1) We flipped the top bucket so that it rests inside the lower one, to better ensure the gas is sealed inside the biodigester and won't escape.
2) We designed the two buckets to be taken apart easily, but they fit together securely enough to not separated unintentionally. This allows the top bucket to rise when fill with methane gas, giving a visual indicator when methane is ready to be released. Also, it allows us to easily empty out and clean the bottom after most of the water has been drained.
3) We also changed the faucet we were using for gas to one which will fit with a propane connection. both faucets are reinforced with extra caulking, as the design is dependent on there being no water or gas leaks.
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