Gosh Stephen,
I don't think there is a 'best' van as such, it all depends on the depth of your pocket.
If you are a one man band, and are not doing very large accounts, ie, the sort of work where you are going to go through 800l or nore of water in single day.
Then you could go for something like a Peugeot Expert/Citroen Dispatch/Fiat Scudo.
You could fit up to a 650l system in one of these, they all do a model that has a 900k load
Next size up is the Vivaro/Traffic/Transit/Relay size vans. You can go for an 850l system in one of these, or larger still if you go for the LWB versions.
My own
personal opinion is that vans such as the Ford Connect/Escort/Partner size vans just aren't big enough or able to carry the load.
I'm going to need a van myself, at the moment I working out of a hatchback car.
First I am going to go for a Peugeot Expert, then it's a Vauxhall Vivaro
For me the problem is (problem
) that my work load is increasing all the time now as a result of going over to WFP, and if I go for, say, a Peugeot Expert, I don't want to find 2 or 3 years down the road that I really should have gone for a Vivaro
So in your purchase of a van, you do also need to be at least
reasonably sure that it is going to be big enough to cope with your work load for a few years.
Yes, I know we can all buy another van, but you will have kitted it out with the relevant sized tank and system.
Its all good fun isn't it
Ian