Restricting the output of a pump

theplatypus · 06-10-2006, 08:34 PM

Is there any harm in restricting the output of a Mag7? I was thinking of putting a ball valve on the return line from sump -> tank.

zxcv123 · 06-10-2006, 08:40 PM

any pump can be restricted, but dont restrict it to much or else the pump will have to work harder, and may have a shorter life. I am plumping challanged so I dont know what a ball valve is .

tims · 06-10-2006, 08:40 PM

i dont belive it will harm it

zxcv123 · 06-10-2006, 08:41 PM

since im assuming tims knows what a ball valve is, i agree with him.

motorslave · 06-10-2006, 09:25 PM

No harm! Just dont do it on the intake side! I believe that for some pumps, a little restriction is a good thing.

Robert

hng · 06-10-2006, 09:57 PM

I would think that restricting the output would shorten the lifespan of the pump and cause more heat output. I could be wrong though, cause I've never done it, but it seems like that would make sense

fchidsey · 06-10-2006, 10:35 PM

If you look at the mag Charts for the out put of the device you will notice a head pressure chart the higher you have to pump the water the lower the ghp of the pump. A ball valve is noting more than a lot of head pressure on a pump. as previously stated do not put it on the intake side of pump.

I run two on my mag 12 on the pump tee's then a ball valve to the return and another to the chiller and UV.

Remember to open and close them once per week or they will freeze up from the salt and you will have problems. the return to my tank will not close all the way because I did not do this.

motorslave · 06-10-2006, 11:03 PM

Quote:

Originally Posted by hng

I would think that restricting the output would shorten the lifespan of the pump and cause more heat output. I could be wrong though, cause I've never done it, but it seems like that would make sense

Youre partly correct! If you restrict the pump on the intake, that is when you are making the pump work to hard and it will have a shorter life. Restricting the output is just as stated above, mechanically adding head pressure.

Robert