Sewage Pump Buyers Guide
Sewage pumps are a type of water pumps used for pumping of sewage and effluents from bungalows, apartments, public buildings, schools, restaurants, hospitals, dewatering of trenches and pits, pumping water from docks, ports and vessels, cooling water for marine engines, etc. They gain their name due to the fact that they pump out waste water or water containing suspended solids.
They come in two categories: Dry surface pumps and submersible pumps. They come in various configurations to suit various uses for which they have been engineered.
In this guide you will find:
- What are sewage pumps used for?
- What types of sewage pump are there?
- Which is the right sewage pump for me?
- Is a sewage pump the right option?
- Installation information.
What are Sewage pumps Used For?
Sewage Pumps are used for pumping of sewage and effluents from bungalows, apartments, public buildings, schools, restaurants, hospitals, dewatering of trenches and pits, pumping water from docks, ports and vessels, cooling water for marine engines, etc.
Which Sewage Pump Do I Need?
Non-Clog Sewage Pumps
These pumps are meant to be used on dry surfaces with inbuilt self-priming mechanism. After installation once the pump casing is filled initially with the pumped liquid, the pump is ready to use. The specialty of these pumps is that they permit the pumping out of mud, dirt and suspended solids. These pumps are suitable for handling water and non-corrosive liquids. The self-priming action of the pump works on the principle of diffusion. After installation, the pump casing is completely filled with the pumping liquid which is retained by the flap valve assembly. When the pump is started, the flap valve opens and air from the suction pipe is mixed with the casing liquid. The mixture of air and liquid is transferred into the larger casing outside the pumping chamber and air escapes into the delivery branch from there. This process continues until all the air in the suction line is eliminated and the pump works as a centrifugal pump. These pumps can clear suspended solids measuring 7 mm to 15 mm.
Monoblock type: NMH-S 7040, NMH 7040
Coupled type: NCH 2250
Taro Submersible Dewatering Pumps
These pumps are designed with a semi-open vortex impeller that permits long fibrous materials and other solid waste to pass through without coming into contact with the impeller. A large clearance between the rotating open face of the semi-open vortex impeller and the discharge casing creates a vortex/whirlpool motion in this clearance. It is here that the suspended solids and fibrous material are discharged into the delivery pipe without passing through the rotating impeller. However, this type of pump can only clear suspended solids measuring up to 20 mm. The pump can be installed to stand freely on the bottom of the pit or suspended using a rope. Example products would be TSDP-SD S7050 and TSDP-SD T7050.
Taro Submersible Cutter Pumps
These pumps are designed with a cutter system that cuts solid particles into smaller pieces, so they can be conveyed through pipes of relatively small diameter. The casing houses a semi-open vortex impeller. A small, controlled clearance between the rotating open face of the semi-open vortex impeller and the casing creates a higher head. The compact design makes the pump suitable for both temporary and permanent installation. Cutter Pumps can clear suspended solids of any size provided they are soft and malleable. They cannot deal with hard objects like bones, wood, metal, concrete, stones, etc. The pump can be installed to stand freely on the bottom of the pit or suspended using a rope. Example products would be TSSC 40 11 T and TSSC 40 15 T.
For an exact match on the pump for your requirements, use a pump selector like the one we have here.
When is a Sewage Pump Not Right for Me?
- When there is no such requirement.
- When the liquid to be pumped out contains suspended solids that measure above 20 mm in case of submersible dewatering pump or the liquid contains hard solids that even a submersible cutter pump cannot deal with.
Sewage pumps must be installed by certified and experienced technicians only. This is not a job for untrained persons. This involves safety and operational protocols specified by manufacturer, EB, and government bodies (local, state, and central). Moreover, sewage pumps require routine and periodical maintenance since they deal with waste water that may contain contaminants harmful to human and animal health. They need to be cleaned periodically etc. This certainly involves technical expertise.
Taro sewage pumps are sold and serviced by a network of dealers who insure the pumps are installed by trained professionals and later inspected by company engineers if needed. Apart from this, the dealer files an installation and commissioning report for each customer which the company scrutinizes for appropriate installation protocol.