Siphonic rainwater installation requirements:
(1) Pipe laying should comply with the design and specifications. The rainwater riser shall be set up according to the design requirements. The center of the inspection port shall be 1m away from the ground. When high-density polyethylene (HDPE) pipe is used, the maximum installation interval of the inspection port shall not exceed 30m; the rainwater pipe shall be installed according to the position specified by the design. The connection between the connecting pipe and the hanging pipe should be 45° three-way; the connection between the hanging pipe and the riser, the riser and the discharge pipe should use two 450 elbows or 900 elbows of R not less than 4D; high density poly When ethylene (HDPE) pipes pass through walls, floors or parts with fire protection requirements, fire-stop rings, fire-proof tapes or fire-proof casings shall be provided according to design requirements; metal or plastic casings shall be provided when rain pipes pass through walls and floors. The casing in the floor should be 20mm above the decorative floor and the bottom should be flush with the bottom of the floor. The casing in the wall shall be flush with the finish at both ends. The gap between the casing and the pipe shall be filled with a flame-retardant dense material; temporary sealing measures shall be taken for the opening of the pipe and the rainwater bucket during the installation process.
(2)rain water bucket
installation: the water inlet of the rainwater bucket should be installed horizontally; the height of the water inlet of the rainwater bucket should ensure that the rainwater in the gutter can be drained through the rainwater bucket; the rainwater bucket should be according to the product The requirements of the manual and the J sequence shall be installed; in the construction of the roof structure, the reserved holes required to meet the installation requirements of the rainwater bucket shall be reserved for the civil engineering construction; the rainwater bucket installed in the gutter (gutter) of the steel plate or stainless steel plate may be Use argon arc welding to connect with gutters (ditches) or other connection methods that ensure waterproofing requirements; when installing rainwater buckets, after the waterproof construction of the roof is completed, the rainwater pipes are cleared, and the sealing paste flowing into the short pipes is removed. Install the rectifier, shroud and other components; after the rain bucket is installed, the edge and the roof should be tightly connected.
(3) Pipe installation should meet the requirements of the specification. For example, the prefabricated pipe section of high density polyethylene (HDPE) should not exceed 10m. The connection between prefabricated pipe sections should be fused, hot melt butt or flanged; The fused high-density polyethylene (HDPE) horizontal pipe should be connected with a fused connection and fitted with a fixture.
(4)Siphon rainwater pipes
After installation, it should be done System sealing performance acceptance, and should meet the design and specification requirements. Block all rainwater buckets, fill the roof or gutters, the water level should be flooded with rainwater buckets. After 1 hour, there should be no leakage around the roof of the rainwater bucket; the rainwater pipeline installed indoors should be selected according to the height of the pipe and building height. The irrigation test may be carried out in sections or in sections, and the height of the irrigation must reach the upper hopper of each riser. After the irrigation test lasts for 1 hour, there should be no water seepage in the pipeline and all its connections.