[Smudger]

It also says its Heavy duty !
thats barely a commercial grade - make of that as you will

TBH @ 12 LPM you just need a mains tap - no need to pretend to be a pro with that low flow

Darran

[zesty]

Just looking at the description here https://kiamproducts.co.uk/pressure-washer/petrol-pressure-washer/kiam-warrior-3000p-petrol-high-pressure-washer-jet-cleaner-6-5hp-engine.html

It says 'This unit comes complete with a 3m water suction hose & water suction filter and is designed to suck from a water butt or water tank, and can also be connected direct to the mains.'

Highlighted the bit in bold.

Unfortunately that machine just isn’t really suited to drawing water, you really need 21lpm 13-14hp machine to make use of a buffer tank...