Quote:
|
Originally Posted by cptclever
Three main concerns:
1) what happens when the power goes off?
2) what happens when the power comes back on?
3) how noisy is it going to be?
|
1) power goes off:
your tanks will drain however much the water level is over the overflow.
ie) I had a 48 gal tank running about 800gph, so the water lever was usually 1/2" over the lip of the overflow. When the power went out, that 1/2 of water went down so about 3 gallons EXTRA would flow into the sump. Not a big deal.
2) when the power comes back on, the water is pushed into the tank, it flows up and over the lip of the overflow, the overflow sends it back down to the sump given the syphon was not lost. if air got into the overflow and broke the syphon, I have a rio rvt hooked to the top of the airflow that sucks the air out and re-makes the syphon, then it drains normally. if there is air in the overflow it gets sucked out before there's enough water pumped into the tank to have it flow over the sides.
3) depends on how loud your pump is (i'm ungodly lucky and have the noisiest mag drive there is) and depending on the design of your overflow you might get zero noise from it, or a little trickle, or a loud splashing sucking noise.
my cpr running at full capacity was near silent.