Siphonic drainage uses the principle of negative pressure to accelerate the flow of rainwater.
With fewer air pockets in the pipes, the system reaches full-pipe flow faster, enabling rapid evacuation of water and reducing the number and size of vertical downpipes needed.
Pam Building’s epams® system is designed to quickly and efficiently drain large volumes of rainwater. It is ideal for large flat roofs on structures such as airports, shopping centers, warehouses, and gymnasiums.
epams® is designed for efficient installation: Reduced pipe length and trenching, push-fit assembly for faster setup, integrated grating and anti-vortex devices prevent clogging...Its low-maintenance design and long service life make it an ideal choice for modern building design and retrofits.
The epams® system is suited to a variety of large-scale projects: Commercial buildings with large flat rooftops, Industrial facilities where rainwater load is significant, Airports and hangars requiring fast drainage, Shopping malls and gymnasiums with extensive roofing areas...
Explore how our siphonic system for roof drainage solution keeps ambitious projects flowing, protected and future‑ready around the globe.
A siphonic roof drainage system like epams® requires expert design to ensure performance and safety. At Pam Building, our trained sales and technical teams assess your project feasibility and carry out a tailored hydraulic study using dedicated epams® sizing software.
We ensure proper system balance and maintain dynamic pressure under 5 bar to maximize system lifespan. A dedicated specialist supports your project from design to installation.
Any change to the pipework layout triggers a new hydraulic calculation to guarantee performance. Before final acceptance, Pam Building or an approved third party verifies that the installation matches the latest isometric drawings.
This complete technical support—feasibility analysis, project follow-up, and post-installation validation—delivers efficiency and peace of mind on every epams® project.
A siphonic roof drainage system like epams® requires expert design to ensure performance and safety. At Pam Building, our trained sales and technical teams assess your project feasibility and carry out a tailored hydraulic study using dedicated epams® sizing software.
We ensure proper system balance and maintain dynamic pressure under 5 bar to maximize system lifespan. A dedicated specialist supports your project from design to installation.
Any change to the pipework layout triggers a new hydraulic calculation to guarantee performance. Before final acceptance, Pam Building or an approved third party verifies that the installation matches the latest isometric drawings.
This complete technical support—feasibility analysis, project follow-up, and post-installation validation—delivers efficiency and peace of mind on every epams® project.
It uses negative pressure to fill the pipes entirely, creating a vacuum effect that accelerates the evacuation of rainwater.
While designed for large flat roofs, small buildings with limited downpipe space can also benefit from epams®.
Minimal. Integrated gratings and anti-vortex protection reduce the risk of clogging. Annual inspection is recommended.
Yes, especially with the stainless steel outlet designed for corrosion-prone environments.
By minimizing pipework and maximizing efficiency, it reduces material usage and supports green building criteria.
