industrial, containing large amounts of suspended solids

[zihadhosenjm40]

In accordance with the requirements of SNiP 2.04.01-85* "Internal water supply and sewerage of buildings", the size of such a hatch is recommended to be 30x40 cm. But this size can be different if unimpeded access to the inspection is ensured.
Cleanings are installed on horizontal sections at the beginning of sections (in the direction of wastewater movement), as well as when changing the direction of the pipeline, if cleaning it without installing a cleaning may be difficult.
The cleaning can be installed in the form of a special fitting, but any tee or elbow with a plug at the end can also be used as it.
Tees are often used as cleanings at the points where sinks, washbasins or other plumbing fixtures are connected. In this case, to remove the blockage from the sewer pipe, the corrugated pipe coming from the sink, which is connected higher up the drain, is removed, and a plumbing cable is inserted into the freed hole.

Table 6 of SNiP 2.04.01-85* “Internal water supply and macedonia mobile database of buildings” specifies the following regulatory distances between inspections and cleanings depending on the nature of the drains and the diameters of the pipelines:

Pipeline diameter, mm

Distance, m, between inspections and cleanings
depending on the type of wastewater

Type of cleaning device

industrial unpolluted
and drains

household and industrial, close to them


Revision

Cleaning

Revision

Cleaning

200 and more

Revision

Notes: 1. Instead of inspection of suspended sewer lines laid under the ceiling, it is necessary to provide for the installation of cleanings that are led to the floor above with a hatch in the floor or openly, depending on the purpose of the room.

2. Inspection and cleaning holes must be installed in places convenient for their maintenance.