[heath verrall]

filters & the RO would this give me more presure?? what I have now is normal size hose to the pre filters then the RO, if I was to change to a smaller size this should bring more presure to the RO.

or am I mad to think of such a thing

yours ccmids

[DG Cleaning]

If you did that you would lose flow and the pressure would
stay the same

[Spruce]

If you did that you would lose flow and the pressure would
stay the same

This is true although if the size of the hose is too small and doesn't keep up with the through-put of the r/o then the pressure will also drop as the hose becomes a restriction. If you shut the water off, then the pressure will be virtually the same at both ends.

Perhaps the best example is putting a garden sprinkler on the end of your minibore/microbore hose and connecting it to the garden tap. There isn't enough flow and pressure at the sprinkler to water the garden.