T/XJBX 0135-2025 Active Group standards

T/XJBX 0135-2025 Installation quality control and acceptance guidelines for building water supply and drainage systems

Publish Date: 2026-01-23 Implement Date: 2026-02-01 For services related to genuine standard inquiry, procurement, translation, and other related services in China, please Contact Us

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Basic Information

Standard Code: T/XJBX 0135-2025

Standard Type: Group standards

Standard Status: Active

is_force_gb: no

CCS Name: Other petroleum products

ICS Name: The water supply system

Publish Date: 2026-01-23

Implement Date: 2026-02-01

Scope

The building water supply and drainage system is a key mechanical and electrical system that ensures the normal use and safe operation of buildings, covering multiple subsystems such as domestic water supply, domestic hot water, drainage, rainwater, ventilation, anti-odor prevention, reclaimed water (medium water) reuse, and interfaces with fire water supply. Its installation quality directly affects the hygiene and safety, comfort, and durability of buildings, and is highly correlated with typical quality issues such as leakage, blockage, noise, odor backflow, unstable water pressure, and secondary pollution. In recent years, with the promotion of prefabricated mechanical and electrical systems, integrated pipelines, lean construction, and BIM applications, the installation of building water supply and drainage systems has exhibited characteristics such as multiple material types, diverse connection methods, frequent conflicts between mechanical and electrical systems, frequent cross-trade operations, and a high proportion of concealed works. Quality risks have become more systemic and hidden, and relying solely on end-of-project acceptance for quality control is difficult to meet the requirements of project quality and lifecycle operation. Existing engineering construction standards set basic requirements for the construction and acceptance of building water supply and drainage projects, but in project practice, there are still widespread problems such as insufficient advance planning of quality control systems, incomplete process records, inadequate implementation of key process supervision and first-piece inspection systems, lax material and equipment inspection and reinspection, and lack of unified organization and evidence chain management for testing and commissioning. As a result, quality defects are often exposed after decoration is completed, leading to high rework costs, significant schedule delays, and frequent disputes over responsibility boundaries. T