The bottom of the trenches tamped and smoothed with a mixture of dry limestone gravel with coarse sand. Then laid PEX plumbing tubing. The minimum slope plumbing on the building regulations is 0,002 (2 mm to 1 running. M) in clay soils, and 0,003 (3 mm at 1 running. M) in the sand. In practice, for a good flow of water do slope 0,005-0,01 (5-10 mm in 1 running. M). To better penetrate the moisture PEX plumbing tubing, they sprinkle permeable materials. Shortcrust produce layers. Closest to the drain is washed gravel or gravel with a grain size of not more than 16mm. On top of the geotextile fabric separating this layer of sand with a particle size 0,5-10 mm. Thickness varies on average between 100 to 300 mm (less permeable than the surrounding soil, the thicker filling). Above previously excavated soil is placed.
To monitor the work of draining and cleaning of PEX plumbing tubing arrange viewing, as well as rotary wells. Most of them are made of concrete or reinforced concrete rings. Collected PEX plumbing tubing moisture enters the water intake well. His dig at the lowest point of relief, taking into account the topography of the site. Water can accumulate within a certain level, which depends on the depth of drains and the way of further removal of moisture. This water spending for irrigation, or it is discharged into the nearest ditch. Another option: groundwater and surface water can be directed to a special saturation well, having a depth of not less than 3m. If necessary, increase the capacity of the drains in the trench can put a combination of several PEX plumbing tubing of various diameters.
The quality of the drainage system depends primarily on the correctness and accuracy of its installation. The bottom of the excavated trenches tamped and fall asleep with a layer of crushed stone or gravel thickness of not less than 5 cm, on which he laid the tubing. This PEX plumbing layer is planned with a constant slope: in clay soils it should be at least 2mm/pog.m, in sandy 3mm/pog.m. In reality, for a good flow of water needed deviation of 5-10 mm. 1 running. m tubing. The cut in the size of the drains connect to each other movable PEX couplings, PEX tees, PEX elbows and other fittings.
After the installation and performance testing of tubing asleep PEX materials. Closer to the drain poured a layer of washed gravel or gravel with a grain size of not more than 16 mm. On top of the geotextile fabric stelyut separating it from the layer of sand fraction 0,5-1 mm. Depending on the permeability of the surrounding soil layer thickness ranges from 10 to 30 cm – the lower the permeability, the skinny back filling. Back-fill drains should be carried out very carefully so as not to disrupt the connections and does not change the slope of tubing. Well, the top layer of plumbing cover previously excavated soil from which the pre-remove stones. Often, to improve the collection of water instead of land completely fill the trench permeable soil and covered with grass.
Depth of laying PEX plumbing tubing depends on the level of groundwater, and in addition determined by the depth of frozen soil, the degree of penetration foundations of a house and several other parameters. In any case, the drains have not less than 80 cm from the surface. Water is allocated by gravity due to bias or force the pump into the overall PEX ditch, street ditch, ravine, decorative pond, PEX plumbing pit or storm plumbings.