Thank you for writing. I am not a big fan of bypasses either. That is where we have trouble when valves fail closed but look open, leaks, valves in the wrong position. If you need to ever bypass the heater something really bad happened. That is extremely rare. Even if the heat pump was leaking so badly that you would have to shut down the system, it would take 5 minutes to glue your temporary bypass; a pipe and two elbows after cutting the heat pump out of the system. I hope that helps.
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