Siphonic Systems: High-Performance Rainwater Drainage for Large Roofs
We provide engineering, design and installation services for siphonic rainwater drainage systems in factories, industrial facilities, warehouses, logistics centers, shopping malls and other buildings with large roof areas. On site, we work exclusively with the GEBERIT PLUVIA system.

Engineering-Based High-Flow Drainage
A siphonic rainwater system is a drainage system designed to evacuate rainwater in a controlled way at high flow rates, particularly on large roof areas. Under suitable design conditions, it takes advantage of the pipeline running full of water and generating a negative-pressure siphonic flow. Beyond product selection, siphonic systems require hydraulic calculation and engineering design. As NG Mekanik, we deliver this system as an authorized and certified Geberit Pluvia applicator.
Core System Components
- Roof outlets
- Horizontal pipe runs
- Collector lines
- Vertical stacks
- Building drainage system
Advantages of Siphonic Systems

Designed for Large Roofs
Suitable solutions for the controlled evacuation of large roof areas.

Optimized Pipe Routing
Pipe routes are optimized through correct hydraulic design.

Fewer Vertical Lines
The number of vertical stacks can be reduced depending on project conditions.

Architectural Flexibility
Optimized routing contributes to better space usage in large industrial buildings.
From Engineering to Installation
Site Survey & Analysis
Roof area, geometry and existing drainage are examined.
Hydraulic Calculation
Rainfall flow rates, outlets and pipe systems are calculated.
Design
Piping and drainage plans are prepared.
Coordination
Coordinated with architectural, steel and other installation works.
Installation
Outlets, pipes and support systems are installed on site.
Inspection & Handover
System checks are completed and the project is handed over.

Buildings with Large Roof Areas
NG Mekanik uses only GEBERIT PLUVIA products on site for siphonic rainwater drainage systems; HDPE piping, support/suspension systems and drainage connection systems are designed and installed to this brand's standard.
Only Geberit Pluvia for Siphonic Systems
As the authorized and certified Geberit applicator in Balıkesir, NG Mekanik uses only the globally proven Geberit Pluvia system on site for siphonic rainwater drainage systems. The entire process — from design to material supply, from installation to commissioning — is carried out with genuine Geberit products and the manufacturer's technical standards.

Genuine Geberit Pluvia Components
Only genuine, certified Geberit Pluvia system components are used on site, from the outlet to the pipe.
Genuine Product · Geberit Pluvia
Proven Performance in Heavy Rainfall
Geberit Pluvia is an engineering-approved system for reliable evacuation even in high-flow rainfall.
Proven Performance · Geberit PluviaWhy Geberit Pluvia?
- Authorized and certified Geberit applicator in Balıkesir
- Genuine, certified product supply
- Long-lasting, durable material construction
- International quality standards
- Installation and technical support under manufacturer warranty
About Siphonic Systems
What is a siphonic system?
A siphonic system is an engineering-based drainage system designed to evacuate rainwater at high flow rates, particularly on large roof areas.
Where are siphonic systems used?
They can be used in factories, warehouses, logistics centers, shopping malls, stadiums and other industrial and commercial buildings with large roof areas.
What is the difference between a siphonic system and a conventional rainwater system?
Conventional systems mainly rely on the principle of gravity, while siphonic systems take advantage of the pipeline running full and generating negative pressure.
Is hydraulic calculation required for a siphonic system?
Yes. Roof area, rainfall flow rate, outlet capacity, pipe diameters, level differences and system routing must all be evaluated together.
What pipes are used in siphonic systems?
Different piping systems can be used depending on the project and the system manufacturer's technical requirements; HDPE pipes are commonly preferred.
Which brand do you use for siphonic systems?
We use only GEBERIT PLUVIA products on site for siphonic rainwater systems. As an authorized and certified GEBERIT applicator in Balıkesir, every system component from the outlet to the pipe is a genuine GEBERIT product.
Do you sell and install GEBERIT PLUVIA in Balıkesir?
Yes. NG Mekanik provides authorized sales and installation of the GEBERIT PLUVIA siphonic roof drainage system in and around Balıkesir, end-to-end — including design, material supply, installation and commissioning.
Let's Engineer the Right Drainage Solution for Your Roof
Share your factory, warehouse or industrial facility roof project with us.
