Vacuum/gas manifold with a Firestone rapid purge valve at one end and 0 to 5mm high-vacuum, easy action PTFE stopcock ports with 3/8 in. O.D. Swagelok® tubing connections. Each connection also has an O-ring groove (O-rings supplied) for use with #11 Ace-Thred.
The Firestone valve eliminates the need for a second tube. Simply connect one 10mm O.D. arm to vacuum, other to gas source, and, by a half-turn of the stopcock plug, alternate between vacuum and gas. Shut-off float on gas side of valve prevents pressure build-up when system is purged. Plugs are PTFE with UHDPE handles and PTFE O-rings.