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Just reading up on miscellaneous stuff and was reminded of the fact that SH when breaking down the chlorine off-gasses which brought up this question, if storing 12/15% in large volume should I/we vent the storage tanks?

Would a large volume tank filled to the top and tightly sealed be a potential "bomb" risk?  I wouldn't fill a tank up cold if the temp is going to go up raising pressure that would be problematic when opening (increased pressure) spraying SH on you!

1. "Stagnation of flow or system isolation has been one of the most noted operational problems with Sodium Hypochlorite systems. Why? When the system is stagnant or "not allowing gas to be circulated through the system," gas becomes trapped in the isolated system. The Hypochlorite will continue to outgas and will buildup extreme high-pressure if not allowed to vent or recirculate. Diaphragm pump ruptures, short run piping system and ball valve explosions, pump malfunction (airlocking), and gas pressure relief valves are a few sensitive issues in which to take precautionary measures. Generally, if a system is left stagnant for long periods, the system should be drained, flushed, or allowed to be bypassed through a recirculation line. "

Source:  http://www.panner.com/tech_articles/lind.htm