basin mixer - is 3.5L per minute OK?

[Dave2759]

IN our bathroom refurb, we like a basin mixer that has a quoted flow rate of 3.5L per minute at 0.2 bar. We have a gravity system that has approx 2.5meters between the bottom of the cold tank and the sink. Question - is 3.5L per minute usable or is it too low? Could it be improved? Will say hot water alone be even lower flow?
Thanks

 

[terryplumb]

It's quite low, enough to wash hands though . Is the cold from the loft tank too ,or is it mains fed ?

 

[Dave2759]

cold from loft tank

 

[Dave2759]

I guess those who have high pressure systems have to limit the flow in some way. The mixer we like will do 12.5L/min at 2 bar but wouldn't that splash everywhere in a basin? What is a good usable flow?