Hello Richard, spoke to you on Friday out Varitech, like your set up, looks smart. I've installed everything myself in the back of my transporter as I've changed my van enough times to do a complete refit in a day now so not short of practice.
Spent Saturday installing an ionics 600 tank, DI vessels, two pumps, two flow controllers, hose-reel, pole holders, two battery trays and batteries, insulated tank completely and inside of van ready for winter. Just got to install four 40watt solar panels, a regulator, an inverter and then I'm off the grid permanently for recharging main battery and secondary battery throughout the winter as they will remain permanently trickle charged and also connected to a smart split charger running off the van battery.
I have a 650 litre stainless steel frame and tank as well as filters, filter housings and possibly a 4040 R/O set up which I've taken out for sale if anyone is interested. Text sensible offers to: Wayne 07511 700754 (location 5mins from Varitech in Newton Abbot)