is ready to go in the spring. 

I use 10 gallons to winterize. I drain the water tank down with the pump, add 2-3 gallons of the RV antifreeze into the tank. I also use a pump to put 2 gallon RV antifreeze from the water inlet through the pressure valves, back-flow preventers and cycle the shore / tank valve and the fill valve for the tank all located port side in my galley exterior cabinet. Then 2-3 more gallons pumped with my 12 volt water pump out all fixtures(don't forget the windshield wash down) and any exterior wash-down outlets. My remaining 4 gallons gets added to two heads, and then whatever is left poured into the deck-side pump out fitting and into the Black water tank. I also set up my water heater bypass with this kit available on Amazon for $21.00. I just needed two brass nipples to install it on the hot water heater.

Camco 35953 8" Supreme Permanent By-Pass Kit for 6 Gallon Tank - Lead Free
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