Varistream and ecoflows work different ways, and cannot be compared!
Why not ring or go to...
http://www.williamsonpumps.co.uk/A very nice man told me this...
Ecoflow
retard the pump (shurflo 100psi, in my case!)
couple this with a 100m microbore hose... disaster
Why?
Back-pressure on hose for one
Retarding a 100psi pump, puts presure on the "Pressure switch" which will normally burn out in less than a year!
Varistream
Works on demand (does not retard the pump)
pressure switch is bypassed (but not removed)!
I have had both now and I believe the varistream to be superior in design!
Before you ask, Why?
To have a pump that can deliver a psi of 100 and then retard it, seems ludicrous to me
Back pressure on hoses is a killer on pressure switch's.
I chose 50m of 8mm microbore hose instead)