Connecting the house to the water supply
For connecting the interior water distribution installations to the public network of drinking water there are provided pipeline connections that are called branches and devices for recording the water consumption, called water meters. The pipe connection (branch pipe) is provided perpendicular to the front of the building so that its length to be as small as possible, and the break through the foundations from the entrance of the building to be easier.
Branching sizes can be with diameters from 32-40 mm up to 110 mm, depending on the water requirements of the building, and it is made of PE-HD pipe (high density). Any branching is provided with a concession valve (tap) for underground assembling, with which the water can be stopped in case of branching faults. This valve is handled only by the water distribution company or by the owner in some cases of damage.
“In most cases the water supply of a house will be made through a polyethylene branching of high density PE100 Ø 40mm connected to the existing water meter from the inside of the house, which is connected to the street water network. Water networks must be placed under the frost depth (h = 0.95 m, medium, depending on the area where you live).
Measuring of the water consumption is done by the consumer through a cold water meter DN 20 mm installed into the water meter house.
The water meter house can be a circular or a rectangular type, made from reinforced concrete, equipped with frame with cast iron lid or non-carriageable depending on what you desire.
“At the execution of external water supply the specific measures of working safety and PSI will strictly be respected, complying with the rules and regulations in force.
The branching pipe is made by the company for the distribution of water in the area or by authorized companies.
Connecting the branching pipelines to the public pipeline is done with help of outlets with or without collar.
When you use outlets without collar, the connection is made at the top of public pipeline, after the pressure was withdrawn from it, and the operations that occur succeed as follows:
-the public pipe is drilled in a vertical way to match the diameter of the connection, with the aid of a drilling device with screw tap and back drills;
-the scroll is cut in the hole by using taps;
-then the connecting piece is screwed, which may be a brass Dutch with glued connection;
-the pipe is glued to the glued connection pipe, in the known manner;
-the Dutch nut is screwed, the sealing being made with a special rubber seal.
The outlet with collar is a piece in the form of attack, made of iron or polyethylene, which is fixed on the public pipeline with a collar made of flat or square steel; the collar has two threaded ends, such as fixing the pipe is done by tightening the nuts. Sealing the outlet on the pipe is made with rubber gasket with strip insertions.
The outlet with collar is provided with a clamp for the junction with the branching pipe.
“To execute the branching using the outlet with collar the public water pipe is drilled firstly as in the case of the outlet without collar. Then the outlet with collar is installed, placing it to match its hole right into the executed hole. Into the plug hole, which is equipped with interior threads, the connecting piece is screwed, which is the same as in the case of the outlet without collar. Connection of the branching pipe is executed the same like in the outlet.
The outlet with collar allows the connection of the branch when the public pipeline is in operation (under pressure). In this case the connection is made in one of the sides of the public pipeline, drilling this pipeline is performed after the outlet with collar was installed. For this purpose, to the outlet with collar is connected a plug valve, whose orifice for passing is round. As it is known, the plug valve may close or fully open the pipe that it is installed on through a rotation of only 90 degrees.
After this, by this valve it is fixed a special machine for drilling, composed of a key frame with a screw and a borer operated by a lever with ratchet (back drill).
After the device has been fixed to the valve, the plug valve is set on the open position and the borer is inserted through the orifice of passing of the valve, then being pushed by using the key frame with screw up to the pipe. Pulling the ratchet lever, the borer is rotated until it perforates the pipe. At this moment, the borer is removed and the plug valve is closed, for the water from public pipe not to go outside. Then the drilling device is disassembled and in its place the branching pipe is assembled to the plug valve.
The water house installation
The water meter and those two valves are installed in the water house near the wall, parallel to the wall. From each of valves to the water house wall there must be a distance of at least 20 cm and under the counter a support console is installed for, because of its weight, not to pull down and break the connections.
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