I have just been on the phone to Vyair and am finding there pumps are not lasting 4 months due to the armature burning out this then heats up the brush holder inside the pump which over heats the wiring coming out of the pump . If you are considering changing to this pumps be forewarned. I have had 3 pumps in the last 10 months ||I am thinking of connecting two 5 liter pumps of another brand to get the flow rate which is fantastic to work with. Its just not worth it.
I have a two man system so my pumps do not work hard at all. I know there were others having the same problem as I have . AS a matter of fact my 7 liter back up pump has gone a.w.a.l a week back. If they do not do something to improve last ability I for one will look elsewhere , i CANNOT HAVE ALL THESE DAYS LOST TO REPAIRERS.