PB 塑料管和维护检查表

重新做了一下网页界面，补充了一些关于PB管和住户检查表资料到房屋保养栏目。

Polybutylene (PB) pipe is provided for consumers concerned that they may have this product in their homes. CSA has only received reports of isolated incidents involving this product.

• PB pipe is a flexible, grey pipe used in residential plumbing systems and hot water heating systems since the late 1970's
• Local building officials are responsible for inspection and enforcement of the Building Code to ensure the proper application and installation of PB pipe
• Consumers should check with a licensed plumber or building inspector to verify correct installation
• In order for PB pipe to perform effectively, it must meet performance requirements and be installed properly
• The CSA mark on a product indicates the pipe met the applicable requirements of the standard to which it was certified
• CSA first published requirements for PB pipe in 1977
• CSA's current edition of the standard for PB pipe -- CAN/CSA B137.8 - Polybutylene (PB) Piping for Pressure Applications -- was published in February 2002
• This standard establishes a set of requirements the product must meet in order to be certified by CSA
• The National Plumbing Code of Canada references CAN/CSA B137.8 - Polybutylene (PB) Piping for Pressure Applications
• CSA standards are developed using a consensus based process by committees of technical experts including knowledgeable regulatory authorities, technical industry representatives and others
• CSA standards are reviewed regularly and updated periodically as deemed necessary by the committee, based upon practical experience and technological changes that may affect the performance of the product