Draining down!

We do not between sites,but it depends ,how near the mptml you are when traveling

Providing the cassette isn’t near full, it won’t hurt to tow with water in it but why not set off with it empty to give you greater capacity for use when you need it?

I’d not empty the flush or any other tanks you may have unless you're weight critical.

First of all, does your van have what’s called an on board water tank? If it does, then travel with it empty to avoid the large quantity of water moving around, it can make a difference to how the van tows, if it doesn’t have baffles. You can simply travel with a small water container inside the van for any cups of tea or hand washes while enroute. If you have a system where you use a water barrel, then don’t fill this, but fill up and connect when you get to Site. Again, a small amount of water for travelling. We used to travel with a loo ready to use, for any breaks, if it flushes from an on board system, simply flush with a container until you get to site, then set up as normal.

The three main things are, don’t have a large amount of water onboard when travelling, keep an eye on your weight, and don’t have water standing for weeks in your system. Some outfits are only used a few times a year, so best to freshen things up.😁 Enjoy yourselves, it will soon all be second nature.

I don’t know what the yellow drain valve is on your van but please do not travel with any drain valves open as this will drain the contents onto the Highway - a big no, no.

PS. I think you need to study your handbook to find out what's what. 👍🏻

Yours is a new modern well built van AD, and a few inches possibly won’t make that much difference as it might well have baffles in. Our old larger Cotswold Windrush had an onboard tank, a large one, and it made a big difference towing it back. I found out the hard way we had forgotten to empty tank one journey home, it increased the pitching quite substantially, and of course I got travel sick.
It took us a while to fathom out what the problem was, then OH recalled the Summer he had to go and collect and use a Green Goddess Fire Engine to fight a big peat moor fire. They carried hundreds of gallons, but weren’t safe above 30mph when full, as they had no baffles in tanks, so you got a pull-push effect from all the water onboard🤢 A convoy of around 15 of these old beauties, all crawling up the M1 from storage to Thorne Moors.....

Probably a good towing combination then, long vehicle, long van, less pitching.👍

The yellow drain valve next to your water heater,can be open when travelling, as it is just the water from your hot tank,if.you also open your taps  it will also emptymost of ,the water from your pipes,if you really need to

When you refill the system from your aquaroll,,always put the pump into water before pluging it. Into the inlet on the C/van as this will very much the chance of an air lock In system

Travel with any tank filled to the brim then there's no room for slopping about.  It's probably one of those "all or nothing" situations.

I start my drain-down as soon as I have finished with water in the caravan and before other jobs, mirrors on the car, electric cable etc etc. If I'm on a hardstanding I will let it drain out there but if we're on grass I switch off the heater and then run the hot water through the sink with cold water from the aquaroll replacing the hot in the boiler and then into the wastemaster to save ruining the grass. The cold water in the boiler can then be safely let go onto the grass. Opening at least one tap will speed this up. It is only fresh water so any that does run out onto the road is perfectly OK in my opinion. As others have said, remember to close the drain valve after the boiler is empty or before you try filling it again .