IS 8931 : 2021
Copper Alloy Single Taps, Combination Tap Assemblies, Stop Valves and Single Lever Mixers for Water Services
summary
Copper Alloy Single Taps, Combination Tap Assemblies, Stop Valves, and Single Lever Mixers are plumbing fittings used to control and regulate water flow in residential, commercial, and industrial water supply systems. Manufactured from durable copper alloys such as brass, these fittings provide corrosion resistance, strength, leak-proof performance, and long service life.
Why BIS Certificate is Mandatory for Copper Alloy Single Taps, Combination Tap Assemblies, Stop Valves and Single Lever Mixers for Water Services
BIS certification is mandatory to ensure plumbing fittings meet Indian Standards for safety, material quality, pressure resistance, and performance. Since these products are directly connected to potable water systems, certification prevents leakage, contamination, and premature failure, ensuring consumer safety, durability, and regulatory compliance in the Indian market.
What is BIS Certified for Copper Alloy Single Taps, Combination Tap Assemblies, Stop Valves and Single Lever Mixers for Water Services
The BIS certified specification defines requirements for material composition, mechanical strength, dimensional accuracy, surface finish, plating thickness, pressure performance, and leakage testing. It ensures copper alloy taps and valves comply with Indian Standards, guaranteeing durability, safe water contact, corrosion resistance, and reliable long-term performance in water services.
Test required for Copper Alloy Single Taps, Combination Tap Assemblies, Stop Valves and Single Lever Mixers for Water Services
| Title | Mandatory/Optional |
|---|---|
| Material | Optional |
Manufacture, workmanship and construction
| Title | Mandatory/Optional |
|---|---|
| General, casting, forging, plastic moulding & Machining | Required |
| Screw threads | Required |
| Waterway | Required |
| Flow straightening and aerating device (As per manufacturerdeclaration) | Required |
| Body seat | -- |
| Bonnet assembly | -- |
| Gland packing | Required |
| Flanges | Required |
| Knob | Required |
Dimensions of Single Pillar and Bib Tap, Combination Tap Assembly, Stop Valve and Angle Stop Valve
| Title | Mandatory/Optional |
|---|---|
| Minimum Thickness | Required |
| Body | Required |
| Bonnet assembly | Required |
| Washer plate | Required |
| Seat washer | Required |
Dimensions of Single Lever Mixer
| Title | Mandatory/Optional |
|---|---|
| concealed diverter for bath and shower mixer | Required |
| single lever sink mixer with swivel spout | Required |
| single lever pillar mounted basin mixer | Required |
| wall mounted single lever sink mixer with swivel spout | Required |
| single lever bath and shower mixer | Optional |
| Diameter of Single Lever Cartridge | Optional |
| Nuts | Optional |
Additional Requirements for Accessible Taps
| Title | Mandatory/Optional |
|---|---|
| Lever handle | Required |
| Information on taps | Required |
| Thermostat installation, Hot & cold water taps identification | Required |
Finish
| Title | Mandatory/Optional |
|---|---|
| General | Required |
| Nickel chromium plating on taps & valves, knobs & knobs components of plastic/zinc base alloy | Optional |
Performance test
| Title | Mandatory/Optional |
|---|---|
| Water tightness characteristic | Required |
| Pressure resistance characteristicDead load test | Required |
| Hydraulic characteristic (Flow rate) | Required |
| Hydraulic characteristic (Flow rate)Additional Requirements for Water Efficiency (Flow rate) | Required |
| Mechanical strength characteristic | Optional |
| Mechanical Endurance Characteristics | Optional |
Benefits of BIS Certification for Copper Alloy Single Taps, Combination Tap Assemblies, Stop Valves and Single Lever Mixers for Water Services
1. Assured Material Quality
BIS certification ensures the use of approved copper alloys with controlled chemical composition, preventing corrosion, cracking, or contamination in water supply systems.
2. Leak-Proof and Pressure Safety
Certified products undergo pressure and leakage tests, ensuring reliable performance under varying water pressures.
3. Safe for Drinking Water
BIS standards ensure fittings are suitable for potable water use, reducing risks of harmful metal leaching.
4. Legal Market Approval
Mandatory BIS certification allows manufacturers and importers to legally sell products in India without regulatory penalties.
5. Enhanced Brand Credibility
BIS-marked plumbing fittings gain higher trust among builders, contractors, and consumers, improving market acceptance and competitiveness.