What does VTR stand for in plumbing systems?

VTR stands for "Vent Through Roof" in plumbing systems. This term is essential as it refers to a type of venting system that allows the release of gases from plumbing fixtures to the outdoors, promoting proper ventilation and ensuring that harmful sewer gases do not accumulate inside a building. The design typically involves running the vent piping upward through the building and out through the roof, which helps maintain negative pressure within the drainage system while preventing any backflow of sewer gases.

In plumbing design, proper venting is crucial for the functionality and safety of the system; it allows air to enter the drainage system to facilitate drainage and protects trap seals from being siphoned. Correct implementation of VTR helps ensure compliance with building codes and enhances overall system performance.