Every so often the return makes a sucking noise. There is a little whirlpool at the time this happens. Is this normal? Pressure is always the same never goes up and never comes down.
Thanks for your input!
Every so often the return makes a sucking noise. There is a little whirlpool at the time this happens. Is this normal? Pressure is always the same never goes up and never comes down.
Thanks for your input!
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