Submersible sewage pump performance?

[steveR]

I have a septic tank to pump out and am looking at one of these, hooked to a 1.5" outlet layflat hose.

Clarke SWP900A 1½" 1100W 350Lpm 9m Head Heavy Duty Submersible Sewage Pump with Float Switch (230V) - Machine Mart - Machine Mart

www.machinemart.co.uk

Lift would be in the order of 2-3m max, if that. What sort of pumping distance should I realistically expect of one of these will do on the dead flat. One possible job would be in the order of 200m, is this feasible...? It would allow me to not need to use a tanker!!

Or would I be better looking at a 2" outlet pump, but a smaller wattage pump? Like this

Clarke HSEC650A 2" 665W 290Lpm 9.5m Head Industrial Submersible Dirty Water Cutter Pump with Float Switch (230V) - Machine Mart - Machine Mart

www.machinemart.co.uk

 

[Steevo]

I had one of the sewage cutter pumps in a tank. After having trouble with a few I swapped it to just a standard pump. Debris can get the cutter pump clogged, whereas the standard pump has a gauze to stop debris getting into the mechanism.

 

[steveR]

I had one of the sewage cutter pumps in a tank. After having trouble with a few I swapped it to just a standard pump. Debris can get the cutter pump clogged, whereas the standard pump has a gauze to stop debris getting into the mechanism.

Pumping sewage, or just dirty water? I was looking at the more powerful pump, as it says it'll cope with larger solids

I don't thing a gauze will be of much help in a septic tank?

 

[Steevo]

Pumping sewage, or just dirty water? I was looking at the more powerful pump, as it says it'll cope with larger solids

I don't thing a gauze will be of much help in a septic tank?

Sewage. I suspended the pump off the floor but the float switch meant it caught floating particles that were close.

 

[Steevo]

Those MM prices seem to have jumped quite a bit since I bought mine too.

 

[steveR]

Those MM prices seem to have jumped quite a bit since I bought mine too.

Brexit innit... They are not the bargain place they appeared to be, so much online and of course Tool Stataion and Screwfix will bite into their market in some places.

Possible even some truth.... However, I have found the bigger one 35 quid less online.

 

[Steevo]

It’s worth checking out www.tradepumps.com too.

There are better brands than Clarke out there imo.

 

[Wisconsonian]

It will pump 200 meters no problem. It will be near the limit for pressure at that distance so you won't be getting 200 liters per minute, but it won't hurt the pump, and I'd guess it would be close to 100 l/m. I'd go with the higher head/lower volume pump for this job, you want to be in the center of the pump curve, not at either end of the pump curve. But the high pressure end will be the low wattage end, so fine for the motor.

 

[steveR]

It will pump 200 meters no problem. It will be near the limit for pressure at that distance so you won't be getting 200 liters per minute, but it won't hurt the pump, and I'd guess it would be close to 100 l/m. I'd go with the higher head/lower volume pump for this job, you want to be in the center of the pump curve, not at either end of the pump curve. But the high pressure end will be the low wattage end, so fine for the motor.

That's good to know. Might well get some more details on alternative pumps, as suggested, and get an order in.

It will not be a 24hr device, just lobbed in, as and when required

 

[Steevo]

This is what I ended up with last time having given up with the Clarke pumps. Still going well after 3 years.

JS JS-750 2" Automatic 240V Submersible Pump | Prestige Pumps

JS JS-750 Automatic 240V SUBMERSIBLE PUMP

www.prestigepumps.co.uk

 

[Ukjay]

I have looked into these two for my upcoming treatment system.

Zoeller 2702 Macerator Pump

The new Zoeller 2702 grinder pump for domestic and commercial applications. Features oil cooled cast iron body and hardend stainless steel shredding ring and macerating impeller Single phase only 2.05Kw Weight: 33 Kilo Up to 25m lift Fully Automatic with built in float Max flow: 200lpm Features...

www.sumpsandpumpsdirect.co.uk

JS GS Heavy Duty Sewage Grinder Macerator Pump - GS1200, GS1500

The GS-1200 and GS-1500 by JS are a range of heavy duty sewage grinder/sewage macerator single phase submersible pumps ideal for use where high

www.henrypumps.co.uk

 

[steveR]

This is what I ended up with last time having given up with the Clarke pumps. Still going well after 3 years.

JS JS-750 2" Automatic 240V Submersible Pump | Prestige Pumps

JS JS-750 Automatic 240V SUBMERSIBLE PUMP

www.prestigepumps.co.uk

Competitive price BUT, not suitable for sewage. It needs a grinder/cutter on the inlet.

 

[steveR]

I have looked into these two for my upcoming treatment system.

Zoeller 2702 Macerator Pump

The new Zoeller 2702 grinder pump for domestic and commercial applications. Features oil cooled cast iron body and hardend stainless steel shredding ring and macerating impeller Single phase only 2.05Kw Weight: 33 Kilo Up to 25m lift Fully Automatic with built in float Max flow: 200lpm Features...

www.sumpsandpumpsdirect.co.uk

JS GS Heavy Duty Sewage Grinder Macerator Pump - GS1200, GS1500

The GS-1200 and GS-1500 by JS are a range of heavy duty sewage grinder/sewage macerator single phase submersible pumps ideal for use where high

www.henrypumps.co.uk

That second pump is a BEAST!

It should cope with the "rubbish" put down the loo by female Tenants, who don't see a problem until the septic tank clogs up!!

 

[Slurry Solutions]

I have looked into these two for my upcoming treatment system.

Zoeller 2702 Macerator Pump

The new Zoeller 2702 grinder pump for domestic and commercial applications. Features oil cooled cast iron body and hardend stainless steel shredding ring and macerating impeller Single phase only 2.05Kw Weight: 33 Kilo Up to 25m lift Fully Automatic with built in float Max flow: 200lpm Features...

www.sumpsandpumpsdirect.co.uk

JS GS Heavy Duty Sewage Grinder Macerator Pump - GS1200, GS1500

The GS-1200 and GS-1500 by JS are a range of heavy duty sewage grinder/sewage macerator single phase submersible pumps ideal for use where high

www.henrypumps.co.uk

one thing to be wary of with single phase chopper pump is that if they stop with a lump of rag / rope in the cutter then a single phase motor will struggle to generate enough torque to restart the motor. Three phase is a different story all together.

 

[Ukjay]

one thing to be wary of with single phase chopper pump is that if they stop with a lump of rag / rope in the cutter then a single phase motor will struggle to generate enough torque to restart the motor. Three phase is a different story all together.

I agree, however not all installations have 3 phase available - so I would say that in this situation, one of the pumps with grinder / maceration abilities will be better suited to a standard pump.

 

[steveR]

I agree, however not all installations have 3 phase available - so I would say that in this situation, one of the pumps with grinder / maceration abilities will be better suited to a standard pump.

That is my take too. I have 3ph here by the farm, but in a couple of instances, it will be a single phase or even a generator supply being used in a mobile situation, hence a single phase pump here.

 

[Ukjay]

That second pump is a BEAST!

It should cope with the "rubbish" put down the loo by female Tenants, who don't see a problem until the septic tank clogs up!!

That's why I was looking at this to potentially give different instal options to my upcoming treatment plant installation - a bit of belt and braces approach.
It has the ability to reduce my digging out required due to having 3 mtr drop to contend with for where the treatment plant is going - as currently looking at drop back manholes.

 

[Ukjay]

That is my take too. I have 3ph here by the farm, but in a couple of instances, it will be a single phase or even a generator supply being used in a mobile situation, hence a single phase pump here.

Nothing like messing around with people's shite and objects shuved down the loo to get the gray matter working

 

[Steevo]

Competitive price BUT, not suitable for sewage. It needs a grinder/cutter on the inlet.

one thing to be wary of with single phase chopper pump is that if they stop with a lump of rag / rope in the cutter then a single phase motor will struggle to generate enough torque to restart the motor. Three phase is a different story all together.

This was exactly my experience hence why I stopped using chopper pumps and switched to a standard water pump that doesn’t need to copy with debris as it’s kept out of the mechanism.

A standard septic tank doesn’t allow solids near the outlet for exactly this reason. Just suck the solids out regularly.

 

[steveR]

This was exactly my experience hence why I stopped using chopper pumps and switched to a standard water pump that doesn’t need to copy with debris as it’s kept out of the mechanism.

A standard septic tank doesn’t allow solids near the outlet for exactly this reason. Just suck the solids out regularly.

Could you not have made a "filter" for the chopper pump you had?

I understand the theory of only pumping the liquid, but in my case, I am wanting to pump both together. if at all possible.