How do I configure a helium recovery system that won't perturb my magnet's stability?

I'm concerned that just hooking up a hose that connects the helium exhaust of all our magnets to a community recovery system shared with EPR and Physics labs is going to lead to pressure fluctuations that will compromise our magnets' stability, specifically its lineshape stability.

I know we should have one-way valves in place, but well before I arrived our engineer removed the Bruker one-way valve from the magnet and instead placed a more industrial-looking one-way valve at the manifold on the wall.

My main question is whether we need to purchase a manostat to enhance stability. They cost ~$10K, which isn't a trivial chunk of our maintenance budget.

I'm open to any suggestions.

Thanks.