Color Aluminum Rainwater Pipe Installation Requirements

1. Pipeline laying should comply with design and specification requirements. The rainwater vertical pipes should be equipped with inspection ports according to design requirements, with the recommended distance from the ground being 1 meter. When using high-density polyethylene (HDPE) pipes, the spacing of the larger inspection ports should not exceed 30 meters; rainwater pipes should be installed at the designated positions as per the design; the connection between the connecting pipe and the suspended pipe should be done using a 45° tee; the connections between the suspended pipe and the vertical pipe, and the vertical pipe and the discharge pipe, should be made with two 45-degree bends or 90-degree bends with a radius not less than 4D.

When high-density polyethylene (HDPE) piping passes through walls, floors, or areas requiring fire protection, fire rings, fire-resistant tapes, or fire sleeves should be installed as per design specifications; when rainwater pipes pass through walls and floors, metal or plastic sleeves should be set up. The top of the sleeve within the floor should be 20mm above the finished ground level, and the bottom should be flush with the floor bottom. The ends of the sleeve within the wall should be level with the finish surface. The gaps between the sleeve and the pipe should be filled with flame-retardant dense materials; temporary sealing measures should be taken for the open ends of the pipes and rain gutters during installation.

2. Gutter Installations: The inlet of the gutter should be installed horizontally; the height of the inlet should allow for all rainwater within the gutter to be drained through the gutter; the installation should follow the manufacturer's instructions and J sequence; during roof structure construction, it is necessary to coordinate with the civil engineering work to reserve holes suitable for the installation of gutters; gutters installed in steel or stainless steel gutters (eaves) can be connected using argon arc welding or other methods that ensure waterproofing requirements; after the roof waterproofing work is completed, the rainwater pipes are confirmed to be clear, and the sealant in the short pipe is cleaned, then install devices such as straighteners and deflectors; after the gutter is installed, the junction between its edge and the roof should be tight and leak-proof.

3. Pipeline installation should comply with specification requirements, such as: prefabricated sections of high-density polyethylene (HDPE) should not exceed 10 meters; connections between prefabricated sections should be made using electric fusion, hot fusion butt welding, or flange connections; electric fusion connections are recommended for suspended HDPE horizontal pipelines, and they should be installed in coordination with fixed components.

4. After the installation of the color aluminum rainwater pipes is completed, a system sealing performance acceptance should be conducted to meet the design and specification requirements. Block the rainwater hopper and fill the roof or drainage channel with water. The water level should submerge the rainwater barrel. After 1 hour, there should be no leakage around the rainwater barrel on the surrounding roof. For rainwater pipes installed indoors, the filling test should be conducted using either the whole-section method or the section-by-section method, depending on the pipe material and building height. The water level should reach the mouth of the rainwater hopper at the top of each vertical pipe. After 1 hour of filling test, there should be no signs of leakage in the pipes and their connections.