Low Flow on 1073.02

[RedJag]

Hi Roger,

I recently purchased a 1073.02 Silence pump to use as a return pump on a 50 gallon cube. The head height is just under 4 feet. I marked the water height in my sump, added one gallon of water and remarked the new height. I then timed how long it took to pump out the 1 gallon of water. Please note the return water wasn't going back into the sump. It took about 63 seconds. I then changed the adjustable gph setting on the pumps dial to the other extreme and timed that. Again, it was about 63 seconds. This gives me less than 200 gph flow thru the sump. Perhaps that is enough. But I am questioning why the flow is so slow. And why the flow is the same at both extremes of the adjustment dial.

I checked the manual and it mentions a flow control on the small box on the cord that attaches to the transformer. There is, however, no knob or switch on this small box, only what appears to be a receptacle for a plug.

Am I missing something?

Gary

 

[rvitko]

By the flow chart the pump should be doing 264 gph at this head pressure so what you find is roughly in agreement with the published data if we had a 90 elbow which would make the head pressure closer to 5ft where it would be 198 gph. I suspect there is an additional restriction and elbows always are to be counted as an additional foot of pressure.

My guess is that the knob is not turning instead the entire locking cover is turning, I would check this, if you remove the front cover you can see the knob and locking ring and the knob when turned should turn and restrict the intake.

The manual covers a few models, model 1073.050 is the model with the electronic flow adjustment you mention.

 

[RedJag]

CORRECTION!!!!!!!!!!!!!!

Roger, the time to pump 1 gallon was 33 seconds, not 63. That gives me slightly less than 120 gallons per hour.

Sorry for the error. A lot on my mind lately. Sometimes life gets in the way!!

I will check the cover and knob and see if I think it is functioning properly.

Gary