Cast Copper Alloy Screw Down Bib Taps and Stop Valves for Water Services are essential plumbing products which aid in controlling and regulating the flow of water. Such plumbing products function by means of the screw-down mechanism which facilitates the opening and closing of the outlets where water flows. They can be found in bathrooms, kitchen sinks, utility lines, and service pipelines.
The compliance with the IS 781:1984 standards sets out the essential quality criteria that are used to judge these water fittings based on Indian standards. BIS testing includes a detailed assessment of the materials used, their ability to withstand pressure, resistance to leakages, and the overall mechanical strength of the assembled component.
What is IS 781: 1984?
This is the Indian Standard for Cast Copper Alloy Screw Down Bib Taps and Stop Valves for Water Services, used in water supply and plumbing systems. It emphasises design, workmanship, and performance to ensure reliable and long-lasting service. As per the BIS (Bureau of Indian Standards), these taps and valves are:
- Assessed for leakage resistance
- Checked for material quality
- Evaluated for operational performance
- Tested for flow control
Who can get BIS Approval for Bib Taps and Stop Valves?
BIS authorisation under IS 781: 1984 is required for businesses involved in manufacturing, importing, or supplying copper alloy water service fittings in India.
Applicable to:
- Manufacturers (India) - Must get BIS approval if the copper alloy taps are covered under QCO.
- Foreign Manufacturers - Need certification to export the products to India.
- Importers/Brand Owners - Must ensure that the products are BIS-certified before sale.
- Sellers/Distributors - Should only sell certified water supply valve.
Testing and Inspection Requirements
To ensure uniform quality of Cast Copper Alloy Screw Down Bib Taps and Stop Valves for Water Services, the Bureau of Indian Standards outlines the minimum requirements under IS 781: 1984. This certification ensures that manufacturers produce fittings with proper material quality, reliable construction, and dependable performance for water supply. The BIS testing parameters and quality checks for the taps and valves are listed below:
| Test Group | What is Tested | Purpose |
|---|
| Chemical Composition Test | Cast brass / leaded tin bronze and other alloy compositions | Ensures proper metallurgical properties and corrosion resistance of components |
| Dimensional & Tolerance Check | Dimensions of bib taps and stop valves using gauges and templates | Ensures accurate sizing and proper fitment during installation |
| Construction & Workmanship Inspection | Assembly quality, design, threading, and mechanical fit of components | Ensures proper build quality, strength, and functional integrity |
| Finish Quality Inspection | Surface finish, polishing, and nickel-chromium plating (if applicable) | Ensures aesthetic quality and surface protection against wear and corrosion |
| Hydrostatic Pressure Test | Pressure resistance of assembled bib taps and stop valves | Ensures leak-proof performance and ability to withstand working water pressure |
| Material Verification Test | Spindle, gland, crutch, and other auxiliary components | Ensures mechanical reliability and long service life of moving parts |
| Coating / Plating Test | Nickel-chromium plating thickness and adherence | Ensures durability of surface coating and resistance to corrosion |
| Functional Performance Test | Operation of screw mechanism and water flow control | Ensures smooth operation and reliable shut-off / flow regulation |
Steps for Water Service Valves BIS License
The BIS Authorisation process ensures that the copper alloy taps and valves meet the required standards for proper and efficient operation. This process is set by the Bureau of Indian Standards (BIS) and includes the following steps:
- Online Registration : Manufacturers register on the BIS Manak portal by submitting company, factory, and product details. Foreign manufacturers must appoint an Authorized Indian Representative (AIR).
- Testing at BIS-Approved Laboratory: Product samples are tested in BIS-approved laboratories for dimensional accuracy, material composition, hydrostatic pressure resistance, leakage performance, surface finish quality and durability.
- Application Submission: The application is submitted along with test reports, technical documents, and factory details. Foreign manufacturers must also submit AIR-related documents.
- Factory Inspection: Officers from BIS conduct a survey at the manufacturing facility to evaluate production processes, safety measures, and the quality control system.
- Grant of BIS License: Upon meeting all the conditions set by BIS, it grants the certification license under Scheme-I.
- Use of ISI Mark: Following approval, the manufacturer is authorized to use the ISI Mark on the product along with a valid CM/L number, confirming that the product meets BIS standards.
Documents for IS 781: 1984 Approval
| Document Category | Documents Required |
|---|
| Basic Details | GST Certificate, Email ID & Contact Number, Factory & Office Address, Rent Agreement / Lease Deed (if applicable),Partnership Deed (if applicable for partnership firms) |
| Manufacturing Details | List of Machinery, Process Flow Chart, Factory Layout Plan |
| Raw Material Details | List of Raw Materials, Supplier Details, Raw Material Invoices, Raw Material Test Certificates |
| Testing & Quality Control | List of Testing Equipment, Calibration Certificates, QC/Lab In-charge Appointment Letter & Qualification |
| Production Details | Annual Installed Capacity, Last Year Production Value |
| Product & Packaging Details | Quantity per Package, Nature of Packing, Product Printing / Marking Details |
| Management Details | Top Management Details, BIS Communication Contact Person |
| Brand & Certification Documents | Trademark / Brand Certificate, Consent Letter from BIS Recognized Laboratory |
| Additional Documents | Weekly Off Details, Hygiene Document (if applicable), Relaxation Letter (if applicable), Any Other Relevant Document |
| Foreign Manufacturer Requirement | Appointment of Authorized Indian Representative (AIR) for BIS coordination and compliance in India |
The Foreign manufacturers must designate an Authorized Indian Representative (AIR) in India. The representative is the local point of contact for the Bureau of Indian Standards (BIS) and manages all compliance and regulatory requirements in India.
Marking Requirements & License Validity
Marking Requirements
After the manufacturer obtains a BIS license, the ISI Mark for screw down bib tap must be written clearly and permanently either on its packaging or on the product. The marking should also include key information, such as the manufacturer’s identification and licence number (CM/L). This ensures the product complies with all safety and quality standards. Additional details are provided below:
| Requirement | Details |
|---|
| ISI Mark | Indicates that the product is BIS certified and conforms to standards |
| Standard Number | IS 781: 1984 |
| CML Number | Certification Marks License (CML) number issued by BIS |
| Manufacturer Details | Name of manufacturer or registered trademark |
| Batch / Date | Batch number, heat number, or manufacturing date for traceability |
Note: Marking is typically applied using durable stamping, tagging, or permanent printing to ensure clear identification during handling, storage, and transportation, as per BIS marking requirements.
How long is Water Supply Valve BIS License Valid?
| particulars | Details |
|---|
| Initial Validity | Typically 1 to 2 years, depending on BIS approval conditions |
| Renewal | Must be renewed before expiry by submitting the application along with the prescribed fee and updated documents |
| Surveillane | Includes periodic factory inspections and market sample testing conducted by BIS |
| Compliance | Continuous following to standard and applicable Quality Control Orders (QCOs) is mandatory |
| Risk | Non-compliance or failed sample testing may lead to suspension or cancellation of the BIS license |
Copper Alloy Plumbing Valves BIS License Fee Details
The cost of BIS Approval for a plumbing bib tap includes charges for application, inspection, license, testing, and marking. These fees are paid to BIS as per Scheme I guidelines.
| Charge Type | Indian Manufacturers | Foreign Manufacturers |
|---|
| Application Fee | INR 1,000 | USD 15 |
| Audit Charges | INR 7,000 | USD 3,200 – 5,900 |
| License Fee | INR 1,000 | USD 15 |
| Marking Fee | As applicable | As applicable |
| Testing Charges | As applicable | As applicable |
| EVTL India Consultancy Fee | As per actual | As per actual |
Note:
- Application fee for foreign manufacturers is payable via SWIFT (SAARC countries may pay in INR with applicable GST).
- Audit charges for foreign manufacturers vary based on country/location.
- The marking fee is determined based on the product category and production volume (MSME benefits may apply).
- Testing charges are to be paid directly to BIS-recognised laboratories.
- Consultancy fees can vary depending on product type and factory location.
Conclusion
The Indian Standard IS 781:1984 outlines the minimum requirements for Cast Copper Alloy Screw Down Bib Taps and Stop Valves. It tests the ability of the fittings to withstand water pressures, provide appropriate sealing, and control the water flow easily. This helps minimize leaks, damage, and problems related to maintenance. It also improves their reliability regarding shutting off as well as water management. The requirement for certification as per BIS standards improves acceptance of such fittings in construction projects involving infrastructure, housing works, or other public utilities where reliable plumbing fittings play a critical role. EVTL India can assist applicants with their certification processes by helping them prepare relevant documents and testing procedures.
