Had my van for a few months now but still not cracked the water filling issue properly.
Because I am lucky and it has loads of lockers and storage space under the floor and a big payload I am considering a fitted hose system on a garden reel with a swivel connector that is permanently plumbed into the water tank filler pipe and mounted in a locker so that all that is required to fill up is to unwind the hose and connect to the tap. At the end, the hose winds back on to the reel and job done.
The only problem I can see at the moment is stagnant water remaining trapped in the hose but i think most of it would drain out as the hose was wound up. Would this be an issue?
Frankia vans come as standard (and various others I suspect) with the system you describe, we have not noticed any problem but we do use the van a lot year round so only two or three days pass between fills, Alan.
Flat hoses are a pain to be honest. I have 3 hoses in my van now. A very short normal hose. A medium length slinky style and a long flat food grade hose. I always position the van in such a way that I don't have to unwind the full length flat hose >.<
I am fulltiming so little inconveniences like flat hoses do come up a lot more often
The short hose is about 5 meters long and is used on 90% of cases and is so easy. It generally doesn't even touch the ground so no grit/dirt to clean off before putting back in locker.
Most water tanks have a large opening on the top mine being typical, if you undo the large cover plate and empty out the water the opening is big enough to insert a small ballcock, drill out a 15 mm hole in the side of the tank and insert the ballcock, tighten up the back nut, from there you can take a 15 mm feed through the side of the motorhome by way of a box or a cover plate and fit a straight one way valve this will allow water in but not out set the ballcock to the desired height you will not require too much water in the tank as it will be controlled by the ballcock via mains pressure.
I would suggest that the level be set at least 2 inches below your current filler pipe this will also allow you to fill up manually with a watering can or like wise if required.
If you now connect your hose to the one way valve you will have achieved a permanent mains supply job done
The type of side entry ballcock that i was referring to can be purchased in most caravan shops it is referred to as a mains kit for an aqua roll or water hog instead of having a ball it has a cup and is easy to adjust the arm is approx 1 and a half inches long, you can also find them in plumbers merchants.
As to the overflow your normal filler will act as an overflow provided that you remove the filler cap, the top entry cap is water tight the one way valve in the side box is of a bayonet type the other end of the bayonet is connected to your hose,if you don't want to cut a hole in the side take it through the floor and mount it underneath and accessible.
Just make sure the one way valve is fitted the right way round, good valves will have an arrow indicating the flow, if there is no mains water on site ie near the van you can still fill it up through the filler without any trouble.
during a recent visit to France we stopped at a motorhome accessory shop and purchased a 15 meter food grade flat hose on reel , so what you may think! well , you only unwind the length required ie 3, 5, 10 or the full 15 meters
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