Fastening System

The Weipike rainwater pipe mounting system consists of square steel guide rails running parallel to the pipes, pipe clamps connecting the pipes to the guide rails, hangers for securing the guide rails, and galvanized angle iron. 
The Weipike rainwater pipe mounting system is made of cold-rolled steel sheet, offering excellent compressive and tensile strength, as well as an attractive appearance and corrosion resistance. 
The Weipike rainwater pipe mounting system effectively absorbs vibrations caused by the formation of the siphon effect and displacements resulting from thermal expansion and contraction of the pipes, while also preventing pipe deformation caused by suspension loads.

The secondary suspension system is a new method for securing pipes in place. It uses fixed pipes and sliding pipes mounted on parallel square steel guide rails, without the use of expansion joints.

Expansion and deformation of the rainwater suspension pipes caused by temperature changes are distributed among the fixed supports (hangers), making the deformation imperceptible to the naked eye and enhancing the aesthetic appearance.

✔ The expansion stress generated by the axial expansion of the rainwater suspension pipes is transferred from the fixed supports (hangers) to the energy-dissipating suspension system, where it is dissipated, thus having no impact on the building’s structural integrity.

✔ Vibration loads on the rainwater suspension pipes during operation are transmitted through the fixed supports (hangers) to the energy-dissipating suspension system, where they are thoroughly dissipated using the rigidity of the suspension steel structure.

✔ This system effectively reduces the number of attachment points between the pipes and the roof, thereby minimizing damage to the roof.

✔ It is particularly well-suited for large-scale factory production and rapid on-site assembly, accelerating construction speed.

✔ It effectively improves construction precision and ensures engineering quality.

◎ Working Principle Of Weipike Siphon Drainage System

Weipike’s siphon system features a rainwater inlet bowl that has been meticulously calculated based on the Bernoulli equation and engineered with a specialized design. 
The Weipike siphon rainwater inlet bowl separates air from water, creating full-pipe flow conditions within the pipe even when the water level in front of the bowl is very shallow. By utilizing the potential energy generated by the elevation difference as rainwater flows from the roof to the ground, it creates a localized vacuum within the rainwater piping system, thereby inducing a siphon effect that rapidly discharges rainwater to the outdoors.

The Fundamental Problem That Siphon Drainage Aims to Solve

By utilizing atmospheric pressure to transport rainwater collected in catch basins located far from the vertical riser through horizontally laid horizontal pipes to the top of the vertical riser, this fundamental problem is solved, revealing the many advantages of siphon drainage.

The Formation Process of Siphoning in Roof Drainage

The formation process of siphoning refers to the transition from non-full-pipe flow to full-pipe flow within a pipe.

● Gravity Drainage Condition

When rainfall is light, the pipe is in a non-full-pipe flow state, i.e., gravity drainage.

● Submergence of the Stormwater Inlet—Filling of the Inlet Throat

As rainfall intensifies, the rainwater inlet cover is first submerged. The water depth in the open gutter at the throat of the rainwater inlet generates sufficient flow to bring the throat to a full-pipe state.

● Filling of the Downspout and Acceleration of Flow Velocity, Forming the Initial Siphon Flow

The filled section of the throat extends downward, increasing the effective head, which is no longer limited by the water depth in the gutter. When the entire downspout is fully filled, the initial siphon flow is established.

● Whether the horizontal pipe is filled or not does not play a significant role.

When the initial flow passes through the horizontal pipe, it typically flows at full pipe capacity because horizontal pipes generally lack a slope. The resistance caused by this flow will cause the initial flow rate to decrease slightly; to minimize total resistance, horizontal pipes are generally designed to be relatively large in diameter.

● Filling Begins at the Top of the Vertical Pipe: Coordination Between the Initial Flow Rate and the Diameter of the Vertical Pipe’s Top

Whether the initial flow rate can fill the top of the vertical pipe is key to the normal development of the siphoning process. The initial flow rate, reduced by the horizontal pipe, must be sufficient to fill the top of the vertical pipe; in other words, the diameter of the vertical pipe must not be so large that the initial flow rate cannot fill it

● The filled section of the riser extends downward until the riser is completely filled

Once the top of the riser is filled, the filled section extends downward. At the same time, the height of the filled section acts to increase the head, thereby increasing the flow rate. When the riser is completely filled, the system reaches its maximum discharge rate

● Filling of the Transition Section

The transition section is typically a horizontal section that requires pressure for discharge; therefore, the pressure at the lower end of the riser will be higher than atmospheric pressure. The resistance in the transition section causes the flow rate formed when the riser is filled to decrease slightly.

System Hydraulic Design

The Weipike Siphon Drainage Design Software automatically generates system diagrams, calculation reports, and bills of materials, providing customers with the most scientific, safe, and cost-effective siphon drainage design solutions.

The Weipike Siphon Drainage Calculation Software system fully complies with the requirements of the “Technical Specifications for Siphon-Type Roof Rainwater Drainage Systems.” It can automatically generate detailed and accurate system diagrams based on floor plans, determine the optimal pipe sizing, and provide detailed hydraulic calculation reports.

Specialized software and hydraulic calculations updated to reflect actual operating conditions

The goal of these calculations is to achieve full-pipe siphon flow

In practice, even when a pipe is completely filled with water, air is still present. Weipai Ke’s unique air-water mixture calculation ensures that the results closely match actual hydraulic conditions

Accurate calculations enable a stable and controllable water depth at the inlet, allowing the system to operate in a stable siphon state and effectively controlling roof water loads

Professional calculation software makes the calculations faster

System Guarantee

To ensure the safety and reliability of our siphonic roof rainwater drainage and collection system, we are continuously enhancing our product R&D capabilities. Given the accuracy and soundness of the design, the quality of system installation, and the comprehensiveness of our after-sales service system, among other factors, we will provide technical consultation services at any time upon customer request after the system is operational and will respond promptly to on-site service requests.

◎ System Installation Diagram

◎ FAQ

Q1: What are the advantages of siphon drainage compared with traditional gravity drainage?

A:

1. Full-pipe negative pressure drainage, fast drainage speed.

2. No slope required for horizontal pipes, saving ceiling space.

3. Fewer pipes and fewer holes on the roof.

4. Perfect for large factories, warehouses, malls, and high-rise buildings.

Q2: Is the siphon system suitable for sudden heavy rain in the Middle East?

A: Yes. Siphon systems quickly drain sudden concentrated rainfall and effectively avoid roof water accumulation.

Q3: Can siphon rain buckets resist sand and dust?

A: Equipped with double-layer stainless steel anti-block filters, specially optimized for dusty desert environments.

Q4: Do you provide hydraulic calculation and design drawings?

A: Yes, we provide free professional siphon hydraulic calculation, drainage design, and layout drawings for project bidding.