Types of fecal pumps: how to choose the right equipment for your needs

8 Quattro Elementi Sewage 1700F Ci (1700 W)

A distinctive feature of this fecal pump is the ability to pump liquids with organic and inorganic impurities, therefore it is widely used not only in private houses or when digging wells and pits, but also in road repair work, in the construction industry. A metal impeller and a reliable body made of cast iron easily pass fractions up to 20 mm in diameter, and a power of 1700 W increases productivity (pumping up to 30,000 liters in one hour) and allows you to create a water head 18 m high.

To protect the device with a chopper from overheating at idle, there is a float switch that reacts to a critical water level. The universal size connector is suitable for quick installation of hoses with different diameters - there will be no problems and additional costs with connection. For ease of carrying or hanging in a vertical position, a handle is provided on the top of the pump.

Fee Pump Selection Options

When selecting any fecal pump, there are a number of basic characteristics that determine the efficiency of the device in the right conditions. These characteristics include:

1. Power or performance;
2. Throughput or diameter of the suction pipe;
3. Type of instalation;
4. When choosing a submersible or semi-submersible type, the installation depth of the structure also plays an important role.

There is a direct proportionality between the power and the diametrical size of the suction pipe. The higher the performance, the larger the hose. In addition, the power depends on the depth of immersion of the device. The lower the device is lowered, the higher the wastewater will need to be raised.

Industrial sewage pump

To calculate the required height of the drains, you can use the following formula:

L+l/10, where

L is the immersion depth of the device, l is the length of the hose (or the distance from the cesspool to the place where the waste is drained). 10 is a standard coefficient, it is determined from the rule that 1 meter of vertical length equals 10 horizontal meters (based on the ratio of power costs).

The resulting number is a measure of performance. Already starting from it, you can choose the right fecal pump for any pit.

Standard sizes of fecal stations

The difference between fecal pumps and drainage pumps is that they are able not only to transport solid wastewater, but also to crush them. Therefore, there are models with shredders and without them.

1. Chopper options are more functional. They can cut solid masses up to the throughput diameter of the pipe, which allows you not to overpay for professional pumps. They, in turn, are also divided into models with a "cold" and "hot" type of work;
2. Devices without a chopper are more convenient and practical. Their dimensions are much smaller than with a chopper, so they are perfect for use in a small house or apartment.

Experts recommend giving preference to options with grinders for hot water. They cost a little more than others, but are more functional.

When choosing, it is worth giving preference to well-known manufacturing companies. A feature of fecal pumps is their relatively short lifespan. Due to hazardous operating conditions and aggressive environmental influences, these devices are prone to failure. Many manufacturers provide warranty repairs or even complete hardware replacements.

Dealing with equipment

1. In appearance, the pump resembles a small plastic box that is installed behind the toilet shelf.
2. The device does not spoil the aesthetics of the bathroom and looks like an additional drain tank.

Fecal equipment does not spoil the appearance of the bathroom

1. Standard models of such pumps are designed to transport fecal matter horizontally up to 100m, vertically up to 10m. Although there are more powerful devices.

Toilets for giving with a pump allow you to pump liquid up to 80-100m horizontally

Main characteristics

When choosing equipment for the forced movement of drains, we recommend paying attention to the following features of the devices:

Fecal pump with a grinder for the toilet to create a forced sewer system

If a wall hung toilet is installed

In a small room, if you need to save space as much as possible, hanging models of toilet bowls are often placed.For such sanitary equipment, specially designed devices are offered, in which the width of the tank is approximately 120 mm. It can simply be disguised in a drywall box, in which a frame for attaching the toilet bowl and a cistern are also installed.

Relatively recently, retail chains began selling toilet bowls that are equipped with a built-in chopper. This device is also designed to connect additional plumbing equipment to it. This type of toilet is not equipped with a cistern.

When the drain button is pressed, water from the water pipe opens and at the same time the grinder turns on. A mandatory requirement for the installation of this equipment is that the pressure in the water supply network must be at least 1.7 bar.

Calculation of the required power

We want to warn you that even if the instructions clearly describe all the main characteristics of the equipment, it is quite easy to make a mistake with the choice. It is not always possible to find a good specialist in this profile, so we will deal with this issue on our own.

In the photo - a sewer pump for the kitchen

The most common mistake is the wrong choice of device power. For example, if the instructions indicate that the pump can pump liquid horizontally by 80 m, and vertically by 7 m, this does not mean at all that everything will be so.

Why?

Let's figure it out:

1. The operating instructions usually indicate extreme parameters. These situations for the pump are peak, so any unaccounted for load will immediately lead to a malfunction.

1. The characteristics presented in the instructions can be called mutually exclusive.This is due to the fact that when transporting liquid only in a horizontal plane, the pump can advance it by a maximum of 80 m, but when it has to be raised by 2-3 m, the supply range will decrease significantly. We suggest you use the following calculation formula - for each meter of ascent, the horizontal transportation distance is reduced by 10 m.

Installation Features

Do not worry, even if you have never worked with such equipment, you can easily connect it to the toilet with your own hands. When installing a pipeline from a pump to a sewer, you need to know only two parameters - the height and length of the lift.

Forced sewage scheme

They must match the characteristics of the grinder. The rest of the data related to the angle of elevation, the materials used and the configuration of the line can be anything.

The device of the fecal pump and a few words about the chopper

In the design of the unit for removing fecal effluents, 4 parts can be distinguished:

• the engine converts the energy of the carrier into the movement of the working element of the pump;
• the working element pushes drains;
• entrance channel - the place of entry of sewage;
• outlet pipe - an element to which a hose or pipe is attached to drain fluid.

Pump device

Many varieties are equipped with such an important device as a chopper. These are knives installed at the inlet of the pump, moving at high speed, cutting branches, paper, bags and other debris into small pieces that can clog the parts of the pump or pipe itself.

The cutting device may have a different look, but the most common is the impeller, the blades of which are knives.

chopper

Additionally, some units are equipped with a float that allows you to automatically turn off the engine to avoid idling. Consider other design and functional features of various types of fecal pumping equipment.

Submersible sewage pump

The submersible type is used for pumping water from basements, mines and other tanks. The principle of its operation is that it is completely immersed in the pumped liquid. Suction occurs through the bottom of the unit, which is equipped according to the intended purpose. The main task of a submersible fecal pump is to pump out very dirty water, fecal masses and sewage containing large fractions and long fibers. That is why its flow channels are extremely large so as not to become clogged with the contents of the pumped masses.

The pump is supplied with a ten-meter cable for deep work

It is also important that the package includes a float switch. It is connected to the engine and turns it on (off) in response to a change in the level of sewage

The body of the submersible device is usually made of stainless steel or cast iron, which makes it heavy. This quality gives him the advantage to give out a jet with a capacity of up to 400 m3 per hour and with a pressure of up to 20 meters. Such indicators are provided thanks to the operation of an electric motor with a power of up to 40 kW.

This unit can easily pump very contaminated liquids, however, with a fraction diameter of more than 35 mm, it should be equipped with a grinder, otherwise important parts may fail. The grinder will crush them into components that are safer in size.

The best fecal pumps of the elite class

Pedrollo VXCm 15/50-F - the best stationary sewage pump

Pedrollo VXCm 15/50-F is a weighty cast iron submersible unit. Equipped with a single-phase motor with thermal protection, as well as a wet rotor pump and a VORTEX impeller.

With the help of a float, 2 hinges and a flange, respectively, it automatically works and stops when running dry, it is permanently installed vertically and connected to the pipeline. It plunges to a depth of 10 m, the head creates 11.5 m.

Pros:

• wear resistance, extreme strength and long service life: components and parts are made of stainless steel and thick cast iron;
• high efficiency and productivity: with a power of 1.1 kW, the supply is 36 m3 / h;
• protection against overheating, jamming and idling;
• the use in Pedrollo VXCm 15 / 50-F of a special design impeller - type VORTEX;
• large sizes of milled inclusions: 50 mm.

Minuses:

• heavy weight (36.9 kg);
• high price: 49.3-53.5 thousand rubles.

Grundfos SEG 40.09.2.1.502 - the best innovative sewage pump

Grundfos SEG 40.09.2.1.502 is an innovative submersible unit with a modular design. At the device, the motor and pump housing are connected by a clamp, the shaft has a cartridge connection, the flanged outlet is located horizontally.

The machine turns on by default at a liquid depth of 25 cm. At the inlet, it cuts particles Ø 10 mm. Characteristics: power 0.9 kW, capacity 15 m3/h, immersion depth 10 m, lifting height 14.5 m.

Pros:

• ease of use: the built-in level switch is used (AUTOADAPT system), the use of a remote control is allowed;
• in Grundfos SEG 40.09.2.1.502 the gap between the casing and the impeller is adjustable;
• strength and reliability: new technologies are combined with durable wear-resistant materials - cast iron and stainless steel;
• total protection, including against dry running and overheating: thermal sensors are built into the stator windings;
• well-thought-out design (even in small things): a long power cord (15 m), a specially designed handle.

Minuses:

• high cost: 66.9-78.9 thousand rubles;
• significant weight: 38.0 kg.

Drainage and fecal - what's the difference

There are two types of pumps for pumping contaminated water: drainage and fecal. How are they different? Drainage are designed to drain polluted waters containing small solid inclusions - silt, sand and other substances of approximately the same size. To prevent larger particles from getting inside, meshes are installed. As you understand from the description, drainage pumps are suitable for pumping clarified water from a storage well located after a septic tank, for pumping water from a storage well for drainage and storm sewers.

A fecal sewer pump differs from a drainage pump in that it can pump viscous media with rather large solid particles.

If you need to pump out sludge from an automatic individual cleaning plant (such as Topas or others), or sediment from the bottom of a septic tank, the drainer will not cope with this. Too dense environment. For a septic tank, there is, in principle, a way out, stir up the sediment, pump out the suspension, pour water again, shake it up again and pump it out again. It is possible to do this, but the septic tank will then enter the operating mode for a very long time, so this method can be used only in extreme cases.It is better to purchase special equipment that will cope with the compressed sediment.

Sewer pumps are used to clean cesspools and septic tanks. They can handle heavily contaminated liquids, viscous media that may contain solid particles. The particle size depends on the model, but the maximum value is 50 mm. Not always in the cesspool, all waste rots to such a state. To be able to cope with the situation, a chopper is installed at the bottom of the pump. It is usually placed on centrifugal models - additional cutting blades are installed on the shaft. Effluent already crushed enters the working body of the pump.

So if you plan to use a fecal pump to pump out a cesspool, it is desirable that a grinder be present in the model. It grinds larger particles to acceptable sizes.

Types of pumps

For domestic waste, it is recommended to choose a model with a grinder

In order to choose the right fecal pump for pumping out a cesspool, you need to know what models are on sale, what they are for, how they work and what conditions they are designed for.

Main parameters:

• design features;
• power;
• the presence or absence of a grinder;
• material of manufacture;
• the presence or absence of a float;
• ability to work with liquids of different temperatures.

There are three main designs of fecal pumps:

• submersible;
• semi-submersible;
• superficial.

Submersible models work in the lower layer of drains. Since they are forced to constantly be in the liquid, they are made of durable materials - cast iron, stainless steel or heat-resistant plastic.The tightness of the parts is the main requirement, since the ingress of liquid waste into the case will make the device unsuitable for further use. The noise from the submersible mechanism is practically inaudible, the engine is self-cooling due to wastewater.

The body of semi-submersible models is located above the surface of the drains, its lower part is immersed in the liquid. The unit resembles a float. There are options when a suction pipe leaves the body, but such mechanisms are not equipped with a grinder. This is a noisier device, it can be taken out and repaired or used for other purposes. There is no need to make the body of expensive materials, as it is not exposed to aggressive environments.

Surface fecal pumps are mechanisms, the body of which is located at some distance from the cesspool, the liquid moves through a plastic corrugated pipe or sleeve. The running motor makes a loud noise, so it is not installed near the living quarters. The advantage of a surface fecal pump is that it can be used for various purposes on the farm, moved from one place to another.

The float is an additional safety feature. Monitors the liquid level and, if necessary, turns off the device. With a float, the pump operates automatically. The rating of fecal sewage pumps in a private house indicates that models with choppers and floats are popular.

Features of the choice of pumps

To choose the right option for a fecal pump for a summer residence or a country house, you need to make certain calculations using the following data:

• the depth to which it is planned to lower the pump;
• the distance to which it is necessary to deliver fecal matter;
• the performance of the apparatus, in other words, the amount of liquid pumped by the pump in cubic meters per hour of operation or liters per minute;
• sizes of solids that may be present in the pumped liquid;
• the size of the pipeline used to deliver contaminated water to the septic tank.

When determining the height to which it is planned to deliver wastewater, a number of nuances should be taken into account. To the depth to which the pump will descend, add the length of the hose, with which the septic tank is connected to the cesspool, previously divided by 10.

By dividing, you can match the vertical and horizontal direction of the sewer line and hose. Let's look at this with an example. In order to extract faecal masses at a depth of 6 meters and deliver them at a distance of 10 meters, it is necessary to use a fecal pumping apparatus that can lift waste to a height of 7 meters.

All proposed pumping units can be classified into the following types:

• devices that do not include a grinder in the design;
• device equipped with a grinder.

Let's pay attention to the features of these devices, based on the temperature of the transported effluents

• Apparatus for hot drains. Units that do not have a grinder in their design can be used to extract liquid from sinks, bathtubs, washing machines and dishwashers. You can not do without these installations even when it is planned to move the kitchen or bathroom to another place in the house.Units for hot wastewater without a mixer effectively pump out water that has a temperature not higher than 90 degrees. More functional are models with a grinder, since they can be used at higher temperatures, and they can also grind larger inclusions.
• Apparatus for cold drains. A feature of models of fecal pumps that do not have a grinder in their design is that they can serve several types of plumbing equipment at the same time. It should be borne in mind that such installations are designed for a certain temperature of the working fluid (up to 40 degrees).

Types of fecal pumps

In the manufacture of pumping equipment designed for pumping heavily polluted water, durable and chemically inert materials are used:

• high-quality steel grades, including stainless steel;
• cast iron;
• special types of plastic.

The vast majority of sewage pumps have a centrifugal type design with an electric motor and a pumping device arranged in a single unit. They are usually arranged coaxially and placed in a common housing. According to the type of installation, the models are divided into:

• submersible;
• semi-submersible;
• superficial.

When planning to purchase a pump for fecal sewage, you should know the features of its design and method of application.

Submersible pump

Such a device is located under a layer of liquid at the bottom of the container. It has a sealed housing that reliably protects the engine from water ingress. Manufacturers usually equip such pumps with a shredder.

The design of the receiving unit eliminates the tight fit of the unit on sand or silt, which ensures reliable operation.It can be installed permanently, providing for reliable fastening to the supporting structures, connection of the exhaust hose for the fecal pump and electric cable.

Advice! This option is perfect for the fecal sewage of an individual house used for living all year round.

With occasional use, a mobile way to install a submersible pump is convenient. At the right time, it is lowered into the tank on a chain or cable with an outlet hose already connected. This is usually done by summer residents and owners of country houses intended for seasonal recreation. In this case, the process of cleaning and repairing equipment is simplified, which can be taken away for storage for the winter.

semi-submersible pump

A distinctive feature of the design of such units for draining liquid waste is an elongated shaft connecting the impeller to the engine. This allows pumping without lowering the motor into the water.

Such pumps are conveniently fixed in a vertical position on a floating platform or installed on the inner wall of the tank. In the latter case, an automatic liquid level control sensor is required, which gives a start command when water approaches the engine. Smaller models may be intended for occasional use. At the same time, they are manually hung at the edge of the container.

Surface pump

Surface-type drainage-fecal pumps are installed at ground level or mounted outside the tank. Only the receiving pipe or hose goes inside. Such models are designed for a certain suction height and are not able to take liquid from a great depth. They are very sensitive to inhomogeneous mixtures and can fail under such conditions.But their design is simple, which allows you to produce very inexpensive products.

A few words about the principle of work

The fecal pump is a device consisting of a body, a cover, a cutting part and an engine. It works on the principle of a vortex mechanism. A flat disk is installed in the body, which pumps water. Depending on its configuration, it can also grind drains right away. But, in most cases, the chopper is a separate part of the design.

The design of the fecal pump with a grinder

Such a design is very beneficial, because with such work, not only a large amount of wastewater is captured, but also their pressure at the outlet increases significantly.

Fecal pumps of automatic type of action are equipped with sensors that respond to changes in pressure. When the liquid enters the membrane, the mechanism for draining the wastewater and grinding it starts. After that, the rest of the masses are transported further along the riser (when installed in an apartment environment) or into a separate tank.

Conclusions and useful video on the topic

Before choosing a model of a fecal pump, it will not be superfluous to see how it works and listen to the recommendations of experts.

A good example of how a grinder device works:

Popular models of fecal pumps:

Properly approaching the choice of a sewer pump, you can, with a minimum of effort, remove pollution from the cesspool. Without saving on the purchase of a quality unit, you can be sure that it will serve you well for more than one year.

Looking for an efficient fecal pump? Or do you have experience with these setups? Please leave comments on the article and share your impressions about the operation of pumping units.