These include repairs done in individual apartments on request of their owners and renovations carried out throughout the block.Usually in all apartments at the same time they are installed new water meters, corresponding to accepted standards. Plumbers make the readings of the counters and check whether they function correctly and that none of the residents of the block is not he cheat on by their counter just to get lower bills for water consumption. They deal with the replacement of defective meters with new ones, if you notice the occurrence of any irregularities in their operation.
The tasks of the executives of the association must also ensure the safety of residents of the block during the works.They can apply to do the second division of water, clean water and sewage network or even replacement of water meters in all areas.
Plastic Pipes are classified by their ring stiffness.
This means that good installation of pipes will result in good soil settlement.Further deflection will remain limited. For flexible pipes, the soil loading is distributed and supported by the surrounding soil.
Stresses and strains caused by the deflection of the pipe will occur within the pipe wall.However, the induced stresses will never exceed the allowed limit values. The thermoplastic behavior of the pipe material is such that the induced stresses are relaxing to a very low level. It has to be noted that induced strains are far below the allowable levels. This flexible behaviour means that the pipe will not fail. It will exhibit only more deflection while keeping its function without breaking. However, rigid pipes by their very nature are not flexible and will not follow ground movements.
They will bear all the ground loadings, whatever the soil settlement.
This means that when a rigid pipe is subject to excessive loading, it will reach the limit for stress values more quickly and break. It can therefore be concluded that the flexibility of plastic pipes is such that it offers an extra dimension of safety.Buried Pipes need flexibility9Źródło: https://en.wikipedia.org/wiki/Plastic_pipework#Flexibility.