Which Return Pump for basement sump?

[daplatapus]

Yup, agreed. The Waveline can be either in-line or submersible, and if I'm not mistaken, can be speed controlled by an Apex or similar controller. Not sure how much or if any tweeking is necessary, but I've heard it can be done.

Just an FYI here's the flow chart for the DC 10000. You're going to be getting 1500-1700 gph or so if I extrapolated that properly. I'd probably reduce that by another 10-15% depending on piping and what not.
http://www.rlss.ca/#!dc-pump/vstc3=dc10000

[reefermadness]

seems like the waveline handles pressure pretty good. The bubble blaster not so much.

thank for the correction on that one.

[sphelps]

I run two Waveline 10000s, both mine leaked slightly when I had them external so I've moved them internally. Seem like decent pumps so far but I'm not convinced on the flow rate, I have two running in parallel with minimal head pressure and it just doesn't seem like as much as you might expect considering they are rated at 2600gph each, still working on a way to measure what I'm getting cause I am curious.

Also there is no advanced controller yet AFAIK, the development of one has just been mentioned in some reviews. They are pretty quite, no real vibration just a bit of a motor hum. They ramp up slowly when turned on and the controller remembers your setting if shut off, both very nice features.

[lastlight]

Originally Posted by sphelps

still working on a way to measure what I'm getting cause I am curious.

I think GHL came out with sensors but if I'm remembering right they only went to 2000gph.

[sphelps]

Originally Posted by lastlight

I think GHL came out with sensors but if I'm remembering right they only went to 2000gph.

Yeah not much good for me really. Typically you can get good estimate on the flow rate buy timing how long it takes your sump to catch up after a shut down provided you know the volume of back flow but these pumps ramp up slowly. Another option is to drain your overflow and then shut your drain valves timing how long it take to full the overflow box but my pumps are in my overflow box so that doesn't work for me either.

I was looking at that pump curve previously posted, it really makes no sense to me. The slope shouldn't increase with more head pressure and it's apparently only capable of 5m of head yet the chart suggest it still do more than half it's rated flow rate at it's max head pressure. Maybe it's not showing up right on my browser, this is what I see


This is what a typical pump curve looks like

[reefermadness]

Yes....it is strange that at the max head height it is still doing over half the flow??? I thought the same thing.

[sphelps]

Must be a mistake in the graph, if you draw a line from 5m and 0l/h to the point in the line where the slope changes you'll probably get closer to the right answer.

This is probably closer to reality

[Carandiru]

Well that knocks it down to 2 pumps. Blowhole will save a little cash and I was planning on drilling the 55 gallon Im using for a sump and the 90 gallon display tank upstairs (currently in use - I know I've got brass balls).

I've seen some reviews of the blowhole saying it's a great pump - some of the early prototypes having a problem with heat though. That is apparently corrected with the final release model.

The Waveline is a really nice pressure rated pump, but more than I wanted to spend honestly - to bad the 5000 model wasn't enough only max 10ft of head.

I'll probably go with the Blowhole. What would you do?

[chatyak]

Originally Posted by sphelps

I run two Waveline 10000s, both mine leaked slightly when I had them external so I've moved them internally. Seem like decent pumps so far but I'm not convinced on the flow rate, I have two running in parallel with minimal head pressure and it just doesn't seem like as much as you might expect considering they are rated at 2600gph each, still working on a way to measure what I'm getting cause I am curious.

Also there is no advanced controller yet AFAIK, the development of one has just been mentioned in some reviews. They are pretty quite, no real vibration just a bit of a motor hum. They ramp up slowly when turned on and the controller remembers your setting if shut off, both very nice features.

I heard the leak is caused by using the wrong o-ring or seal. Apparently a different "orange" one is needed from RLSS if being used externally. It's not included for some reason..

[Aqua-Digital]

I am running a waterblaster 7000 @ 11ft head from the basement and it is kicking out about 150gph.

Time will tell on its longevity.