I've got a setup with this adapter-

ISoda Beverage Seltzer water External Large CO2 CGA-320 Tank System Adapter And Hose stainless steel 60 inches long. https://www.amazon.com/dp/B0721W5Y91/ref=cm_sw_r_cp_api_i_wa2vFb4PE7381

Coming off a 10lb tank I'd picked up at Airgas (exchanged a new empty tank for a food-grade). Initially we thought there might be a slight taste but after dozens of refilled bottles we don't notice anything off.

Fwiw I empty the line at the end of each refill session.