GB 25502-2017: Minimum allowable values of water efficiency and water efficiency grades for water closets Delivery: 9 seconds. Download (and Email) true-PDF + Invoice. Newer version: (Replacing this standard) GB 25502-2024 Get Quotation: Click GB 25502-2017 (Self-service in 1-minute) Newer / historical versions: GB 25502-2024 Preview True-PDF (Reload/Scroll-down if blank)
