The plumbing system shall be provided with a system of vent piping that will allow the admission or emission of air so that the liquid seal of any fixture trap shall not be subjected to a pressure differential of more than 1 inch of water column. The UPC covers commercial applications and provides exceptions for certain commercial installations such as interceptors, soda fountains, bars, etc. The codes describe what the vent system must accomplish. IRC 3101.2 and UPC 901.2 mandates traps for all fixtures. UPC 901.2: Vents Required: Each plumbing fixture trap, except as otherwise provided in this code, shall be protected against siphonage and backpressure, and air circulation shall be ensured throughout all parts of the drainage system by means of vent pipes installed in accordance with the requirements of this chapter and as otherwise required by this code. Every trap and trapped fixture shall be vented in accordance with one of the venting methods specified in this chapter. Proper venting prevents trap siphonage, allows backpressure to dissipate and allows for air circulation within the system. Improper venting resulted in 321 people becoming infected with the SARS virus and contributed to 65 deaths. A 2003 SARS (Severe Acute Respiratory Syndrome) epidemic in Hong Kong was found to have been partially the result of dry plumbing traps. Sewer gases entering the living spaces can have deadly consequences. Sewer gases in the living space is about far more than just the noxious odors, these gases contain airborne bacteria. Without a vent, the fixture trap water seal can be lost due to siphonage or backpressure. It is the proper venting of sanitary sewer systems that has allowed plumbing fixtures to be safely located inside living areas. Venting requirements are a fairly recent requirement given the thousands of years we have been assembling plumbing systems. Ventilated plumbing traps have been required since the early 1900’s. Both the International and Uniform Plumbing Codes require that fixture traps be vented to protect against loss of trap water seal.
0 kommentar(er)
