Thanks for pointing me there.
I dont need screw on connections as it is all push to fit hosing.
Whats the difference between compensated and non compensated?
There are some non compensated on RS for less cost.
Where port 1 is left to atmosphere just as you suggest that I leave one connection off to atmosphere on the device you pointed me to. Is it just that these non compensated devices dont have a port to connect a hose to another pressure source and just have a "hole" left to atmosphere?
Thanks
Gordon