Slope for the catchment system and the more both parameters are, the better. After all, the steeper the angle of the slope, the less likely it is to collect water stagnant in the depressions, inhabited by colonies of harmful microorganisms. Therefore, flat roofs, as well as slopes with an inclination angle of less than 10 degrees, are completely unsuitable for the role of the accumulating plane. And also - the higher the slope, the less likely it is to collect dirty water: after all, it simply does not have time to get dirty, moving at high speed from the roof to the storage. National Enviro Engineering is the best rainwater harvesting shaft manufacturer in Delhi.

Well, everything is clear with the area of the roofing surface - the larger it is, the higher the “performance” of this “rain trap”. After all, it is not for nothing that meteorologists consider the strength of the downpour in millimeters of precipitation that fell on a square meter of surface. That is, one can fairly assume that the larger the surface, the greater the volume of water will be "collected" from such a "field".

In addition, you need to pay special attention to the roofing material. After all, the ecological purity of the collected water depends on its characteristics.
That is why it is categorically not recommended to collect water from slate - it contains asbestos, or from copper tiles - its oxides are very poisonous. But from roofing iron and metal or ceramic tiles, you can collect technically clean water.

How to install a water collection system?

After choosing the “right” roof, you can proceed with the installation of the catchment system. In this case, the installation is carried out either from top to bottom (from the storm system to the drive), or in the opposite direction (first we mount the drive, building the storm system from this point).

Installation of the water collection system and both options involve the use of a container made of a material inert to water as a storage tank. Typically, this role is played by a polymer tank. Because it does not corrode and does not change the chemical properties of the accumulated liquid. In addition, such a tank can be installed either on the surface, or in the basement, or in a specially equipped pit. After all, it is not subject to corrosion, rotting, or destruction due to linear deformation provoked by the freezing of water (ice occupies a larger volume than liquid). National Enviro Engineering is the best rainwater harvesting shaft supplier in Delhi.

However, from an aesthetic point of view, the best option is to place the tank underground. Then he simply does not "irritate the eyes." Of course, the same result can be achieved by laying the container in the basement . But in this case, the tank will occupy part of the living space. In addition, it is cold in the ground, and in the cold - this is the best obstacle for the development of microflora and bacteria in the water. Therefore, water will never bloom in the ground, which cannot be said about the basement.

As a result, based on the above comments, the installation process of the catchment system should look like this:

• We dig a pit, utilizing part of the soil. Its volume will take 2 cubic capacity. Upon completion of earthworks, a sandy "cushion" up to 20 centimeters thick is laid on the bottom of the pit, leveling the bearing capacity of the soil.
• Next, a container is laid in the pit, which is placed on a sand cushion. After that, the space between the walls of the tank and the pit is filled with a dry sand-cement mixture.
• The next step is to insert two adapters into the body of the container. A storm pipe from the roof will pass through the first, and a pressure pipe from the submersible pump located in the tank will pass through the second.
• Accordingly, at the same stage, the pump itself and the vertical branch of the drainage system from the roof are mounted.
• After that, you can start installing horizontal gutters that transport rainwater to the neck of the vertical drain. Moreover, the slope of the gutter should go exactly to the neck.
• In the final, you need to fill the pit with ordinary sand, after taking care of the heat-insulating layer. In this role, you can use polystyrene foam boards laid on top and on the sides of the storage tank. Moreover, the plates are fixed in a ballast way, pressing down with soil.