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IS 1795 : 1982Pillar Taps for Water Supply Purposes

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BS EN 200 · AS/NZS 3718 · ASME A112.18.1
CurrentFrequently UsedSpecificationBIMMEP · Sanitary Appliances and Water Fittings
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OverviewValues4InternationalTablesFAQ3Related

IS 1795:1982 is the Indian Standard (BIS) for pillar taps for water supply purposes. This standard covers the requirements for materials, dimensions, manufacture, workmanship, and testing of pillar taps used for water supply systems. It ensures standard threading, material durability against corrosion, and leak-proof performance for taps typically installed on wash basins and sinks.

Pillar Taps for Water Supply Purposes

Overview

Status
Current
Usage level
Frequently Used
Domain
MEP — Sanitary Appliances and Water Fittings
Type
Specification
Amendments
Amendment 1 (1991); Amendment 2 (1998)
International equivalents
BS EN 200:2008 · BSI (UK) / CEN (Europe)AS/NZS 3718:2021 · Standards Australia (AU) / Standards New Zealand (NZ)ASME A112.18.1-2018 / CSA B125.1-18 · ASME (US) / CSA (Canada)
Typically used with
IS 319IS 2643IS 4827IS 8931
Also on InfraLens for IS 1795
4Key values2Tables3FAQs

BIM-relevant code. See the BIM Hub for ISO 19650, IFC, and LOD/LOIN frameworks used alongside it.

Practical Notes
! Always verify the thread specifications (usually BSP parallel) to ensure compatibility with standard connecting plumbing fittings.
! For hard water areas, inspect the washer and spindle mechanism periodically as scale buildup can cause premature failure.
! Chromium plating quality (as per IS 4827) is crucial for preventing tarnishing and corrosion in wet environments.
Frequently referenced clauses
Cl. 3MaterialsCl. 4Manufacture and WorkmanshipCl. 5Nominal SizesCl. 6DimensionsCl. 9Testing
Pulled from IS 1795:1982. Browse the full clause & table index below in Tables & Referenced Sections.
Updates & Amendments2 amendments
1991Amendment 1 (1991)
1998Amendment 2 (1998)
Consolidated list per BIS. For the text of each amendment, refer to the BIS portal link above.
brassbronzechromium platingrubberplastic

International Equivalents

Similar International Standards
BS EN 200:2008BSI (UK) / CEN (Europe)
HighCurrent
Sanitary tapware - Single taps and combination taps for water supply systems of type 1 and type 2 - General technical specification
Defines general technical specifications for single taps (like pillar taps) for basins and sinks.
AS/NZS 3718:2021Standards Australia (AU) / Standards New Zealand (NZ)
HighCurrent
Water supply - Tap ware
Specifies requirements for metallic and non-metallic tapware, including pillar taps, for plumbing systems.
ASME A112.18.1-2018 / CSA B125.1-18ASME (US) / CSA (Canada)
HighCurrent
Plumbing Supply Fittings
Covers a wide range of plumbing fittings, including lavatory faucets which are functionally equivalent to pillar taps.
BS 1010-2:1973BSI (UK)
MediumWithdrawn
Specification for draw-off taps and stopvalves for water services (screw-down pattern). Draw-off taps and stopvalves of screwdown pattern
Older UK standard that formed the basis for many international codes, including early versions of IS 1795.
Key Differences
≠IS 1795:1982 specifies a mechanical endurance test of only 5,000 cycles, whereas modern standards like BS EN 200 mandate 200,000 cycles for mechanical headworks, indicating a vastly lower durability requirement in the Indian standard.
≠Modern international standards (AS/NZS 3718, ASME A112.18.1) have stringent requirements for lead content in materials and lead leaching into water (e.g., referencing NSF/ANSI 61). IS 1795:1982 has no such provisions for public health protection.
≠IS 1795 focuses on minimum flow rates for functionality, while standards like ASME A112.18.1 mandate maximum flow rates (e.g., 2.2 GPM) for water conservation, a concept not addressed in the 1982 Indian standard.
≠IS 1795 is prescriptive, detailing materials like Grade DCB 2 brass. International standards are more performance-based, allowing a wider range of materials (DZR brass, stainless steel, polymers) provided they pass tests for strength, corrosion, and health effects.
Key Similarities
≈All standards specify the fundamental geometry and purpose of a pillar tap: a single-inlet, single-outlet, manually operated valve for mounting on a sanitary appliance.
≈A common inlet thread size (G 1/2 or 1/2" NPT) is specified across all standards to ensure interchangeability with standard plumbing connections.
≈All standards require the finished tap body to undergo a high-pressure hydrostatic test to ensure it is free from leaks and can withstand system pressures without failure.
≈For chrome-plated taps, all standards specify requirements for plating thickness, adhesion, and corrosion resistance (e.g., via neutral salt spray testing) to ensure a durable and non-corroding finish.
Parameter Comparison
ParameterIS ValueInternationalSource
Mechanical Endurance Test5,000 cycles200,000 cycles (for mechanical headwork)BS EN 200:2008
Hydrostatic Strength Test (Body)2.5 MPa for 2 minutes2.5 MPa for 60 secondsBS EN 200:2008
Seat/Mechanism Pressure Test1.0 MPa for 2 minutes1.6 MPa for 60 secondsBS EN 200:2008
Maximum Lead LeachingNot specifiedMust comply with AS/NZS 4020; typically requires <5 µg/LAS/NZS 3718:2021
Maximum Flow Rate (Lavatory)Not specified8.3 L/min (2.2 GPM) at 414 kPa (60 psi)ASME A112.18.1-2018
Minimum Flow Rate (15mm)6 L/min at 0.01 MPa headClass A: ≥12 L/min at 0.3 MPa (different test conditions)BS EN 200:2008
Inlet Connection Thread (15mm)G 1/2G 1/2BS EN 200:2008
⚠ Verify details from original standards before use

Key Values4

Quick Reference Values
Nominal sizes15 mm and 20 mm
Hydraulic test pressure (body)1.6 MPa (16 kg/cm²)
Hydraulic test pressure (seat)1.0 MPa (10 kg/cm²)
Standard thread connectionParallel fastening threads (IS 2643)

Tables & Referenced Sections

Key Tables
Table 1 - Material for Component Parts
Table 2 - Dimensions of Pillar Taps
Key Clauses
Clause 3 - Materials
Clause 4 - Manufacture and Workmanship
Clause 5 - Nominal Sizes
Clause 6 - Dimensions
Clause 9 - Testing

Related Resources on InfraLens

Cross-Referenced Codes
IS 319:2019Free Cutting Brass Bars, Rods and Sections
→
IS 2643:2018Dimensions of Pipe Threads Where Pressure Tig...
→
IS 4827:2018Dimensions of Welding Electrodes
→
IS 8931:2013Bib taps and stop taps for water services (ca...
→

Frequently Asked Questions3

What are the standard sizes covered by this IS code?+
The standard covers nominal sizes of 15 mm and 20 mm.
What is the recommended material for the body of the pillar tap?+
Brass or cast bronze, typically finished with a high-quality chromium plating.
How is the pillar tap tested for leakage?+
It is subjected to a hydraulic pressure test without leaking or sweating, typically at 1.6 MPa for the body and 1.0 MPa for the seat.

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