There is a lot of rubbish talked on this subject, most of it is emotionally driven. First of all and above all else the important thing for anyone to remember no matter what insurance you have or what securing methods, whether tested or not, is that you have a water tank in the back, water is loose/flexible /fluid and as such can generate large pressures/surges if you have to stop quick!! Its doesn't matter if you are insured to the hilt and have a fully crash tested system, you should still remember what you are carrying and drive with care. If anyone thinks they can drive their WFP van as they drive their car because they are well insured and crash tested then more fool them! That said........
I've insured several vans for window cleaning, some ask about the tank, some don't. The ones that have asked about a tank have not asked for any crash testing certs. If they asked me for a cert and i couldn't provide one then i would take out the frame and secure it with webbing strapping so its not a 'mod' .Whatever van you have will have manufacturers data for the van loading/restraining points and it should be within their criteria.
I would personally refuse to deal with an insurance company that wanted tank certs as their is no national/EU regs that cover the fitting of tanks so its at their own bequest you furnish them with such details. And , to be honest such details are just a quango driven requirement from the likes of <certain known WFP system manufacturers> and Thatcham Research ( a private profit making company).
who also liase with insurance companies.
I also got an email today, same as many of you will of done...........
from H20 systems or someone like that waffling on about crash tested systems.
So...if its too expensive or you can't provide a cert then get it strapped down good with appropriate rated webbing/ratchet straps, rely on the manufacturers tolerances for securing points. Or alternativley tell them to get stuffed with their crash testing certs request. Fitting only involves spreader plates or bars and does not include going into a chassis for securing. If it included going into a chassis for securing them they'd have to do one for each model they did.
The best insurance is to drive like your tank might kill you if it came adrift ad also you want the cheapest one !!!