Hi Edward,
grippa tank are.. Brilliant, i have been using them for around 4 years now for everything.
items from Oliver and team have been 2x 500 litre delivery systems with split relays and hose reels including the protective floor coating. I find all the equipment sold by them to be top quality and never have a problem with anything. The installations are always on point and both my vans look identical even though they were installed with two years apart which to me shows that they have a system for installs and stick to it.
I also rate the customer after care/support as 5*
A few other "premium" water fed pole providers/installers could take a leaf out of these guys book.
Paul