Determination of the ventilation pipe and the use of PE water supply fittings precautions

1, ventilation pipe diameter should be in accordance with the sewage pipe drainage capacity and the length of the pipeline to be sure, ordinary should not be less than half of the drainage pipe.PE water supply pipe fittings

2, the length of the ventilation pipe in more than 50m, Taizhou electrofusion pipe fittings diameter should be different from the PE pipe fittings diameter.

3, two and more than two sewage risers at the same time with a ventilation riser connected to a sewage riser should be a riser according to the affirmation of the ventilation riser pipe diameter, and shall not be smaller than a riser pipe diameter.

4, connected to the ventilation pipe should not be smaller than the ventilation riser diameter.

5, when two or more than two sewage risers of the vent pipe will be adjoined, the sectional area of the vent pipe should be a vent pipe cross sectional area plus other vent pipe cross sectional area of the sum of 0.25 times.

6, to the upper part of the pipe fittings to reach the top of the pipe diameter can be different from the sewage riser diameter, but in the coldest month the average temperature is lower than -13 ℃ in the region, Zhejiang electrofusion fittings should be in the indoor flat roof or ceiling below 0.3m will be enlarged to the diameter of the pipe level.

7, the drainage system to take hard polyvinyl chloride pipe when the ventilation pipe diameter is determined.

(1) ventilation pipe diameter should be suitable for the requirements.

(2) two and more than two sewage risers at the same time with a ventilation riser connected to a sewage riser should be a sewage riser to determine the diameter of the ventilation riser, and the diameter of the pipe should not be smaller than any other sewage riser pipe diameter.

(3) connected to the ventilation pipe when taking H pipe, can be set up in layers. Ningbo PE water supply pipe fittings H pipe and ventilation risers should be beyond the point of adjoining across the upper edge of the sanitary appliances 0.15m.

(4) when the paste sewage riser and paste wastewater riser apply a ventilation riser, and take H pipe as the adjoining pipe fittings, H pipe can be staggered layer separated from the paste sewage riser and wastewater riser distance adjoining. However, following the point of connection of living sewage cross-branch pipe should be equipped with connecting vent pipe.