Non return valve in pressure line

[janvh001]

Hi
would a small non return valve (air) restrict the flow of the Doser 2?
I would place the valve at the end of the pressure line as air gets in the line due to dripping of the output.

[Vinny]

So long as you do not have pockets of air traveling through the lines, pump accuracy is not affected.

If there is a tight seal on the tubing adapters there should be minimal air between the tip of the adapter and tube connected to it.