Originally Posted by Robert56

The best place is at the noid. The reson being, any particulate after your filter wiil still get to the noid. Lines can have debri that can loosen up and get in noid at anytime, also everytime you disconnect and reconnect a fitting you are potenialy leaving a small metal burr behind, especially with aluiminum fittings. However, i do understand the reasoning for wanting the filter at bottle area. My suggestion would be to also run a screen filtered fitting at the noid for ultimate protection, I do.
Robert

Originally Posted by Nitro Dave's Nitrous Outlet

All NX solenoids have a screen filter made in. So I alwasy put the filter back at the bottle.
Dave