Well we agree on something Nevil
50ft is the most I'd ever go on a twin motor in-series configuration like the Ninja.
Guys, if you can't notice any difference in performance at the wand between 25ft and 100ft on an in-series machine running 1.5" hose..... wow ....
I cleaned with Ninjas for years before upgrading, and still use one for the odd job now and again. I could always notice a marked improvement in vacuum when dropping back from 50 to 25. On the very odd occasions I had to go up to 75ft it was an utter nightmare. It was like running the machine on 50ft with only one vac motor working.
So I don't know where Mr Ashby gets the idea that a Ninja could operate anywhere past 50ft, let alone the distances he states! Even their booster is completely idiotic, adding more lift to a system that already has plenty of lift but desperately needs airflow. Nigel's booster mod (that used the 3rd vac to create a parallel system) looked really good, I'd have loved to have a little play with that.
Nevil, I remember the debate you and Robin are referring to.... I think if I recall correctly, you had been using 2" hose on a machine configured in-parallel? I think we might have concluded that that was the difference in why it worked
I have tried 2" hose on my Ninja a few times and I stand by what I say - it hasn't got the oomph to evacuate the recovered liquid from the hose back to the machine. Doesn't mean it doesn't work, but it's just a pain in the ass lifting the pipe up in the air and tipping the water back to the machine, after you've cleaned every 10 sqm or so. If you don't do that, when you put the wand down or disconnect it and lay the hose on the floor, all your hard work will promptly re-appear and come flooding out all over the carpet again!!!
Another important thing to consider (and I probably mentioned this before, but who can be ar*ed to go find the topic again?
) ..... 2" vac hose has approximately twice the internal volume of 1.5". As we all know, the motors have to expel air from the system in order to create a vacuum and therefore move air. The internal volume of 50ft of 2" hose is larger than the internal volume of the machine's waste tank!!! Therefore there's a massive delay between putting the wand on the carpet and attaining optimum lift.
With an in-series configuration, the negatives of the 2" hose far outweighs the tiny advantage in airflow, because the in-series config aims to work using lift rather than airflow, it's a bit like putting alloy wheels on a Reliant Robin, totally pointless
Dammit I wasn't going to reply to this but I took the bait
