During waterway reconstruction, the location of water points such as valves, faucets, showers and angle valves and the pipeline direction should be reasonably determined according to the actual situation of kitchens and bathrooms and the needs of customers.
2. Saw the slot with toothless, and the slot seat is straight.
When laying pipelines, the depth of wall trench should ensure that the concealed pipes are not exposed after patching in the wall and the ground, and horizontal wall trench should be avoided to prevent damage to the building structure.
3, PP-R pipe installation layout is reasonable, horizontal and vertical, the pipe shall not be close to the power supply, the shortest straight-line distance from the power supply is 200mm, and the pipe is closely connected with sanitary ware.
4. Ask customers for advice, try not to drill holes in the slots, fix the cork on the holes with copper wires, avoid slotting and laying pipes on the ground, and install the pipes on the ceiling and do heat preservation treatment, which will help to maintain and prevent the pipes in the ceiling from freezing cracking or condensation and dripping in the future.
5, waterway suppression test, must use cement mortar plugging.
6, waterway reconstruction must pay attention to the pipeline direction and reserved interface, angle valve position, height and size requirements.
The installation height of the toilet water supply pipe is generally 250mm from the ground to the center of the angle valve, and the reserved interface for hot and cold water in the washbasin is generally 350 ~ 450mm； from the ground; The height of shower valve is generally from the ground to the center line of reserved interface 1050mm.
7, hot and cold water pipe cloth, cloth pipe should be hot under the cold, left hot right cold.
The spacing between cold and hot horizontal lines shall be not less than 200mm, and the exposed cold and hot water pipes (including ceiling) shall be insulated.
8. Before the renovation and closure, the supervisor and the customer shall conduct water injection suppression test, with the suppression of 0.6Mpa, and the pressure drop shall not exceed 0.06Mpa in ten minutes.