Are there additional vent stack design recommendations for cold weather climates for the potential for freezing rain or snow accumulation and blockage for designs such as CGA G-5.5 Figure 7, which includes drains for liquid water but does not account for snow or freezing rain?

CGA G-5.5 provides several options for vent stack outlets but not all options, nor does it tell when one outlet type is better than another design.

Figure 7, is one design, but in my opinion, not the best design. For instance, for warm gas, typical no-flow, normal scenarios (like a rupture disc on a vent system), Figure 5, a capped vent pipe is the simplest.

My preference depending on the application is a design not included yet in CGA G-5.5 or Figures 6 or 8 depending on if the flow must exit vertically or not.

Water, snow, or ice mustn’t plug the vent system, which may occur with Figure 7 if the weep holes become blocked.