ball valve/drainage help.... quick question

peckhead

peckhead

Active Member
which is better...
having the ball valve turned so it slows teh flow of the pump?
or having it open and listening to a loud overflow..?
i have a mag 9.5 pump on a 90g with a 400gph overflow. when i turn the ball valve so it is like half way off the over flow is perfectly quiet. when i have it more open i get great flow but it is pretty loud and i get a gurlging draining noise because i guess the pump is pumping more then the overflow can handle...
so will slowing the flow of this pump via ball valve kill the pump?
what should i do?
 
grubsnaek

grubsnaek

Active Member
im with you here peckhead. i have a overflow boxed rated at 1200gph and a Mag12 (1200gph) as a return pump. i am using 1" pvc for return pipeing and i have my Mag12 throttled almost all the way back. i have a couple of threads out asking it and i am still trying to battle through it. i am going to subscribe to your thread to see if it can help both of us. hope everything goes well.
 
tree

tree

Member
slowing the pump with the ball valve will put more strain on your pump, but it will likely not kill it.
Do you have a durso or stockman standpipe on your overflow? If not that might help with the noise for when you have the ball valve opened up.
 
kainex

kainex

Member
throtteling back a pump on the return side will not hurt it
its the intake side that should never be used with a ball valve. that would damage the pump over time
 
kainex

kainex

Member
ohh. to awnser you question. you do not want to block the return at all...always run at full. use this valve only for maint. you want to do all your flow control on the pump side of your system...not the return side.......thats how floods happen
 
peckhead

peckhead

Active Member
so in the middle of my return line i have a ball valve. i have it turned 1/4 of the way to slow the flow a little and my tank is pretty silent. with the ball valve open all the way it is terribly loud because the pump is pumping so fast.
i dont understand if having it set up with the ball valve turned a little to stop flow is going to cause a flood, broken pump, or be ok. can anyone clarify?
 
grubsnaek

grubsnaek

Active Member
i dont think it should hurt it on the return side. yours is only turned 1/4 back. mine is about 4/5 turned back. i was told the same thing that it shouldnt hurt it.
 
V

vicegrip

Guest
Turning your ball valve is like adding more head run. You'll be fine, but if you close it more than half flow than you are risking the pump getting hot and heating up the water also more wear on the pump.
 
V

vicegrip

Guest
Originally Posted by tree
slowing the pump with the ball valve will put more strain on your pump, but it will likely not kill it.
Do you have a durso or stockman standpipe on your overflow? If not that might help with the noise for when you have the ball valve opened up.
Good advice on the standpipes AGA also has the megaflo.
I have the megaflo, it's silent.
 
V

vicegrip

Guest
Originally Posted by grubsnaek
vicegrip
are they built in overflows or external.
Built in.
 
V

vicegrip

Guest
Originally Posted by grubsnaek
vicegrip
are they built in overflows or external.
I remember reading your thread on your external now.
Sorry I don't have any experience with external overflows.
You said slurping right. I thinking maybe it needs air vent.
 
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