Which of the precautions listed should be taken when gagging a boiler safety valve?

Correct Answer: Option A — Tighten the gag only finger tight to prevent damage to the valve stem, disc or seat.

Safety valve gags must be tightened only finger tight against the valve spindle to prevent distorting the valve stem, disc, or seat. Over-tightening with wrenches can permanently deform internal seating surfaces, causing subsequent steam leakage and failing pop test pressure settings.