Return pump adjustments

[henjon]

Hi..

I currently have a rather weak pump as a return pump.. By reading the diagram i can tell that at the current lifting height, the pump will give around 78 gph, which is acceptable (a litte under what i want) for this tank which i will catagorize as a nanotank.

The problem is that this pump is working near its maximum limits, and so it is very noisy.. Yesterday i tried to replace it with a 600 gph pump, but went alle wrong..

The pump simply emtied the return chamber before the overflow could drain the water back to the sump and to the return chamber..

Now i have been thinking about what to do... Would it work if i add a valve on the returnpipe and thereby adjust how much water is pumped back into the tank?? Or would it either not work or cause the pump to break down or become just as noisy as the one i have now?? I mean, the pumpe doesent slow down just because i add a valve... or?

[Blown 346]

The valve will most definitly work, You dont want to have to cut the pump back alot. By doing so you can get noise and shorten the life of the pump and build up more heat than normal.

Would it be possible to get a overflow that flows more?

[henjon]

I plan to add a T junction after the outlet of the pump.. then i will add a valve on the T outlet into the sump.. this way i can control how much runs back into the sum and how much runs into the display tank. Does this sound logically?

[rreddick]

Should work, you can throttle back a magnet drive pump with out damage, a direct drive pump will burn out though. A tee on the return line, with the 2 gate valves, one on the sump return line, and one after the tee to the tank would be best, gives you very good control on water flow to the tank and sump. if you only do one valve after the tee water takes the path of least resistance and the majorty will go to the sump.

Ron

[Sea-nut]

I use only one valve on the sump return and it works just fine.