Plastic caisson K series from TOPOL-ECO

Technical plastic cap for the well (caisson) "TOPOL-ECO" series "K" is designed to provide protection against freezing, flooding ground, atmospheric and flood waters, wells of the water supply system for individual houses, cottages, summer cottages and other objects low-rise buildings.

The caisson also serves for comfortable placement, maintenance and repair of the associated equipment for the arrangement of the well and the water supply system of the house.

The caisson can be used at any ground water level.

The presence of a caisson eliminates unwanted vibrations and noise during equipment operation. Inside the caisson, you can make wiring for different consumers, remove the pipes from the well and direct them into the house below the level of soil freezing.

Device and principle of operation

The product (caisson) is a serial capacitive equipment of full factory production. The material of the product is polypropylene, which does not corrode, rot and has good mechanical properties. This eliminates the need for preventive maintenance to protect the housing from corrosion and ensures a long service life.

The caisson is installed above the casing of a water well (sandy, artesian, etc.) and is (see. Fig. 1) a buried sealed cylindrical tank, in which the associated equipment is located (the wellhead (sleeve), pipelines, shut-off and control valves, filters, pumping station, electric cable, pump automation - pressure switch, membrane tank and etc.). Only the coupling is optionally supplied with the caisson.

The caisson is equipped with a neck with a water-tight cover and a ladder for repair and maintenance work, well maintenance and related equipment.

To protect the internal equipment of the product from theft, it is provided (optionally) to install a set of fasteners with a lock on the cover. The caisson has internal and external stiffeners, there is a rigid polygonal base (as a lug), which gives strength to the structure of the caisson, prevents it from being squeezed and surfacing.

Downhole head (collar), which has a tight elastic connection with the well casing, prevents entry into the well surface groundwater, debris, insects, rodents, etc., increasing the reliability of the submersible pump installation and simplifying it service.

Technical data

The product (caisson) is produced in various models having the same design, but differing in overall dimensions, diameter and location of the coupling, and installation depth.

Caissons have different neck diameters (700 mm - models K-1 and K-2, 800 mm - models K-3, K-4) and height ("K" - 2100 mm, "K-Ud" - 2350 mm, " K-Long "- 2600 mm).

When the product is manufactured at the factory, there are no holes for the well casing in the bottom of the product, holes in the wall for input / output of pipelines and electric cables. The holes for the casing, pipelines and electric cables are to be made locally during the installation of the product. The caisson uses a coupling of various diameters (depending on the diameter of the well casing)

Technical characteristics of couplings:

Coupling 1 - for casing diameter 106-114mm, coupling inlet 150mm

Coupling 2 - for casing diameter 120-133mm, coupling inlet 185mm

Coupling 3 - for casing pipe diameter 140-150mm, coupling inlet 185mm

Variants of possible location of the coupling in the coupling caisson:

Installation procedure (for types of soil, sand, loam, clay)

1. Mark the foundation pit for the product according to the wiring diagram for the corresponding model, taking into account the eccentricity of the hole in the bottom of the product under the head of the well (coupling) and its position (see. Fig. 2), taking into account the direction of the drainage main. A cylindrical pit is recommended, which will reduce the amount of excavation during the installation of the caisson. The pit diameter should have overall dimensions 300 mm larger than the caisson diameter on each side. Check the markings are correct.

2. Mark and fix the boundaries of soil dumps, protect the pit from storm water ingress, install inventory pit fences;

3. Dig out the pit manually or mechanically to the required depth, with constant monitoring of the verticality of the walls. The walls of the pit must have slopes that prevent soil collapse. The slope angle is taken depending on the type of soil. If necessary, reinforce the walls of the pit with formwork.

4. Backfill and compact a sand cushion with a thickness of 150 mm with the output of its surface under the zero mark using a building level.

5. Make a hole in the bottom of the product for entering the well casing. Cut the casing pipe so that it protrudes from the bottom of the product by no more than 500 mm.

6. Lower the product onto the prepared base (sand cushion) using the mounting loops on the casing pipe. Center the product with respect to the side walls of the pit and the well casing, align vertically and horizontally using a building level.

7. Fill the gaps between the walls of the hole of the product and the casing pipe with cement mortar.

8. Seal the entry of the casing into the product using a well head (coupling). Before installing the coupling, it must first be disassembled. To do this, unscrew all bolted connections, remove the top flange and the O-ring.

To achieve better sealing, it is recommended to clean the surface of the inlet casing pipe with coarse sandpaper and coat the joints with sealant. Further, on the casing pipe, an O-ring is mounted, as well as the counter flange of the sealed casing coupling, and all bolted joints are evenly tightened.

9. Insert main water pipes and electric cable into the product. To do this, it is necessary to prepare the appropriate holes, focusing on the water supply trench adjacent to the product, enter / remove the pipeline with the help of pressure fittings and compression fittings, as well as for the purpose of year-round use of the water supply system, pressure pipelines from the caisson to the object are recommended to be laid at a depth below the design level freezing. If the pipelines are laid in the zone of freezing of soils, it is necessary to use insulation elements (heating cable, pipe insulation).

10. Back-sprinkle the product in layers - with sand for the type of soil, sand or loam, or with a mixture of sand and cement in a ratio of 5: 1 for the type of soil, clay, as well as with “quicksand” soil. The sand or mixture is placed up to the neck cover of the product. The thickness of each layer is 300 mm, sprinkling is performed with the obligatory pouring of water and compaction of each layer.

11. When developing a pit with a slope device, backfill the pit according to clause 10, with simultaneous filling to the ground surface. The backfill must be free of debris, large stones and other solid impurities.

12. Note: For heavy types of soil and quicksand, the caisson is mounted on a concrete slab (base) with the tank anchored.

13. Installation of related internal equipment (pipelines, shut-off and control valves, filters, pumping station, electric cable, pump automation, diaphragm tank, etc.) is carried out after backfilling the caisson and installing the inlet / outlet engineering networks.