2019 Tech Report Jan-Feb

This all makes very interesting reading but, how do I apply what it says?

extended larger-diameter stack draws to the internal surface and drops down and drains out drain hole(s) at the bottom. This keeps the rain and snow fromgetting into the relief termination piping that is on center internally.

Let’s look at some examples that do not meet the standard. These examples were discovered during a mechanical inspection. Do you have any of these problems?

Uncceptable installations

2. Here we have a discharge termination that is NOT more than 20 feet from a higher roof, it is not 7.25 feet above the adjacent higher roof, and is not directed upward and arranged to avoid spraying ammonia on persons in the vicinity. This looks like a good place to take an ammonia shower.

1. What’s wrong here? Pipe plugs in the outlet of the relief valve. These are not waterproof and contribute to corrosion of the relief valve by trapping moisture in the relief. Also note the relief termination is NOT 7.25 feet above the adjacent higher roof.

3. Here we have a common condenser relief installation. If the top rail of the guard rail is about 42 inches, a maintenance man would be looking into the discharge of the relief. This is an accident waiting to happen!

4. Here we have the same problems as before with the addition of being within 20 feet of a window or a door.

RETA TECHNICAL REPORT PAGE 2