waste plug and its accessories for sinks and wash-basins

IS 3311: Scope Summary & Key Specifications

• Scope: Covers materials, manufacture, and marking of waste plugs, chains, and stays for sinks and wash basins.
• Marking: Clause 5.1.1 mandates ISI Certification Mark on waste plugs, chains, and stays, ensuring compliance and quality control.
• Materials & Dimensions:
  • Metallic portion of screw type stay (optional):

    Size	Wash Basin (mm)	Sink (mm)
    A	42	60

• Units: Uses SI units as per IS standards (e.g., length in meters, force in newtons).
• Rounding Off: Results of tests or calculations are rounded as per IS:2-1960 to maintain precision.

This standard ensures product quality, dimensional consistency, and conformity to Indian engineering practices for plumbing fixtures.

flowchart LR
    A[Waste Plug] --> B[Chain]
    B --> C[Stay]
    C --> D[Marking with ISI Certification]
    D --> E[Quality & Compliance Assurance]

For detailed design, refer to Fig. 1 in IS 3311 for typical waste plug and chain stay dimensions.

IS 3311: Materials - Key Specifications & References

• Materials for Chain Stay (Clause 2.3):

  • Chain stays must be bolt or screw type.
  • Made of brass or corrosion-resistant materials.
  • Shank fully threaded up to underside of flange.

• Material Standards Referenced:

  • Brass & copper alloys: Specification for copper alloy waste fittings.
  • Phosphor bronze wires: For general engineering purposes.
  • Electroplated coatings: Nickel & chromium on copper alloys.
  • Wood screws: Technical supply conditions.
  • ISO Metric screw threads: Diameter-pitch combinations.

• Marking (Clause 5.1.1):

  • ISI Certification Mark mandatory on waste plug, chain, and stay.
  • Ensures compliance with inspection, testing, and quality control.

• Units & Definitions (SI Units):

  • Stress/pressure: Pascal (Pa) = N/m²
  • Force: Newton (N) = kg·m/s²
  • Energy: Joule (J) = N·m

Summary Table: Material Requirements

flowchart TD
    A[Materials] --> B[Chain Stay: Brass/Corrosion-Resistant]
    A --> C[Waste Plug & Chain: ISI Certified]
    B --> D[Fully Threaded Shank]
    C --> E[Conforms to IS 771, IS 2556]

Note: For detailed mechanical properties and dimensions, refer to the specific IS standards cited (e.g., IS 771, IS 2556).

IS 3311: Construction and Dimensions - Key Points

1. Waste Plug Dimensions (Clause 1.1.1)

• Dimensions are standardized to suit waste fittings as per IS 2963-1978.

2. Bolt Type Dimensions (Clause 2.3.1)

• Minimum diameter of flange: 12 mm

3. Screw Type Stay Metallic Portion (Clause 6.5)

• All dimensions are in millimeters.
• Fig. 1 (not shown here) illustrates typical waste plug, chain, and stay details.

4. Marking (Clause 5.1.1)

• Waste plugs, chains, and stays may carry the ISI Certification Mark ensuring compliance with ISI quality control.

Additional Notes:

• Use ISO metric screw threads for compatibility.
• Material and manufacturing must follow IS specifications for durability and fit.
• Dimensions ensure interchangeability with standard waste fittings.

flowchart LR
    A[Waste Plug Dimensions] --> B[IS 2963-1978 Standard]
    C[Bolt Flange Diameter] --> D[Min 12 mm]
    E[Screw Type Stay] --> F[Wash Basin: 42 mm]
    E --> G[Sink: 60 mm]
    H[Marking] --> I[ISI Certification Mark]

This concise summary covers essential construction and dimension specs from IS 3311. For detailed design, refer to IS 2963 and relevant IS screw thread standards.

IS 3311: Finish and Marking - Key Points

1. Rounding Off Values (Clause 0.4)

• Final test or analysis results must be rounded as per IS 2:1960.
• Number of significant figures in rounded values should match the specified values in the standard.

2. Marking (Clause 5.1.1)

• Each waste plug, chain, and stay may be marked with the ISI Certification Mark.
• ISI Mark ensures compliance with quality, inspection, and testing under ISI supervision.
• Use of ISI Mark is regulated by the Indian Standards Institution (Certification Marks) Act.

3. Typical Dimensions for Screw Type Stay (Clause 6.5)

• Dimensions are indicative; all in millimeters.
• Refer to Fig. 1 in IS 3311 for typical waste plug, chain, and stay details.

Summary Diagram: Marking & Finish Flow

flowchart TD
    A[Manufacture] --> B[Testing]
    B --> C[Rounding off results (IS 2:1960)]
    C --> D[Marking with ISI Certification Mark]
    D --> E[Final Product]

Note: Finish quality and marking assure product reliability and traceability per IS 3311.

IS 3311: Performance Requirements - Key Points

The provided context from IS 3311 lacks explicit performance formulas or tables. However, based on general IS code practices and engineering principles, here are the essentials:

1. Rounding Off (Clause 0.4)

• Final test or analysis results must be rounded per IS 2-1960.
• The number of significant digits in the result should match those in the specified value.

2. Marking (Clause 5.1.1)

• Waste plugs, chains, and stays must be marked with the ISI Certification Mark ensuring compliance and quality control.

3. General Performance Specifications (Typical for IS Standards)

• Material Strength: Must meet minimum tensile, compressive, or shear strength as specified.
• Durability: Resistance to corrosion, wear, or environmental effects.
• Dimensional Tolerances: As per IS specified limits.
• Safety Factors: Usually 1.5 to 2.0 depending on application.

Typical Rounding Rule (IS 2-1960):

Summary Diagram: Compliance Check Process

flowchart TD
    A[Test/Analysis Result] --> B{Round off per IS 2-1960}
    B --> C[Compare with Specified Value]
    C --> D{Complies?}
    D -->|Yes| E[Accept Product]
    D -->|No| F[Reject/Retest]

For detailed performance criteria, refer to the specific clauses in IS 3311 or related standards for material properties, testing methods, and acceptance limits.

IS 3311: Testing - Key Points & Specifications

1. Rounding of Test Results (Clause 0.4)

• Final test or analysis values must be rounded per IS 2:1960.
• Number of significant digits retained = number of digits in the specified standard value.

2. Marking (Clause 5.1.1)

• Waste plugs, chains, and stays may bear the ISI Certification Mark.
• ISI Mark ensures compliance with quality, inspection, and testing under ISI supervision.

3. Testing Guidelines (General)

• Testing must follow standard procedures ensuring accuracy and repeatability.
• Results should be reported with correct SI units (see IS 3311 unit table).

4. Units & Symbols (SI Units)

5. Additional Notes

• Testing apparatus and procedures should comply with relevant IS standards for cement, concrete, and hardware.
• ISI mark licensing governed by Indian Standards Institution rules.

flowchart LR
    A[Test Sample Preparation] --> B[Perform Test]
    B --> C[Record Observations]
    C --> D[Round off Results (IS 2:1960)]
    D --> E[Compare with Specified Values]
    E --> F{Complies?}
    F -- Yes --> G[Mark Product with ISI Mark]
    F -- No --> H[Reject/Retest]

For detailed test methods, refer to relevant IS codes on testing cement, concrete, and hardware products.

IS 3311: Chain Stay Specifications Summary

Materials & Construction

• Chain Stay Type: Bolt or Screw type (Clause 2.3)
• Material: Brass or equally corrosion-resistant material, fully threaded shank to underside of flange.
• Chromium Plating: Minimum Service Grade No. 2 as per IS 4827-1968 (Clause 4.1).

Chain Specifications (Clause 2.2)

• Material: Phosphor bronze or brass wire (IS 7608-1975 / IS 2704-1964).
• Wire Diameter: Minimum 1.80 mm.
• Link Size: Brazed oval links approx. 13 mm length.
• Chain Length: Minimum 300 mm (excluding shackle).
• Attachment: One end to waste plug shackle, other to stay shackle.

Metallic Portion Dimensions (Clause 6.5)

Key Notes:

• All dimensions in millimeters.
• Chain and stay must be corrosion resistant.
• Stay shank fully threaded for secure fixing.

graph LR
A[Waste Plug Shackle] -- Chain --> B[Chain Links (min 300 mm)]
B -- Chain --> C[Stay Shackle]
C -- Threaded Shank --> D[Flange Underside]

This ensures secure and corrosion-resistant connection between plug and stay per IS 3311 standards.

IS 3311 - Assembly Details for Screw Type Stay

Key Specifications (Clause 6.5 & related):

• All dimensions are in millimeters.
• Bolt flange diameter (Clause 2.3.1): Min 12 mm
• Screw flange diameter (Clause 2.3.2): Min 12 mm
• Screw shank length (Clause 2.3.2): Min 20 mm
• Screw thread: No. 11 wood screw thread as per IS: 451-1972

Marking (Clause 5.1.1):

• Waste plug, chain, and stay should carry the ISI Certification Mark ensuring compliance and quality control.

Summary Table for Screw Type Stay Dimensions:

Notes:

• The details are typical and not for design; verify with actual product specs.
• ISI mark ensures product quality as per Indian Standards Institution regulations.

flowchart LR
    A[Waste Plug Assembly] --> B[Screw Type Stay]
    B --> C{Dimensions}
    C --> D[Flange Dia ≥ 12 mm]
    C --> E[Shank Length ≥ 20 mm]
    C --> F[Thread: No. 11 Wood Screw]
    B --> G[Size A: 42 mm (Wash Basin)]
    B --> H[Size A: 60 mm (Sink)]

This

IS 3311: Compliance and References - Key Points

1. ISI Certification Mark (Clause 5.1.1)

• Waste plugs, chains, and stays may be marked with the ISI Certification Mark.
• ISI Mark ensures compliance with the standard under a strict system of inspection, testing, and quality control.
• Use of ISI Mark governed by Indian Standards Institution (Certification Marks) Act.

2. Units and Symbols (SI Units)

• Supplementary units include radian (rad) for plane angle and steradian (sr) for solid angle.
• Derived units include:
  • Force: Newton (N) = 1 kg·m/s²
  • Pressure/Stress: Pascal (Pa) = 1 N/m²
  • Energy: Joule (J) = 1 N·m
  • Power: Watt (W) = 1 J/s

3. Rounding Off (Clause 0.4)

• Final test or calculation results must be rounded off as per IS 2-1960.
• Number of significant figures must match the specified values in the standard.

4. References & Coordination

• The standard aligns with international practices and Indian field practices.
• Related standards include:
  • ISO Metric screw threads (Part II)
  • Technical supply conditions for wood screws
  • Electroplated coatings specifications

Summary Diagram: Compliance Flow

flowchart TD
    A[Product Manufacture] --> B[Inspection & Testing]
    B --> C{Meets IS 3311 Requirements?}
    C -- Yes --> D[ISI Certification Mark Granted]
    C -- No --> E[Non-compliance - Rework or Reject]
    D --> F[Continuous ISI Surveillance]

For detailed specifications, refer to IS 3311 and related Indian Standards publications.