SNT 2.04.01-98 PDF

Full title and description

SNT 2.04.01-98 — Internal water supply and sewerage of buildings (often published/known in regional collections as KMK 2.04.01-98). The document contains rules and technical requirements for the design of internal cold and hot water supply, internal sanitary and storm sewerage and roof drainage for buildings, together with provisions on materials, fittings, calculation of design flows and acceptance testing.

Abstract

This standard provides normative requirements for planning, calculation and design of in‑building water supply and drainage systems. It addresses determination of design water consumption and wastewater flows, layout and sizing of pipelines and risers, selection of pipe materials and valves, sanitary fixture arrangements, venting and anti‑siphon measures, hot‑water system provisions, drainage of roofs and internal storm systems, hydraulic calculations, and commissioning/testing procedures. It has been issued with later amendments and subsequently replaced by a newer consolidated national technical document.

General information

• Status: Replaced / superseded by a newer national technical code (document indicated as SHNK / SHNK/SHNК 2.04.01-22 or equivalent updated code in the national KMK/SHNK series).
• Publication date: 1998 (original issuance as 2.04.01‑98).
• Publisher: Published in the KMK / national construction norms series (issued through Uzbekistan national construction authorities and developers listed for KMK documents). Developers and distributors of the KMK series include national construction institutes and the State construction/architecture bodies responsible for technical design standards.
• ICS / categories: Installations in buildings (ICS 91.140 — water supply systems, sanitary installations and drainage systems).
• Edition / version: Edition 1998 (2.04.01‑98) with recorded Amendments No.1 and No.2 in later updates; later replaced by the 2022 updated SHNK/SHNK edition.
• Number of pages: Approx. 84 pages (typical published PDF/page count reported by document distributors).

Scope

The standard applies to the design of new and reconstructed internal systems of cold and hot potable water supply, internal sanitary and storm sewerage, and roof drainage inside buildings. It covers hydraulic calculation methods, design water consumption and wastewater norms, layout and sizing of internal piping, sanitary fixture requirements, reasonable material and joint selections, provisions for thermal insulation and corrosion protection where relevant, metering and testing procedures, and rules for safe installation and commissioning. It does not cover specialized industrial process water systems, external municipal networks (covered by external water/sewer KMK documents), nor certain dedicated firefighting or hazardous‑process water systems governed by separate normative acts.

Key topics and requirements

• Definition of internal water supply and internal sewerage systems and their components (risers, branches, fixtures, traps, vents).
• Design calculation methods for determining design water consumption and wastewater generation rates, including probabilistic and tabular norms for different building types.
• Hydraulic sizing rules for cold and hot water pipelines, pressure and head loss considerations, and recommendations for booster/pressure systems where needed.
• Requirements for selection of pipe materials, fittings, valves and joints (including polymer and metal piping recommendations and installation notes).
• Layout rules for sanitary fixtures, drainage slopes, trap and venting design to prevent siphoning and odors.
• Roof and internal storm drainage design, rainwater collection and routing to external networks or retention where required.
• Provisions for thermal insulation of hot‑water distribution, corrosion protection and access for maintenance.
• Acceptance testing, flushing, disinfection and commissioning procedures for potable water systems and leak/testing protocols for sewerage.
• Requirements for documentation, drawings, and as‑built records for handover to building operators.

Typical use and users

Primary users are building services (MEP) designers, plumbing engineers, architectural‑engineering firms, construction contractors, site supervisors, and regulatory/inspection authorities engaged in building design, retrofit and commissioning. The standard is used to produce design drawings and specifications for residential, public and commercial buildings, and as a normative reference for construction permits and acceptance works.

Related standards

Commonly referenced companion documents include external water supply and sewerage KMK rules (e.g., KMK 2.04.02 / KMK 2.04.03 series for external networks), regional SNiP/SP consolidated rules on internal water supply and sewerage (where applicable), and later national consolidated technical codes that updated or replaced the 1998 KMK edition (SHNK/SHNK 2.04.01‑22 or equivalent). National plumbing, drinking water quality and sanitary regulations are also typically cross‑referenced.

Keywords

internal water supply, internal sewerage, plumbing, drainage, roof drainage, hot water supply, cold water distribution, sanitary fixtures, hydraulic calculation, KMK 2.04.01-98, SNT 2.04.01-98.

FAQ

Q: What is this standard?

A: It is the national/regional technical standard for internal water supply and internal sewerage of buildings issued as 2.04.01‑98 (appearing in KMK collections). It prescribes design, calculation and installation requirements for in‑building potable water and sanitary drainage systems.

Q: What does it cover?

A: It covers design flows and consumption norms, hydraulic sizing, layout of piping and fixtures, venting and trap design, choice of materials, hot‑ and cold‑water system requirements, roof and internal storm drainage, and commissioning/testing procedures for potable and sanitary systems inside buildings. It excludes external network design and specialized industrial process water systems.

Q: Who typically uses it?

A: MEP/plumbing designers, consulting engineers, construction contractors, building inspectors and facility managers use the standard to prepare compliant designs, specifications and for inspection/acceptance of internal water and drainage systems.

Q: Is it current or superseded?

A: The 1998 edition (2.04.01‑98) has recorded amendments and has subsequently been superseded by an updated national technical code in the KMK/SHNK series (references indicate replacement by an updated 2022 series document, SHNK/SHNK 2.04.01‑22 or equivalent). Users should consult the latest national consolidated code or the competent national construction authority for the legally current document.

Q: Is it part of a series?

A: Yes — it is part of the KMK / national construction norms series addressing building engineering services; related items in the series cover external water supply, sewerage, heating, ventilation and other building services. These KMK design standards are grouped by topic and updated independently or consolidated into newer SHNK documents.

Q: What are the key keywords?

A: internal water supply, internal sewerage, plumbing, drainage, hot water, cold water, sanitary fixtures, hydraulic calculation, KMK, SNT 2.04.01-98.