Originally Posted by Capn Courage
One tip I came across on another forum regarding winterizing when you have the larger size water filter cannister was to put an empty plastic bottle with the top on it in the cannister before adding the antifreeze, cuts down on the amount of antifreeze required. I,m guessing this would also help if you didn't use antifreeze as the force of the water freezing would crush the plastic bottle before it busted the cannister housing.
Hey that's a pretty good tip! I've never installed the cartridge in ours, so just let the canister fill up with antifreeze along with the rest of the plumbing. I know it's a waste of a couple of litres but the pop bottle trick could cut that sown considerably.