I was wondering if anyone had any ideas, or if this is just one of those things you have to live with...
I have a March 815 on my BIAB stand, located about a foot below my kettle. I use the pump to circulate wort through my plate chiller. About 15 min before flame-out, I start the pump to circulate (near boiling) wort through the chiller to sanitize it.
I have a quarter-turn ball valve on the outflow of the pump. I have to keep it throttled down VERY low, otherwise I head a loud "screech" from the pumphead and it stops pumping entirely. When it stops like that, I have to cut power to the pump completely, and when the motor stops I hear a subtle "thunk" as the magnetic impeller re-engages; then I can restart the motor and resume pumping (excruciatingly slowly).
It seems like, after flame-out, when I have water running through the chiller & the wort is actively cooling, I can run the pump wider and wider without this "vapor-lock" (if thats indeed what it is).
Is this normal? Does everyone else experience the same?
FWIW, there is a _slight_ flow restriction in the kettle in that I have a pickup tube mounted inside my spigot - it is not very narrow, though... but it does seem that I can never get all the air out of the hose leading from the kettle down to the pump, and I cant help but wonder if thats not part of it?
I have a March 815 on my BIAB stand, located about a foot below my kettle. I use the pump to circulate wort through my plate chiller. About 15 min before flame-out, I start the pump to circulate (near boiling) wort through the chiller to sanitize it.
I have a quarter-turn ball valve on the outflow of the pump. I have to keep it throttled down VERY low, otherwise I head a loud "screech" from the pumphead and it stops pumping entirely. When it stops like that, I have to cut power to the pump completely, and when the motor stops I hear a subtle "thunk" as the magnetic impeller re-engages; then I can restart the motor and resume pumping (excruciatingly slowly).
It seems like, after flame-out, when I have water running through the chiller & the wort is actively cooling, I can run the pump wider and wider without this "vapor-lock" (if thats indeed what it is).
Is this normal? Does everyone else experience the same?
FWIW, there is a _slight_ flow restriction in the kettle in that I have a pickup tube mounted inside my spigot - it is not very narrow, though... but it does seem that I can never get all the air out of the hose leading from the kettle down to the pump, and I cant help but wonder if thats not part of it?
