Toilet grinder pump: device, principle of operation and installation rules

Design and principle of operation

The design of the toilet pump consists of a housing in which a system for pumping liquids and chopper knives is placed.

The case is a compact box that can be installed behind the toilet leg, in the wall or behind a decorative panel so that the device does not spoil the interior of the bathroom. The device is connected to two systems - power supply and sewerage.

A chopper is installed in the upper part of the pump housing. Waste water enters the grinder tank, where solid waste is retained, and water flows further freely.If there is enough liquid, it starts the engine, and the knives and the pump itself begin to work.

The grinder cuts the waste, and the pump creates enough pressure to move it further through the pipes to the riser, from where it enters the septic tank or sewer.

The diameter of the outlet pipe is relatively small - about 45 mm, but due to the operation of the pump, wastewater does not linger and does not accumulate in the system. The system is equipped with a check valve so that wastewater does not return back through the pipe.

Designs in which the pump is located on top, and the chopper is lower are considered insufficiently effective, because. knives do not grind hard inclusions

Therefore, when choosing a particular model, it is worth paying attention to its design features.

If several appliances are installed in the bathroom, for example, a shower, a washbasin and a toilet bowl, then you can mount a combined system.

If, in addition, household appliances are connected, then it is better to invest in two pumps and install one for clean and one for dirty wastewater.

When installing pumps designed to be connected to several plumbing fixtures, complex calculations are required. If the power of the model is not enough, then the engine can quickly burn out. However, a properly selected device is able to pump all the drains from the toilet, bathtub, washing machine, etc.

Connection

For the pump, you need to choose a toilet with a direct drain, so it’s more rational to buy them together, in
same store at the same time.

The pumps are compatible with a straight flush toilet, the oblique flush toilet model will not fit!

Unfortunately, the pump manufacturer stipulates the installation of the unit only superficially, many technical
points are not affected.Therefore, the installation is best done by an experienced master. If you want to install
independently, then a minimum experience with plumbing is required.

Here are some points: If you need to turn the pipe 90 degrees, it is better to do it with two corners
45 degrees to avoid sharp turns in the path of sewage

You need to pay attention to the node connecting
pipe from a pump with a public sewer: "32" polypropylene pipe can be docked with a "40" sewer
wrapping tape on “32” until it fits snugly into “40” and coat the pipe before the joint with silicone sealant. You can do the same with the "25" polypropylene, joining it with the "32" sewer pipe

Further, all
it is joined by standard joints for sewer pipes - "32" or "40" pipes are joined by adapters into a "50" pipe
or more

It will not be superfluous to fasten the joints with self-tapping screws "seeds", the main thing is not to flash the pipes through, categorically not
it is recommended that the tip of the self-tapping screw stick out inside the pipe! It is important, if we approach the side of the main pipe with a drain, make
the connection is not at the “90” angle, but at the “45”, otherwise the water from the pump will “beat” into the wall of the main pipe, creating unnecessary
voltage. And the last: if possible, make a pipe insert from the pump closest to all other utilities to the drain,
leaving to the street, this will exclude the appearance of water pressure in other sewer outlets

Varieties

Despite the fact that the device and principle of operation of pumping fecal equipment are the same, there is a certain classification of such products:

1. According to the installation method, the units are divided into two types:
   • Built-in - mounted in the design of the toilet and do not have an outer casing, so they are cheaper.To start the pump, it is enough to drain the water in the toilet. A toilet bowl with a pump can only work on its own; it will not work to connect other sanitary appliances to the unit. In addition, with such an installation, repair and maintenance of the pump will be difficult. The advantages include the fact that the device does not take up space and does not affect the interior of the room in the country or in the house.
   • Free-standing units can be installed and connected behind the toilet. They are equipped with a sealed storage case and allow you to connect several sanitary appliances. The unit starts when the drains in the storage tank reach a certain level.

1. Also, such pumping equipment is divided according to the temperature of the pumped effluents. Various modifications can work with wastewater of a certain temperature:
   • If you want such a pump to serve only the toilet in the country, in an apartment or a country house, then it is better to choose a sewer unit for cold drains, the temperature of which does not exceed 40 ° C. The cost of such equipment is more acceptable.
   • For maintenance of household appliances and equipment from which hot drains are formed (dishwasher and washing machine), it is better to choose sewer pumping products for working with hot drains with temperatures up to 90 ° C.

1. Sewage pumps may or may not have a built-in grinder:
   • To service the toilet, it is better to choose units with chopping knives. This product can bring the effluent to a homogeneous fluid state, grinding large fecal matter, toilet paper and even synthetic fabric.After crushing, wastewater can be transported through a small diameter pipeline within 30-50 mm.
   • It is better not to use units without a chopper for toilet bowls. They are more suitable for servicing drains from bathtubs, showers, washing machines and washbasins. Their main advantage is their reasonable price.

The use of sewer pumps with a grinder operating in a hot environment is justified when arranging the sewer system in a large house, cottage. In an apartment, this option should be chosen if a complete redevelopment is carried out with the transfer of the bathroom and kitchen to a new place, remote from the sewer riser.

pump cutter

Regardless of the design, the cutting mechanism has one purpose - grinding impurities of organic origin to obtain a homogeneous flow. Some expensive reliable models can handle small pebbles and sand, but getting them into the machine should be the exception, not the rule. There are the following design types of cutting mechanisms:

An impeller with a cutting edge is the simplest and most inexpensive option. Almost all models were previously equipped with such a mechanism, but the performance of such pumps is not too high.

Fecal pump cutting device

• Two-bladed knife - blades located perpendicularly provide a fairly effective grinding of the components. There are also models with three blades, they are more productive and reliable.
• The combined cutting mechanism in the pumps involves the presence of three blades that are tightly pressed against a perforated membrane made of wear-resistant material.In addition to the fact that the inclusions are cut with a knife, they are additionally rubbed, passing through the diaphragm. As a result, a homogeneous mixture can be transported through pipes of small diameter.

What to look for when choosing a fecal cutter pump

The pumping equipment market is crowded today, which significantly complicates the choice of the required model, especially if you do not know the main characteristics that you should pay attention to:

• Frequency and duration of operation;
• pump immersion depth;
• Distance from the fence to the drain point;
• Select the desired performance;
• The diameter of the sewer pipe must match the diameter of the pump nozzles if the unit cannot be equipped with adapters;

When choosing a pump, take into account all the specified parameters in order to install the device without problems

• The purity of the pumped water and the diameter of possible inclusions;
• Engine power is one of the most important indicators, performance and service life directly depend on it, but along with this, the more power, the higher the cost of electricity.

Advice! When choosing a fecal pump, it is better to give preference to well-known brands such as Grundfoss, HOMA or Vortex (Germany), Sprut (China), Gileks (Russia), Espa (France), Sololift (Denmark), Vigicor (Spain). All these companies specialize in pumping equipment and in the event of a breakdown it will be easier to find the right part, and they are more willing to be repaired.

Model Selection Criteria

Of course, when choosing a device, it is better to seek help from professionals. But their services are very expensive, and there are not so many good specialists, so you need to try to figure it out yourself.

First, carefully read the instructions, because the most common mistake is the incorrect determination of the power of the pumping device. If, for example, the instructions indicate the parameters for transporting liquid by 8 m vertically and 90 m horizontally, which corresponds to the size of your sewer system, such a fecal pump should not be taken. This is explained by the fact that it will work at the limit of its power and any unforeseen load can lead to failure or even breakdown. So the best option would be to purchase a chopper with more power.

Secondly, it is necessary to take into account the duration of the path of the transported liquid. So, for example, if wastewater moves only horizontally, such a grinder can do this for a maximum of 90 meters. And if at the same time you also need to raise a meter by two, the delivery range will be significantly reduced. The recommended calculation formula is: the liquid transportation distance is reduced by 10 meters for each meter of its rise.

How to choose a fecal pump?

An improperly selected pump will be inefficient and can cause a lot of inconvenience to the owner of the house.

To buy exactly the model that will best suit the operating conditions, you should pay attention to several aspects:

• Performance. You can determine the required performance by knowing the volume of wastewater and the desired speed of their pumping.
• The diameter of the sewer pipe through which wastewater will be transported.
• Approximate sizes of solid inclusions. This is especially true if household waste from the kitchen is drained into the sewer.
• The distance over which the drains will move.
• Presence/absence of additional equipment.It is necessary to calculate the amount of wastewater that can come from each plumbing fixture that will be connected to the pump.
• Drain temperature. The choice of model type depends on this indicator. If the pump is connected only to the toilet, then you can get by with a device for pumping cold drains. In the case of connecting other devices, it is better to give preference to a more expensive, but also more reliable model for hot wastewater.

How you can equip a bathroom with a fecal pump is described in the video:

The nuances of calculating power

The universal formula for calculating the power of a fecal pump: H + L / 10 \u003d X, where:

X - the height to which the drains move (this indicator must be determined);

H is the depth at which the pump is installed;

L is the length of the pipeline in meters (from the place of discharge of wastewater to the septic tank or collector).

All pump models are accompanied by technical documentation, which indicates their parameters.

When choosing, you should pay attention that the numbers in the passports are the maximum allowable indicators.

This means that if the documents indicate that the equipment moves liquid 5 m in height and 60 in length, then for a greater distance, you need to choose a more powerful model.

There is a widespread misconception that total indicators can be considered - add up the distances along the length and height. However, this is a misconception about the operation of pumping equipment.

It is necessary to select just such a model that will "fit" into the pre-made calculations both in height and along the length of the pipeline, otherwise violations in the operation of the devices are not ruled out.

Which brand do you prefer?

When choosing a model, you should pay attention not only to the technical characteristics, but also to the manufacturer.There are several popular brands that buyers respond well to:

• Sanipack. Ideal for small spaces. The pump is very compact and can be wall mounted. Moves drains 4 m in height, 40 m in length. The maximum temperature of the working fluid is 40-50 degrees, the optimum is 35. The cost is 19,500 rubles.
• Grundfos SEG. Like all Grundfos brand equipment, these are quality pumps. This model pumps drains at a distance of 15 m. It is universal, trouble-free, very convenient to use. The only thing that can confuse buyers is the cost - from 50,000 rubles.
• Jemix STP 100. High performance model. Suitable for systems where the length of the pipeline is 70 m, and the lifting height does not exceed 7 m. The pump with a grinder is designed for hot wastewater, the temperature of which can reach 90 degrees. The cost is about 7000 rubles.
• Gilex. These are sanitary toilet pumps. By design - submersible. The main advantage of Gileks brand devices is their low price. The cheapest model will cost about 4000 rubles. The disadvantage is one connection. The pump can only be used for the toilet.
• S.F.A. Sanito. The model is connected to the toilet and sink. The pump is equipped with a grinder. The body is made of durable plastic, durable. The cost is 17200 rubles.
• Sanico Compact Elite. Combined model built into the floor-mounted toilet. The device is designed for a working fluid temperature of 40-50 degrees, but it is better if it does not exceed 35. Waste water rises 3 m in height and pumps 30 m in length. The control system is very convenient, the device can be programmed. The cost of the model is about 30500 rubles.

More about Sanicompact Elite is described in the video below, the installation features are described:

The principle of operation of the toilet pump: device

The most commonly purchased cold waste chopper pump ensures that solid waste is crushed into small pieces and drained to the sewer, even if it is located a long distance and above the toilet.

Usually it is mounted on the wall so as not to attract additional attention to it and not to spoil the interior of the toilet room. For full-fledged work, it is connected to the mains using an outlet, a toilet bowl and a pipe leading to the sewer

The grinder is located at the top of the device. In it, after entering the structure, solid waste settles. Liquid drains move on without stopping. As a certain amount of waste accumulates in the chopper, the pump comes into operation: the chopper knives crush solid waste, and the pump forces them to move through the sewer pipe.

Grinders built directly into the toilet do not have their own capacity. They start working when the flush button is pressed. The knife grinds the solid waste, and the water from the tap flushes it down the sewer. Such devices do not have a drain tank, water comes directly from the water supply system. It is for this reason that it is not possible to install such a compact unit in every apartment. The pressure in the pipes of the building must be high enough to provide pressure: from 17 atmospheres.

The device is not complicated, but you need to know the nuances

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:

Transportation distance	This parameter affects the power of the pump. The farther from the bathroom the gravity sewer pipe runs, the larger it should be. The usual capacity for transporting sewage is approximately 100 m horizontally and up to 10 m vertically, which is sufficient in most cases.
Optional equipment	When the bathroom provides not only a toilet, but also a washbasin and a shower cabin, it is not necessary to install a separate pump for each element of the system. We recommend buying a combined device.
Recommended Fluid Temperature	This parameter is located in the range of 40-90˚С for different equipment options: For example, if you need a grinder only for the toilet, it is enough to purchase a device for cold environments. Another thing is when you decide to connect a washbasin or shower cabin to it. In this case, the maximum allowable temperature of the transported liquid must be higher. Usually the highest price will be at the pump, to which it is supposed to additionally connect a washing machine or dishwasher. This is due primarily to the fact that this equipment drains water into the sewer at a temperature of up to 90 ° C.

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.

Installation and connection rules

Installation and connection of pumps for toilet bowls and forced pumping of drains from different manufacturers occurs according to very similar rules. But before installation, you should read the instructions for a specific product - there may be features.

A sewage pump can stand in the kitchen - to drain drains from the sink and / or dishwasher

Connection

The installation location must be chosen so that the pump can be reached. It does not require special maintenance, but periodically there is a need for cleaning.If a dishwasher and a washing machine are connected to the pump, it is better to regularly check whether the sewer installation is clogged with grease, dirt, and salt deposits. If necessary, cleaning with mild detergents is possible. Aggressive chemicals should not be used, as they can damage the plastic and rubber parts of the unit.

If the sewer inlet is higher than necessary

So here are the general rules:

• The individual sewer installation must be grounded. Therefore, the outlet must be three-wire with a working ground. (We read about the device of a ground loop in a private house here).
• For safety, a circuit breaker and RCD must be installed on the power line.

• During installation, the block is fixed to the floor. To reduce the noise level, installation on a vibration-damping base (rubber gasket) is desirable. It is undesirable to press the case against the wall - so that vibration from the pump is not transmitted. These measures are necessary to reduce the noise level.

• The exhaust pipeline is made of rigid plumbing pipes. There are two recommended options - plastic sewer and copper pipes. Fittings are recommended rigid, one-piece.
• Pipelines must be permanently fixed (to walls, floors, etc.).

In general, installing and connecting a sewer pump for a kitchen or toilet is not a very difficult undertaking. But provided that you already have some idea about working with plumbing. In this case, you can do everything yourself.

Outlet pipeline features

Compact plumbing toilet pumps can pump drains not only vertically, but can also lift them up.If there is a vertical section in its lower part, it is desirable to provide for the possibility of draining - if you have to clear the pipeline from blockage, it is better if the drains are drained in a certain place, and do not start pouring out during work.

The height of the vertical section of the discharge pipeline is determined taking into account the minimum slope of the horizontal section. Each manufacturer (sometimes each model) has its own minimum slope, but in most cases it is 1-4% (1-4 cm per 1 meter).

Sewer pump installation rules

Be careful. The description of the sewage pumps indicates the maximum lifting height of the sewage and the maximum horizontal transport distance. For example: 8 m up, and 80 m horizontally. But this does not mean that by lifting the pipe 4 meters up, it will be possible to transport another 80 meters horizontally. In this case, after a four-meter rise, the length of the horizontal section will be no more than 40 meters. Just lifting 1 meter up “takes away” about 10 meters of horizontal transport

This is important and worth remembering.

Popular and best manufacturers on the market: Grundfos, Gileks, Herz, Wilo, cutting Sturm wp9709sw

Today, the stores offer a wide selection of grinder pumps of any power, configuration and size that you may need. You can take an inexpensive Russian or Chinese appliance, or you can invest in expensive European plumbing.

If we talk about models, then the Grundfos sewer pump is especially in demand. The average price for a similar sewer pump with a chopper ranges from 35-55 thousand rubles. Grundfos sewer installations eliminate the need to purchase a toilet with a grinder, because.the pumps built into the station are already equipped with a cutting device. The fecal pump with a grinder for the toilet should only be of a quality brand.

A distinctive feature of Sololift pumps is that the control unit is connected to the pump and motor in one unit. Such a device simplifies the repair of the unit in the event of a breakdown. During the repair, you do not have to dismantle the pump and the space around remains clean, even if you had to dig into the mechanism. The Grundfos fecal pump with a grinder has enough power to ensure the movement of wastewater through pipes of any slope, vertical and horizontal, within the capacity of a particular model.

SFA brand sewage pumps are also a worthwhile choice. This manufacturer offers an impressive range of sewage pumps. They are suitable for kitchen sinks, washing machines and dishwashers and, of course, bathrooms and toilets. For any type of equipment that requires the removal of waste water, there is an option. Pumps of this brand are equipped with sealed tanks and powerful cutting mechanisms.

The SFA pump has proven itself in everyday life

Installing the grinder pump

You don't have to be a professional to install a grinder pump in your washroom. If you follow all the rules and subtleties of this procedure, you can do the installation of pumping equipment with your own hands at home.

The installation of the grinder should always be started by checking the diameter of its inlet pipe. It must completely match the diameter of the sewer pipes. Otherwise, you will not be able to connect these two parts.

The installation of the described device is always carried out according to the following step-by-step instructions:

1. First of all, inlet pipes or plugs are mounted in all inlet pipes. At the same time, when connecting, it is necessary to be careful that the line approaches the device at a slope of three centimeters for every one meter of length.
2. Next, the chopper is placed in the place where it will be permanently located in the future, and attached to the floor. The last manipulation is carried out with the help of dowels and a construction puncher.
3. Then a sewer pipe from the grinder is led to the riser. If there are several pipes, they must be glued or soldered. If the pipe needs to be diverted in a vertical direction, then the pipe part should be turned so that it is no further than thirty centimeters from the outlet of the pumping equipment.
4. After that, the toilet is connected to the pump using corrugations. This takes into account the fact that the entrance to the chopper body must be below the level of the toilet pipe. It is also necessary to tilt the drain pipe so that the drains move on their own.
5. Finally, the installed device is connected to the network, after which the device is checked. During operation of the unit, the pipe joints are checked for leaks.

If it seems to you that you cannot install a toilet bowl grinder yourself, we recommend that you watch the video below. It not only tells, but also shows the entire process of installing the described unit at home. You will be able to see all the nuances of this procedure that we could not describe in a nutshell in this article. We hope everything works out for you, and your plumbing will always work properly.

Manufacturers and models

In this area, individual installations are not produced by every company.But the range of prices even in such conditions remains wide. Good quality but high prices - standard specifications for manufacturers from Europe.

Grundfos-Sololift

Sololift2 is the latest variety on the market. The design has no moving parts in contact with drains. There is a chopper inside, but it is also equipped with a “dry” drive. Different models are available for different situations

Sololift:

1. D2. Toilet bowl grinder pump operating at liquid temperatures up to 90+ degrees. It is not used with solid impurities. Attaches to machines for linen and dishes, showers, washbasins.
2. C3. The pump sewer with big productivity. Pumps out drains with a temperature of 90 degrees.
3. CWC3. Model for connection of hinged models of toilet bowls.
4. WC3 - a variety with a chopper. With three additional outlets, direct connection to the toilet.
5. WC1. The model has its own grinder. There is one main, one additional exit.

The equipment of this company is not the cheapest, but it guarantees stable operation for a long time. The manufacturer is characterized by support for warranty repairs.

SFA

Several models are presented, each of which solves specific problems:

1. SaniTop - sewer with forced movement, connect it to sinks, toilets. Quiet operation, high power.
2. Sanipro XR Silence. The quietest model that allows you to pump out drains.
3. SaniplusSilence. Sewage pump of increased power, easily connected to several devices. Silent operation, high performance.
4. Sanipack. With small sizes.
5. Sanibroyeur. With chopper, distance up to 4 meters vertically, up to 100 meters horizontally.
6. Sanibest.Suitable for private houses where the sewer system is operated intensively.
7. Saniaccess. Household model, which is connected to the bath, washbasins.

The products of this company are cheaper than the previous analogue. It is easy to choose an option, regardless of what plumbing is required. Installation is carried out practically without restrictions. The grinder pump shouldn't be a problem.