What is the purpose of the 'y' elbow on the first tank? Is that left open or sealed when completed? If left open, won't it stink?
Md Ariful Islam
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,
এমবিএ(মার্কেটিং)
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Dr. Md Rushad Rahman
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পিজিটি(মেডিসিন)
That's your clean out, it takes a threaded cap or plug.
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