Hi, if it's a drain plug, don't you mean the Carver Cascade? the water heater? regardless, it sounds like a question for Gary from Arc, I'm sure he'll be along to answer shortly, otherwise you might consider cross-posting in the caravan section, he does seem to answer many question like this over there. Plus, your blue face has gone now.
A day of all things motorhome and campervan. The show is held both in the main indoor arena and across the grounds. Catering, hot drinks and food options are available. Easy access to the site and free parking included. Win one of five pairs of day tickets