What is the test pressure for new plumbing lines?

1.5 times the system design pressure. The test must be witnessed and documented before any pipework is concealed (Clause 6).

How can I prevent water hammer noise?

The code recommends keeping water velocity below 2.0 m/s and installing water hammer arrestors near quick-closing valves (e.g., solenoid valves, single-lever mixers).

What is the rule for preventing contamination from a toilet cistern?

The inlet valve must discharge above the critical water level (spill-over level) of the cistern, creating an 'air gap' to prevent back-siphonage as detailed in Annex B.

Are there rules for pipe installation in walls?

Yes, pipes in chases should be wrapped or sleeved to allow for thermal movement, protect against corrosion, and facilitate replacement. (Clause 5.3).

IS 16017 Part 1

: 2013

Code of Practice for Water Supply in Buildings - Design

CurrentFrequently UsedCode of PracticeBIMMEP · Plumbing Fixtures and Valves

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This code of practice provides guidelines and recommendations for the installation of drinking water supply systems inside buildings. It covers pipework installation, jointing methods, support systems, and the procedure for testing, commissioning, and disinfection of new installations. The standard, an adoption of BS EN 806-2, aims to ensure a safe, hygienic, and efficient water supply by preventing leakage, contamination, and inadequate pressure.

Covers principles for the design of water supply systems in buildings, including pipe sizing and distribution.

Quick Reference Values

Minimum test pressure for pipework1.5 times the system design pressure

Maximum recommended flow velocity for cold water2.0 m/s

Maximum recommended flow velocity for hot water1.5 m/s

Minimum air gap for 'Type AA' unrestricted free discharge20 mm or 2 x inlet pipe diameter, whichever is greater

Maximum horizontal support spacing for 25mm (1 inch) CPVC pipe1.0 m

Minimum residual head at highest outletGenerally 0.5 bar (approx 5m), varies by fixture

Key Formulas

Hazen-Williams Formula for Head Loss: h_f = (10.67 * L * Q^1.852) / (C^1.852 * D^4.87)

Practical Notes

Pay close attention to backflow prevention methods (e.g., air gaps, check valves) at cross-connections to avoid contamination of the potable water supply.

Ensure proper pipe supports are provided as per material-specific tables to prevent sagging, especially for plastic pipes which are more susceptible to temperature effects and UV degradation.

The hydraulic pressure test must be conducted before concealing any pipework. Witnessing and documenting the test results is crucial for quality assurance.