Sewer pump installation

The layout of the location of bathrooms and plumbing fixtures in country houses and cottages is always fraught with the difficulty that they must be located close to the sewer riser. Also, the pipes leading to the riser must have a slope in its direction so that the wastewater can move by gravity. Such conventions impose certain restrictions - all plumbing should be located close to each other. This problem becomes irrelevant if sewer pumps are installed. The use of these pumps allows you to install a toilet, washing machine, shower and other appliances where it is convenient for you, in the basement or basement - below the location of the main sewer pipe. This is especially true for cafes, restaurants and sports clubs located in the basement of high-rise buildings. Sometimes in country houses they install fecal submersible pumps that process wastewater from the whole house and pump it into a septic tank. Such pumps are different from those described above, and in order not to be mistaken, it is necessary to understand what pump is intended for.

Types of sewer pumps

Sewage pumps can be roughly divided into two categories: domestic and industrial. Household pumps are designed for pumping wastewater from one or more consumers and can be used in country houses, private small hotels, cafes, restaurants, bars, clubs and shops. Industrial sewage pumps are installed in multi-storey buildings or even in substations leading to a sewer.

Domestic sewer pumps

Sewage pumps for domestic needs differ in purpose and place where they are used, and also have design differences. For example, there are pumps that are installed directly under the water consumer, and there are pumps for forced sewage that are installed in a septic tank well or sewage pumping station.

Domestic sewer pumps are available in the following versions:

• (equipped with grinder).

A pump of this type is installed directly behind the toilet no further than 40 cm and is a box, about the size of a toilet flush tank. The color of the pump body can be chosen so that it matches the color of the toilet bowl and is not conspicuous. The unit is connected to the outlet pipe from the toilet. When the water in the toilet is drained, it fills the pump, where the metal chopper blades grind the fecal matter and toilet paper. With more serious debris, such as a towel and personal hygiene products, such a pump will not cope.

After shredding the waste, wastewater is fed through the pipeline to the sewer riser. Typically, these toilet pumps are capable of pumping liquids up to 10 m in height and up to 100 m in a horizontal plane. After the wastewater is sent to the sewer, the water seal of the toilet bowl is filled with water again.

Pipes draining from the pump can have a diameter of 18 mm to 40 mm. This allows them to be laid without harming the overall design of the room, for example, behind plasterboard or under the ceiling. Chopper pumps allow you to install toilets in any room, regardless of the location of the sewer riser, as well as below the location of the main sewer. For example, it can be a basement, a basement floor, redevelopment in a typical apartment and moving a bathroom to another place.

For such sewer pumps, the price depends on the manufacturer. For example, the popular French pumps of the company Grundfos Sololift2 WC-1 And Sololift2 WC-3 cost 350 USD and 450 c.u. respectively. These are reliable units for which a guarantee is issued. In addition, in the CIS countries there is a fairly developed network of service centers that install and repair sewer pumps of this brand. Pumps from another French company SFA (direct competitor) are in about the same price range. Model SFA Sani Broyeur Silence costs, for example, 350 USD. Although they are a little cheaper, they have less power and pump to a lower height. But the pump of the Russian company Subline Service called Unipump Sanivort 600 will cost only 200 USD.

The maximum temperature of wastewater that the toilet pump can pump is in the range of +35 °C - +50 °C. For more details, please refer to the instructions for the specific model. Also, many pumps have an additional inlet for draining from a washbasin, shower or bidet, urinal. Therefore, the temperature of the water is of great importance. If the water temperature is much higher, the pump may fail, although some models have protection that allows hot water to be pumped for a short time (30 minutes), but not constantly.

In addition to toilet pumps, which are a box measuring approximately 30x45x16 cm, there are also built-in chopper pumps for hanging toilets. They have compact dimensions, the thickness does not exceed 12 cm, so it is convenient to hide them behind a plasterboard partition.

There are also models that combine a toilet bowl and a pump without a drain tank. This device is not cheap SFA Sanicompact 43 costs 900 - 1000 USD), but it is convenient and takes up little space. The toilet bowl is connected directly to the water supply network and has an additional outlet for draining from the washbasin.

• (without grinder).

Such pumps are also called sanitary, as they pump dirty water, but are not equipped with a grinder, which means that the drained water should not contain foreign objects. Sewage pumps for the kitchen have several inlets, so you can connect the drain from the sink in the kitchen, bathroom, shower and washbasin to them. They are installed in the cabinet under the sink or any convenient place. Pay attention to the maximum wastewater temperature that such a pump can pump. For example, model Sololift2 D-2 for shower, bidet and sink is designed for water temperature not higher than +50 °C. This means that you cannot connect a dishwasher and washing machine to it. It is also important that kitchen pumps quickly become covered with a greasy coating from the inside and require timely cleaning.

This category of sewage pumps must be singled out separately. Such units can drain hot wastewater from washing machines and dishwashers, as well as bathtubs and showers. For example, for a pump Grundfos Sololift2 C-3 you can connect a sink, dishwasher, bathtub and shower. The water temperature should be no higher than +75 °C, for a short time the pump can withstand a temperature of +90 °C. This French unit costs about 400 - 420 USD. sewer pumps Wilo DrainLift TMP 32-0.5EM And SFA SaniVite Silence are also designed for water with a temperature of +75 ° C and cost 350 - 400 USD.

• Submersible sewage pump.

Such pumps are also called fecal submersible pumps, and they are fundamentally different from all those described above. Submersible pumps are installed in a well or tank into which wastewater flows from the entire country house. In principle, it can be not only a country house, it can be a cafe, restaurant, club or other facility that has an autonomous sewage system. The submersible fecal pump is equipped with a powerful motor and cutting mechanism, which is able to grind not only feces and toilet paper, but also cloth towels, rubber gloves, feminine hygiene products, terry towels and other large items. The only thing it will not cope with is stones and metal objects, which must be avoided from falling into drains.

After crushing foreign inclusions, wastewater is pumped into a septic tank, where it is cleaned. Submersible sewage pumps are manufactured by companies such as Grundfos, Wilo, KSB, FLYGT, HOMA and GORMAN-RUPP. The body of such a pump and grinder are usually made of cast iron or stainless steel. The pump itself can be equipped with a float, signaling that the level of wastewater has reached a mark, after which the pump should turn on for pumping. In the same way, the float controls the shutdown of the unit.

For fecal sewer pumps, the price depends on the power of the unit. For example, a powerful pump PEDROLLO MS 30/50 + remote control QES300 with a power of 2200 W costs almost 1000 USD, its analogue is simpler with a power of only 750 W PEDROLLO MCM 10/50 costs already 350 USD Also, the price is affected by the reputation and requests of the manufacturer. For example, a Ukrainian-made fecal pump DNIPRO-M will cost only 60 - 70 USD, although it has a power of 2750 watts.

In addition to the above, household sewer pumps include semi-submersible pumps and pumps that are dry-mounted. Also popular are KNS(sewage pumping stations), which are a ready-made wastewater tank in which a fecal pump of the required capacity is already installed. When choosing a pump for your home, be sure to familiarize yourself with the characteristics of the unit and recommendations for its use, but rather consult with a specialist.

Industrial sewer pumps

Industrial sewage pumps are used in multi-storey buildings, remote sites, cottage communities and enterprises for pumping wastewater into the city or autonomous sewer. The same pumps are installed at pumping stations and wastewater treatment plants. Conventionally, industrial pumps can be divided into the following groups:

Submersible pumps are operated immersed in water at all times. Since the unit is in an aggressive environment, its body and parts are completely made in accordance with the requirements for stability. The popularity of these types of pumps is due to the fact that they are used directly inside the sewer pumping station and do not require a special place for placement, as well as an additional pipeline.

It is also worth clarifying that submersible pumps are also suitable for a “dry” installation, only in this case it is necessary to properly organize the supply of pipes and backwater at the inlet pipe.

Such pumps are installed openly in the basements of high-rise buildings, as well as in sewage pumping stations of an industrial level. Their main difference is that the pump and motor are located separately and are connected by a coupling. With proper operation, cantilever pumps can last a long time without repair and breakdowns. If repair is necessary, it is easy to carry out, since the pump is in plain sight.

• Dry-installed self-priming sewage pump.

Such pumps are installed in a separate room at a specially equipped place inside the SPS (sewage pumping station). They have excellent characteristics, are easy to maintain, but are quite expensive, so they are rarely used at present.

When choosing an industrial sewage pump, it is extremely important to choose a model from a manufacturer that is able to provide specialists for installation, and then deal with the accompanying diagnostics, maintenance and repair.

Sewer pump installation

So, if there is a problem of the impossibility of moving wastewater by gravity, then there is nothing left but to install sewer pumps. We have already considered that the scope of their application is diverse and it is necessary to select a specific model for specific tasks.

To be able to install the toilet in a place convenient for you, without being tied to the location of the sewer riser, you must equip it with a sewage pump for the toilet. This applies not only to country houses, but also to apartments in which redevelopment has been completed, as well as premises in the basement.

What pumps can be used to connect to the toilet? Grundfos pumps models Sololift2 WC-1, Sololift2 WC-3, Sololift2 CWC-3(wall mounting), company pump Wilo DrainLift KH 32-0.4 EM, SFA model pumps SFA SaniTop Silence, SFA Sani Broyeur Silence, SFA SaniPRO XR Silence and others. These sewer pumps received the most flattering reviews. They are characterized as reliable and high-quality units.

Most toilet pumps have additional inlets to which you can connect sink drain, soul, bidet And urinal. Therefore, with the help of one pump, it is possible to ensure the removal of wastewater from an entire bathroom.

The easiest way to connect a sewage pump to a toilet is to install a toilet with a built-in pump. You can see how this is done in the video example.

A conventional sewer pump is installed behind the toilet no further than 40 cm from it.

Tips for Connecting a Sewage Pump to a Toilet:

• Pay attention to the diameter of the inlet pipe on the pump. It must match the outlet of the sewer drain pipe from the toilet (toilet outlet). If the diameter of these holes is different, then the installation will be incorrect.
• Read the instructions carefully before installing the sewage pump. Most often, it is equipped with all the necessary diagrams and recommendations, and the kit of the pump itself includes everything you need, up to the mounting screws.

• The first step is to insert connecting elbows or supply pipes into the inlet pipes.
• Then install the pump behind the toilet and fix it to the floor with screws. On the pump housing there are special cast ears with holes for such mounting.
• All pipes leading to the pump should be located with a slope of 3 cm by 1 m, ensuring the movement of wastewater by gravity.

• Then, a sewer pipe is connected to the outlet. What recommendations exist for its location are indicated in the photo example (dependence of pressure on the height and length of the pipeline).

• If the model of the sewer pump involves the removal of ventilation, then it is necessary to bring the ventilation duct above the ridge of the roof of the house. Although there are models with a carbon filter that ensure the absence of unpleasant odors in the house.
• The pump is connected to the mains through a 30 mA RCD. If the pump model comes with a ready-made plug, then it can be connected to a personal outlet, the cable to which must be run directly from the shield and RCD.
• All bends in the outlet and inlet pipes must be smooth.
• All piping connections must be made by soldering, welding or adhesive joints.
• If there is a need to drain wastewater in a vertical plane, then the vertical section of the outlet pipe must be made no further than 30 cm from the outlet of the pump. This will ensure normal pressure in the pipeline.

Please note that the toilet sewer pump must not be installed below floor level and in pits. Only next to the toilet, providing free access to the pump for maintenance and repair. To ensure that the water that the pump drains cannot return back, a check valve must be installed on the outlet pipe.

If the kitchen is planned install a dishwasher or washing machine, then the sewage pump must be selected resistant to high temperatures - up to +90 ° C. Suitable models: Grundfos Sololift2 C-3, Wilo DrainLift TMP 32-0.5EM And SFA SaniVite Silence. There are also more powerful models with a storage tank that can pump large volumes of wastewater from all the appliances in the kitchen.

You can install a sewage pump in the kitchen anywhere - in a closet under the sink, near the wall, in a closet or other convenient place. The main thing is to calculate everything so that all supply pipes are located with a sufficient slope (3 cm per 1 m) and do not have too much length. Otherwise, you will have to use several pumps.

Tips for Connecting a Kitchen Sewage Pump:

• If several pressure sewer pumps are used, they must have individual entrances to a common riser or main. The connection of pipes draining from the pumps into one is prohibited.
• If the outlet pipe from the pump has a long horizontal section, which is located below the level of the pump, then at the highest point it is necessary to install a valve (0.7 bar) that provides air access after the pump is turned off.
• If the pump model requires air cooling of the electrical circuit, then the pump will come with a special plastic tube that must be inserted into a special hole in the housing and brought vertically 50 - 80 cm above the pump. This will ensure the flow of air to cool the electrical circuits.

The outlet pipe from the pump must be made of hard plastic, such as polypropylene or polyethylene. Flexible corrugation in a pressure sewer cannot be used.

A fecal pump is used to process and pump wastewater into a septic tank. In cases where the flow of sewage from the house directly into the septic tank is not possible, for example, if it is far away, a prefabricated well is equipped next to the house, into which a sewage pump is installed. Drains from all over the house flow into the collection well, here the pump crushes them and pumps them further - into the septic tank for purification.

Also, the installation of a prefabricated well is possible if the central sewerage system is located at a distance and it is necessary to create a pressure that can direct wastewater directly into it.

The most convenient option - purchase and installation KNS (Sewer Pumping Station). It is a plastic container of various sizes and shapes, the material of which is resistant to aggressive environments. The container is completely sealed and there is practically no risk of leakage. A fecal pump is installed inside the tank, which processes garbage and sewage and pumps them further. Most of these pumps are submersible.

Under the tank, it is necessary to dig a pit of the required depth. Only the hatch should remain on top. The bottom of the pit should be tamped, and then a concrete pad should be arranged on top. To do this, crushed stone, sand are added, and then concrete is poured with a layer of 10 - 15 cm. After the concrete has hardened - in about a week - a sewer station can be installed. It must be lowered carefully. KNS should stand strictly in level - vertically.

The pump is connected strictly according to the instructions. For this, a cable and a chain are provided for lowering and raising the pump. The discharge pipeline must be of high quality by soldering or welding.

Then the KNS tank must be filled with water, this will make it possible to sprinkle around the tank. As the tank is filled with water, the outside of the KNS wall can be sprinkled with sand to the very top. The last 15 - 20 cm can be laid sod. After fixing the sewage pumping station in the pit, the water can be drained.

Installing a sewer pump with your own hands is not a difficult task, but only if you strictly follow the instructions and do not compromise. For example, you cannot install a sewage pump for a toilet bowl in a collection well or connect a pump with a temperature limit of +35 ° C to a washing machine. Detailed instructions are provided directly for connecting the pump. If suddenly you cannot figure it out on your own, do not risk it, seek help from professionals.