Precisely what is big difference in two way manifold valve & gauge valve? I dunno why my basic manager mentioned that use gauge valve instead of two way manifold valve in tension gauge. plz demonstrate why.. Kp-lok gauge valves are put in in the piping to operate as shut-off valves http://sergioeottc.acidblog.net/18234264/gauge-valve-things-to-know-before-you-buy