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Thread: Pump for waste water system
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22-04-2019, 11:09 AM #1
Pump for waste water system
I need to upgrade the pump on my waste water system and was thinking is a fixed rate pump going to be a better option than a variable rate pump?
I am looking for something around 10000 lph flow rate.
Would the short stop start cycles be better for a sump pump a fixed rate pump or a variable speed pump?
Probably will need to add a water level switch of some kind.
As it is only going to running for short lengths of time the power consumption isn't going to be much of an issue.
At the moment the waste water empties into a tub which is about 2ft or 600mm diameter and about 12" or 300mm deep. I may be changing this to a rectangular tub if I can find the right one.
Any ideas or suggestions?
Thanks in advance
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22-04-2019, 11:17 AM #2
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freddyboy, Frimley Koi keeper Thanked / Liked this Post
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22-04-2019, 11:23 AM #3
that's a heck of a lot of water if only needed now and then, why would you want to shift 10 cubes have you a massive head height to overcome?
just use a sump pump built for the job, they are dirt cheap at screw fix.the slow pond build thread
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Frimley Koi keeper Thanked / Liked this Post
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22-04-2019, 12:44 PM #4
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22-04-2019, 01:04 PM #5
It's not the head of water it's just that with the altered waste outlet for the Eazy Pod now flowing much quicker than it was before the current 5500 lph pump can't keep up with the flow as it was just about coping before so thought going for a 10000 lph pump would be a safe upgrade.
Maybe the best way to go is a bigger tub and keep the same pump? As the Eazy Pod holds about 100? litres of water when doing a wash out as it's pump fed and the water will be up and over the height of the bottom of the overflow I was thinking a 100 litre tub would be another possible option? Or maybe bigger pump and tub as the QT filters maybe emptying into it as well later on?
The original way I had the waste going from the Eazy Pod to the tub was via a 38mm hose tail clamped into the outgoing side of the ball valve on the waste outlet then a length of 38mm flexi corrugated hose just pushed onto it and then run into the tub. The routing of the pipe was over the top of the tub then down through a hole in the side of the tub and ran round the bottom of the tub so it had a restriction from the hose tail, then another from the bend into the tub then there was about 1.5m to 2m of pipe in total. Now it just comes out of the ball valve via a 2" flexi rubber boot elbow and then diagonally down about 50cm of 2" pipe so it has a fraction of the restriction it had before. When I opened the ball valve last night it virtually half filled the tub in a few seconds so I can't see the current 5500 lph pump keeping up. But at least it should help with the flushing out of the Eazy Pod now
If I was looking at a sump pump with a float switch which one would be the one to go for or which ones should I avoid?
Also will any fit a 38mm pipe?
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22-04-2019, 01:33 PM #6
Just seen this on Amazon, any good?
https://www.amazon.co.uk/Clarke-PSV3...gateway&sr=8-8
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22-04-2019, 02:45 PM #7
Maybe this one is a better option?
https://www.amazon.co.uk/Clarke-PSV5...ateway&sr=8-10
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22-04-2019, 02:49 PM #8
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Frimley Koi keeper Thanked / Liked this Post
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22-04-2019, 03:10 PM #9
Was thinking the second one as it has a higher flow rate and think the first one may not be too much quicker than the original - may have another look as the flow rates are lpm not lph so just need to multiple by 60 to convert them
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22-04-2019, 06:23 PM #10
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Frimley Koi keeper Thanked / Liked this Post
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22-04-2019, 06:56 PM #11
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22-04-2019, 07:04 PM #12
Last edited by Mike Bass; 22-04-2019 at 07:05 PM. Reason: auto text altered model no
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Frimley Koi keeper Thanked / Liked this Post
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22-04-2019, 07:23 PM #13
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22-04-2019, 07:31 PM #14
I hope the majority of the time my solar panels compensated for the cost
sorry didn't think about the dirt, but they do a dirty water version of their pumps I believe
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Frimley Koi keeper Thanked / Liked this Post
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22-04-2019, 08:30 PM #15
Google zoeller pumps,they specialise in grey water / sewage pumps. They are bombproof too. Try this site also. https://www.sumpsandpumpsdirect.co.uk
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Frimley Koi keeper Thanked / Liked this Post
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22-04-2019, 08:47 PM #16
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22-04-2019, 09:09 PM #17
Thanks Dave.
They only appear to do 2 that are suitable and the smaller one may not keep up with the flow from the waste outlet and be able to pump up to the top of the water butt as it only had a flow rate of 7200 lph before head loss pressure and the next one up has a slightly higher flow rate but at about £155 maybe a bit OTT price wise plus it has a strange semi automatic setup that doesn't make sense to me.
Not going to rule them out just yet though.Last edited by Frimley Koi keeper; 22-04-2019 at 09:12 PM.
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22-04-2019, 09:15 PM #18
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Frimley Koi keeper Thanked / Liked this Post
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22-04-2019, 10:00 PM #19
Regarding sump pumps if it was me personally I would only go for one with an integral float switch in the future.
I've had situations where the float switch has got wedged, either causing it to run dry or for it to not run at all, leaving me with a flooded filter pit.
If that isn't likely to be an issue for you, and you are in no rush, keep an eye on these 2 Titan pumps from Screwfix, they sometimes have them on offer for £29.99 and £49.99 respectively:
https://www.screwfix.com/c/outdoor-g...0&page_start=0
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Frimley Koi keeper Thanked / Liked this Post
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22-04-2019, 10:45 PM #20
Every day feeding container?
Good shout, I'll have a look at Takazumi :)