Sovent drainage system is the right solution to improve plumbing performance in tall buildings. The advantage is that all drain, waste, and venting is done in a single stack, instead of the usual two-stack system. As far as maintenance, sovent single-stack system saves time—because you only have to repair one pipe instead of two—and money—because there are fewer pipes to buy and repair.
Plumbing Problems in Tall Buildings
Tall buildings face plumbing problems that single-story buildings do not have to deal with. One of these problems is the water pressure in the drainage system. Single-story plumbing is simple. The water flows from sinks, toilets, and baths into a horizontal drain pipe. As long as the drain pipe is clean, the wastewater will end up in the city’s main sewer line without a hitch. However, in tall buildings, wastewater travels longer distances and, more importantly, it goes vertically in free-fall. That means that plumbing in multistoried buildings must consider air pressure, ventilation and even gravity.
The challenge in managing drain water in a tall building is air pressure. In tall buildings, each floor’s drain pipes converge in a vertical line called soil stack or drainage stack. All wastewater in the soil stack travels down and ends up in a sewer tank or a main sewage line. The difficulty lies in that as water flows vertically through the soil stack, it creates air pressure that affects how water flows through the pipe. For example, the air pressure inside the drainage stack can create a siphon effect that can slow or stop water flow completely.
That is why most buildings have a second vertical pipe called ventilation pipe. This pipe’s job is to let air flow inside the drain pipes, to relieve the air pressure inside the system. This is what most tall buildings use. It is known as a two-stack or double-stack drainage system; one pipe for draining, and one for ventilating.
The problem is that installing a ventilation pipe requires double the amount of pipes—because everything has to get connected twice—and all repairing projects are like repairing two systems at the same time: a drainage system and a ventilation system.
How Pipe Pressure Causes Problems
Have you noticed how toilets always have water in them? That is a water seal trap. All drains have one. Think of the kitchen sinks and the j-bend pipe below them. Water seal traps keep wastewater gasses from coming into the building. The problem is that these water traps are very sensitive to air pressure in the pipe. So, back to the soil stack, if the air pressure is not managed well, the seal traps will get sucked into the drain letting smells come in or the wastewater will backflow into sinks and toilets.
How Sovent Makes Tall Building Drainage Simple
Sovent is a single-stack drainage approach that improves drainage flow in tall buildings. Thanks to this method, tall buildings can drastically reduce the number of materials used in repairs and installations.
Here are some benefits you get from using sovent drainage system:
- Better water flow.
- Saves installation space.
- Single-stack saves you money by needing fewer pipes and fittings.
- Reduces pneumatic pressure inside the pipe.
- Fewer pipes means less pipe testing.
- Fewer pipes means fewer joints, which means less potential leaks to worry about.
- Fewer pipes means designing the plumbing system is easier and faster.