Letter Re: Advice on Caching Containers
Hi Jim, Military shipping containers make great storage, but your readers should be aware that the large plastic cases are not necessarily waterproof if they have a pressure relief valve. Most of them have this due to the need for pressure equalization, e.g. atmospheric changes during aircraft transport. If you are going to bury such a case or use it in a wet environment, the small round valve can allow water to enter the case. Some of them are good at keeping water out for a short time, but if something is going to be stored for possibly years, anything …