I did this on my '98 Wilderness and plan to do so on my '06 Montana as soon as it warms up again. I only do the cold water, as I have a sink in my gas grill. Bought PEX fittings to go from the low point drain to a valve, to a garden hose fitting, which is the fitting my grill sink uses. Five gallon pail handles the drain, which will usually last a weekend before needing emptying. Works great for hand washing and the kids love it for filling their super soakers too.