The guide I believe was translated from Chinese to English is poorly done with no editing or proofreading. If you have common sense and some experience, you can do it. I've found that flapper valve servers are also a one-way valve. both connections are at the top, I would like a drain fitting at the bottom to remove limescale in the future. Heats water quickly. Hot water runs out quickly. Maybe 30 seconds. I think if I change the temperature on the faucet it will take long enough for the house heating to reach. I think if it fails in the future I might go for a more expensive unit, it was the cheapest I found and you get what you pay for. The average temperature setting is about what you want.
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