Drain ladder with dry seal. Brief information about shower drains. What to consider when choosing a ladder
Floor systems water drains are very popular because they allow the use of shower cabins without purchasing trays. The water flows directly onto the floor, from there it goes into the sewer. The drainage of water into the sewer pipes is provided by drains for showers, mounted directly in the floor.
The principle of operation of the drain ladder
Plumbing fixtures such as sinks, bathtubs or showers are connected to the sewer; no other way to remove used water in apartments has yet been invented. A pipe through which draining water is supplied to the socket sewer system, willy-nilly, turns out to be a conductor of unpleasant odors from the depths of the city sewer into the apartment atmosphere.
To prevent stench from entering the room, various seals are used. The classic solution to this problem is a siphon, the design of which allows you to create a water plug, called a water seal, which restrains the passage of gases from the sewer. But if, when draining water from a kitchen sink, a siphon of any proposed size is suitable, then for a shower stall it is not so simple, since the height of the siphon requires a certain amount of free space to accommodate it.
The functions of the ladder are simple and few:
- Collection of drained water;
- Delivery of collected waste liquid through a discharge (drain) pipe to the sewer;
- Filtration of wastewater from polluting components in order to prevent emergency blockages;
- Creating a barrier to the passage of foul-smelling gases from the sewer through the outlet (drain) pipe into the room.
The dimensions of the drains most often range from 70 to 120 cm. Since the outlet pipe must have a slight slope of about 3 degrees relative to the horizontal floor (see figure), to accommodate the drainage system, a margin of free space between the drainage area is required (then there is a shower floor) and concrete base under the floor about 8 - 20 cm.
For concrete floors of high-rise buildings, the option of recessing in the floor is categorically unacceptable, since installing a drain in the shower floor in this way means emergency weakening concrete floor over the head of the neighbor below. In this case, you have to build a small podium or raise the level of the bathroom floor. To raise the floor level it is enough concrete screed 4 cm thick.
If there is limited free space, which requires the installation of a siphon, drain ladders are installed to ensure the drainage of used water directly from horizontal surface premises. Depending on the degree of localization of the drain, the shower drain is located:
- On a small floor area in the form drainage channel or gutters;
- Exactly anywhere in the room.
Types of shower drains
Drainage gutters or channels
They have rectangular section, consist of a protective grille and a housing. The most preferred place to place them is at the entrance to the cabin or near the wall. The plumbing market offers:
- straight,
- curvilinear,
- angular shaped channels.
Grille designs incorporate numerous design concepts, such as illuminated shower gutters! Consumers clearly do not want simple rectangular channels to resemble street storm drains.
They work similarly to the channel drainage method, that is, sending wastewater through pipes into the sewer system. And the shapes of point drains are also diverse, that is:
- Square,
- Round,
- Triangular.
But if square and round drains are installed at any point on the floor, then corner options designed to mask the drainage area.
In the corner of the bathroom they are almost invisible, while due to the specific placement of square and round drains, it has become fashionable to install decorative grilles of the most expensive options. For example, the brass grille shown here, made to look like gold, will cost the customer 10 thousand rubles.
Design of drain for shower cabins
According to functional purpose, the ladder includes:
- Flush body made of stainless steel or plastic;
- A seal that serves as a barrier to stench from the sewer;
- A protective grille that allows you to decoratively adapt the shower drain to tiles and other flooring options in the bathroom;
- Pipeline.
This is important! It is necessary to be able to correctly determine the required wastewater flow. If a bathhouse requires a device with a passage of DN 100 mm, then for apartment conditions it is sufficient to install a drain of DN 50 mm.
Which shutter should you choose?
The type of seal used, or more precisely, the method of preventing the passage of odors towards the living space, is fundamental to the development of the design of drainage drain models. As already mentioned, just a small amount of water is enough, which plays the role of a water plug, and the task assigned to the water seal will be solved.
With constant use of the shower (meaning use at least once every one and a half to two weeks), its level remains unchanged, since it is replenished with each passage of the next batch of drains. 
Immediately about the disadvantages of the “wet water seal”
With occasional, irregular use of the shower stall, and, accordingly, the drainage system, sooner or later complete evaporation of the liquid from the valve will occur. It will begin gas attack» aggressive gas environment from the sewerage system, resulting in the appearance of unpleasant specific odors. A shower drain with a water seal is not able to withstand such periodic use, so it is not used in baths or utility rooms, which may not be visited for months.
Since the operation of a “wet water seal” is in some cases ineffective due to the drying out of the water plug, logic dictated the need to use, figuratively speaking, a dry water seal that does not depend on the presence of water in the siphon.
What does "dry shutter" mean?
The operation of shower drains with a dry seal is based on the return of the actuating elements to their original working (locking) state after the end of exposure to the flow of drainage. Here are some popular dry seal options:
- Membrane type, the actuator of which is an elastic membrane that opens when exposed to flow to allow liquid to pass into the sewer. When the flow dries up, the membrane will return to its original state, ensuring the tightness of the device;
- Pendulum type, equipped with a pendulum valve with one fixed point. Passing drains deflect the valve from its equilibrium position, and gravity forces return it to its original state.
- Float type, which is a symbiosis of dry and hydraulic valve designs. The float valve (ordinary balls play its role in homemade products) floats in the presence of liquid and does not interfere with the drainage of liquid. When the water evaporates, the float will fall into the nest and close the passage valve. At the next discharge, the structure will be filled with water, the ladder will begin to work as a water seal.
The use of the dry principle of operation ensures reliable operation of the entire drain system during its irregular operation, which provokes the evaporation of moisture from the hydraulic lock. Reliability and durability of operation will also be enhanced by stainless steel shower drains, which are absolutely indifferent to contact with the chemically aggressive water of our water supply systems.
To prevent unpleasant odors from the sewer from entering the premises, special structural elements. The simplest of them is a hydraulic or water seal. However, as practice shows, such a system does not always and not work effectively everywhere. Because in lately Increasingly common drains are equipped with a dry siphon. It has the same properties as a water seal, but does not have its disadvantages. Design features dry drain allows it to filter sewage, separate large elements, thereby preventing blockages and accidents. However, the main function is to prevent foul odors from entering the living space from the sewer system.
- 1 Types
- 2 How to choose
- 3 Installation
Species
If you analyze the market plumbing equipment, you can find several types of dry ladders:
- Membrane valves. Experts consider them to be the simplest in terms of design, but no less reliable. The main element is a spring-loaded membrane, which opens slightly due to the influence of water flow and removes waste. As soon as the water flow stops, the membrane closes and guarantees a tight seal.
- Pendulum gates. A similar drain, equipped with a dry siphon, has a valve with one fixation point. When the drain passes by it, the valve deviates from its axis, after which it returns to its original position due to the influence of gravity.
- Float valves. Some even manage to make them with my own hands. Essentially, a float ladder is a combination of a dry gate and a hydraulic gate design. It is a drain with a vertical outlet and a plastic valve built into it. If we are talking about own production, then use balls of the required size.
Float valves work according to the following principle. If there is a sufficient amount of water in the water seal, the ball floats and does not delay the drainage of wastewater. If there are long breaks in use, the water partially evaporates and the ball drops into a special slot. Due to this, the shutter is sealed. After draining, water re-enters the system, and the structure begins to work again as a water seal.
Dry drains have not yet gained the popularity they deserve due to their higher cost compared to standard solutions. Their work is based on the working elements used, which, due to their design, always tend to return to their original position after being displaced under the influence of waste flow.
How to choose
If you decide to purchase a drain equipped with a dry siphon, it is important to pay attention to the conditions under which it will be installed.
- First, determine how much sewer will flow through. Ordinary apartment it is enough that the nominal passage of the ladder is 50 millimeters, and if this public bath or shower, then 100 millimeters.
- Height of the device structure. A ladder with a horizontal outlet can be installed in fairly cramped conditions, since its height is about 7-10 centimeters. The vertical type of shutter is more demanding in this regard, since it requires at least 15 centimeters of free space for installation.
- Before purchasing a device, make sure that all its elements are in good working order. Ideally, you can test the functionality of the product.
- Only by foreseeing everything technical nuances You can pay attention to external aspects. The ladder grating is made of plastic, metal, with various shapes, and so on. The choice depends directly on your wishes and requirements.
Installation
If you have already encountered the installation of a hydraulic valve, then a drain equipped with a dry siphon will not cause problems during installation. This is because there are no fundamental differences.
Important condition proper installation is to provide high-quality waterproofing for the system. To achieve this, use modern materials isolation. Under certain conditions and needs, sound insulation is also carried out, and the issue of insulation is not ignored.
The device should be installed in such a way that the ladder grate is flush with finishing floor. Due to this, you will not encounter discomfort during operation, and you will not hit it while walking around the room.
As practice shows, a drain of the dry principle guarantees trouble-free and reliable operation of the sewerage system. It becomes especially relevant when evaporation from the water seal occurs due to infrequent use or other factors causing water drainage.
Of course, it is not recommended to do the installation yourself without the appropriate experience and knowledge. To save energy and your own nerves, it is better to turn to specialists with the necessary qualifications. They will quickly carry out installation, provide truly reliable and effective work systems. You will be able to fully appreciate the advantages of this type of ladder.
The drain HL 310 NPr is used in interior spaces for drainage of wastewater from the floor level. The drain is equipped with a 50 mm water seal (“dry” siphon Primus), which does not allow sewer odors into the room when it dries out. The permissible load on the ladder is a maximum of 300 kg. Throughput - 0.5 l/s. Drain temperature - no more than 85°C (short-term drainage of water with a temperature of up to 100°C is possible, but for the drain volume - 100-200 liters). Outlet - vertical DN 50/ 75/ 110. Weight of the ladder HL 310 NPr - 0.7 kg.
The 310NPr drain has: a polypropylene extension with a 123x123 mm subframe, into which a 115x115 mm stainless steel grid, “dry siphon,” is inserted. The body is made of polyethylene with a “plate” for catching waterproofing.
The price of the ladder HL 310 NPr is 2237 rubles.
Installation features of the HL 310NPr drain: The height of the extension element of the drain is adjustable from 12 to 70 mm (it is cut to the height of the screed). You cannot cut the body! Because this will result in reduced throughput. If it is necessary to increase the height of the ladder, HL extensions (340 N and 85 N) are used. If the drain is installed in a gap in the waterproofing, then the rubber sealing ring is not placed on the extension element. The absence of a ring allows water that gets on the waterproofing to flow freely into the sewer through special channels in the extension element and the drain body. If used as waterproofing sheet material type - bitumen sheet, EPDM or PVC membrane etc., then for a hermetically sealed connection of the waterproofing with the drain body, it is necessary to use a stainless steel flange HL83.0 (for EPDM/PVC membrane) or HL83.H (for bitumen sheet). Flanges are not included in the delivery set and must be ordered separately.
How does the Primus siphon work?
Siphon while draining water The water seal is drying out Siphon in a “dry” state
1. Siphon body
2. Float
3. Air in the float body
4. Water (water seal)
Components of the HL 310 NPr drain:
|
|
grille HL 037Pr.1E |
|
|
Mounting plug HL 037N.0E |
Add site to bookmarks
- Species
- Choice
- Installation
- Finishing
- Repair
- Installation
- Device
- Cleaning
How to choose and install a sewer drain?
Today, many people prefer to implement their ideas for organizing a bathroom instead of installing standard shower cabins. In accessories and finishing materials there is no shortage. If you do without a pallet, you can significantly increase usable area and create your own shower stall design. In order for all these advantages to “earn”, you need to know how to install a floor drain. Without the right one, there is nothing to think about the comfortable use of the bathroom.
Correct installation drain ladder will help avoid flooding your neighbors and damaging your bathroom renovation.
What types of ladders are there?
The material used can vary, and these products can be metal, aluminum, plastic, cast iron, or a combination of metal and plastic. The shape of the ladders also varies, but the most common are round, square and rectangular. The height of the products varies from 75 to 180 mm depending on the model. They are all similar in design and consist of the following elements:
- Front panel (grill). May have different sizes and the shape of the drain holes.
- Siphon. Designed to prevent the penetration of odors from the sewer system. It can be made in several versions: water seal, dry seal, mechanical seal. The latter is installed on outdoors or in non-residential premises.
- Seal.
- Elements for sealing (clamping).
- Frame.
Structural features of ladders
- Horizontal. The most commonly used type, since its installation is possible on any floor, regardless of the number of floors.
- Vertical. They differ significantly more throughput, but require special installation conditions.
Return to contents
What to consider when choosing a ladder?
It is important to choose the right drain, since after installation it will be difficult to dismantle it: you will need to remove flooring and a screed.
Floor drain structure with combined shutter system.
The material used is not that important; everyone chooses what they like best. Nowadays, plastic drains are the most popular, since they have the most interesting design, there are different color combinations. You can safely buy metal products; they are durable and not subject to corrosion.
You need to decide on the size of the ladder. For showers, they are suitable for medium-sized showers with good flow capacity. If the drain is needed in a drainage or other system, then the size is determined based on the expected volume of drainage. An important point is the configuration of the drainage system in the place where the drain will be installed. For example, the design of domestic sewer systems allows you to connect up to 3 outlets (pipes from a sink, sink, etc.). The direction and diameter of the outlet is very important, this point must be taken into account.
Optimal characteristics
Corner drains have a PURUS Nood mechanical water seal.
- throughput of at least 1.2 l/sec;
- built-in siphon;
- if the house has a plastic sewer pipeline with a cross-section of 110 mm, then the drain must have bushings of the same diameter for vertical drainage or 50 mm for horizontal drainage;
- the grid must be designed for load class A;
- the design of the ladder must ensure adjustment of its installation depth in accordance with the level of the floor covering;
- equipped with seals;
- It is advisable to have installation instructions.
Return to contents
Which drain is better: with a dry or hydraulic seal?
Until recently, manufacturers produced products only with hydraulic valve. What is he? This is a tube bent at a certain angle that contains liquid. This is precisely the obstacle that odors coming from the sewer system cannot overcome. Caring for such a shutter is simple: just periodically spill it with water.
What is the disadvantage of this design? The fact is that the shower valve dries out when used infrequently: unpleasant odors are starting to cause inconvenience. is also possible for other reasons: design errors, elevated temperature indoor air, using a “warm floor” system.
With the advent of drains equipped with a dry seal on the market, many problems resolved themselves, and these designs became very popular. Such products are also convenient in that they can work either independently or in combination with a water seal.
Return to contents
How is the shutter at the ladder arranged?
Return to contents
Membrane
The valve is equipped with a membrane to which a spring is attached. When water is drained, the membrane opens and lets it through, and when the flow ends, it closes the inlet into the waste pipe under the action of a spring.
Return to contents
Float
On the surface of the water in the water seal tube there is a kind of float, which, as the water flow decreases, falls and blocks the passage hole.
Return to contents
Pendulum
Its work is based on the operating principle gravitational force. Under her influence mechanical device the valve always tends to take a position in which it blocks the pipe.
Return to contents
Installation of a sewer drain
Installation of products with dry and water seals is practically no different. The basic rule: the floor should be made in such a way as to ensure the proper level of slope to the drain for unhindered drainage of water into the riser. Therefore, installing a drain funnel often involves raising the floor level or dismantling the existing floor covering.
Basic installation rules:
The material of manufacture is not important, the main thing is that it is moisture resistant.
- the facing grid of the ladder must be flush with the surface of the floor covering;
- finishing begins with laying tiles from the ladder;
- seams between tiles should not exceed 2 mm;
- the grout used is moisture resistant;
- The floor surface must provide a slope for water drainage.
Materials you will need:
- cement;
- sand (sifted);
- waterproofing membrane;
- warmth and soundproofing material(foam is often used);
- mastic or adhesive composition for laying tiles;
- tiles that provide an anti-slip floor surface (rough).
A “dry drain” is a siphon for drains in shower rooms and other rooms where water is used. Serves to prevent sewer gases from entering the room.
Unlike a conventional siphon with a water lock, a dry drain can perform its functions during long breaks in the use of water.
That is, even in the toilet, after a couple of months of non-use, the water evaporates and air from the sewer begins to flow into the apartment. Which of course is bad. We have the same thing with other siphons with a water seal.
What can be done with the toilet and siphons during a long absence - read here.
The dry drain is designed in such a way that sewer gases are cut off not by a water lock, but by plastic or metal curtains.
There are also dry ladders with a float. In the absence of water, the float sits on the seat and blocks the air supply. But this option is not very good -
if there is excess pressure in the sewer (and this sometimes happens), the gas will be able to lift the float and penetrate into the room.
Water discharge from ladders can be vertical or horizontal. Horizontal ones are more often used. In this case, it is necessary to ensure sufficient deflection sewer pipe, starting from the ladder itself.
Let me remind you of the SNiP requirements for pipes diameter 50 mm - pipe slope 3cm/1m. When laying pipes, we try to avoid straight, and even more so sharp, corners.
If the drain is installed in the floor, then it is very important Right make a slope of the floor towards the ladder. How to do this is described here.
Stanislav Plitochkin was with you. Let me help you save SVDN©!
2 comments
Good day, Lucia Mikhailovna! The best thing I can advise you is to take a photo of the ladder on your phone and show it to the seller at construction market. Most likely you will be offered to buy the entire ladder, because I have never heard of them being sold in parts.
If three or four sellers tell you so, then you have no other choice - you’ll have to buy. But there is a chance for a positive outcome, so try it!
Good afternoon, Stanislav! Help me please! I have a steel drain installed in my shower. But the grate and something that should block the gases from the sewer are missing. I can’t decide which component part I should buy, what is the name of this component? Or do I need to change the whole thing and buy it assembled? Could you advise me via WhatsApp? My number is 89256260038. Sincerely, Lyutsia Mikhailovna, pensioner.
