How long is the warranty period of fire pipe network in newly-built residential quarters stipulated by national laws?

According to \x0d\ x0d \ x0d \ under normal use, the minimum warranty period of the construction project is \ x0d \ a foundation and main structure project, which is the reasonable service life of the project specified in the design document; \x0d\ Secondary roofing waterproof project, leakage prevention for bathrooms, rooms and external walls with waterproof requirements, 5 years; \x0d\ III。 The heating and cooling system has two heating periods and cooling periods; \x0d\ IV。 Electrical system, water supply and drainage pipelines and equipment installation for 2 years; \x0d\ 5 The renovation project will last for 2 years. \ x0d \ x0d \ Fire fighting pipe network belongs to the fourth item, and the warranty period is 2 years.