Water into tank under bed

How about a couple of watering cans instead of aqua roll?

When I posted that I did actually think about a couple of cans of no other options I’ll do that 

thanks jvb66

Could be filled with a hose pipe and topped up with a watering can?

Nit sure how you'd get on using a hose pipe of club site  unless yiu have a service pitch. Too heavy to tow filling it before 😱.

I believe you can get a pump that would pump it in from the aquarol ??

Bakers2 I was wondering if I could get a pump 

Without knowing exactly how your water system works, it's difficult to advise precisely as to the best way to overcome your problem - but in principle, there is no reason why your existing aquaroll pump shouldn't be able to fill the on-board tank via a diverter valve.  Our previous Bailey had this system - but it is essential that the on-board tank has an overflow pipe (through the floor) - so that you know when to switch the valve back without flooding the caravan!

Our present Knaus has a different system in that all of our water comes from the inboard tank and therefore it has its own pump to supply water around the van. It's filled by the aquaroll pump which is controlled by a float switch in the inboard tank.  So that tank is always full as long as there is water in the aquaroll.  It would be quite an easy DIY job to install such a system in your van. 

for sale on ebay ;- search for - "Caravan toilet flush tank filler pump"

just need somewhere to connect 12v supply, looks like cigarette lighter type plug

I use a 12 volt submersible pump to fill my tank from an Aquaroll. However, this makes use of a 12 volt socket next to the filler cap on the side of my van. I gather you are a caravanner, but with an on board tank; so presumably no 12 volt socket?  

Maybe you could fit one - that is beyond my pay grade, but I am betting there are people who will tell you it is not difficult!  

My old van did not have a 12 volt socket so I used to use a 10 litre watering can to keep my tank topped up having firstly filled it at the motorhome service point. For you I think maybe the watering can is the better option (although I am a bit hazy as to why you would need two unless you are just trying to reduce the number of trips to a tap)! 

[Edit written before seeing last post above. Maybe that's your answer if you can plug into cigarette lighter (though you might need a long lead)]

The caravan is a Cristal moorea from overseas 

it has a similar tank beneath the bed that is pumped to shower and sink 

an£ 8 think the water unit to heat is is called a trauma 

Truma presumably though Trauma may not be wholly inappropriate!   

I bought a cheap caravan submersible pump and wired it to a 12v cigarette lighter plug and a long enough bit of hose to reach from an Aquaroll to the filler hole of our motorhome water tank - just  plug in and transfer the water.

Have only needed it when we have been at festivals and using  the shower in the MH - tank only lasts a couple of days then!