The more jets there are, the closer thay can be to the carpet.
The closer the jets to the carpet, so the lower the height of the tool (great for working under low furnishings).
The closer they are to the carpet, the less distance the pressurised water has to travel.
The less distance the water has to travel, the less energy there is lost.
The less energy lost, the greater the impact and shearing properties of the water on the soil.
The less distance the water has to travel, the less is the heat loss.
There will always be advantages and disadvantages with all configurations of wands.
Safe and happy cleaning
Ken
Thank you Ken!
I was about to pop a blood vessel with the mis-information being posted.
I won't even address the cold water stuff, heat is always better.
And who was it that said that roto-wash FloodJet was 2" off the carpet, looks more like 4 or 5" to me. With a standard 128º spray angle that might work....at 40 psi.
I notice nobody mnetioned that these "worn out" single jet wands are probably putting out twice teh volume of water as when new...twice the water can mean a better clean...especially if compared to a 4 jet with very small jets in the first place.
Show me a high flow wand with steeply angled jets 1" off the carpet and 500 psi and I'll show you a cleaning and drying demon....of course it will have a glide.
I can't beleive we're having this discussion, over on Truckmounters this was covered ages ago.