Check the pump strainer to see if it is clogged. Also make sure no resin is seeping into your product water. I have had both things happen to me but not show up on the tds reading.

Will do that, the water filtering is in a separate  tank at home rather than in the van.

12lpm with a booster pump that’s what you are  legally allowed to draw from domestic supply - I do not think those rules have changed.  From 720 lph max achievable would be half of that 360 lph realistically this drops to around 40percent at around 288 lph  at the high end . If no booster pump this will result between 90-120lph production subject to your pressure  and temperature of water. At 220 ppm you can achieve  4 -6 ppm water with no resin -  change required it is  to know when to rinse more ie dry windy days . Two choices 4040 hf4 boosted or hf 5 non boosted. In my personal experience with 325-375 ppm hf 4 gives me best results with longevity and performance - 2 years and still between 5-8ppm before resin. Hf 5 lasted only 18 months before going above 16ppm from 10.  If you choose boosted system look for one with flow and waste metres to adjust accordingly. Gate valves tend to fail prematurely in hard water supply. Needle valves offer better adjustment - can’t comment on longevity yet.

HILKA PRO-CRAFT 400 KG FIXED LOADING RAMPS 1 PAIR (308RA)
Around £50-60.
These are rigid. I load my honda 390 no probs.
They do a folding one as well but not sure on strength.

I think I got mine from screwfix.

Hi all sorted my workmate altered the settings don’t know how but sorted thanks andy