Vitreous Sanitary Appliances (Vitreous China) -, Part 15: Specific Requirements of Universal Water Closets

IS 2556 Part 15: Scope - Key Points and Specifications

• Scope covers: Functional and connecting dimensions of vitreous sanitary appliances, critical for plumbing compatibility.

• Dimensions:

  • Functional dimensions: Non-connecting dimensions essential for appliance function.
  • Connecting dimensions: Critical for plumbing connections.
  • Both are detailed in Table 1 (functional) and Table 2 (connecting), referenced with Fig. 1A and Fig. 1B respectively.

• Key update:

  • Radius of free space to be measured 40 mm from the outlet end center (Table 2).

• Referenced IS Standards:

  IS No.	Title
  774:1984	Flushing cisterns for WCs and urinals
  2556 (Part 1):1994	Vitreous sanitary appliances - General requirements
  9140:1996	Sampling methods for vitreous and fire clay sanitary appliances

• Rounding off:

  • Follow IS 2:1960 rules for rounding numerical test results, maintaining significant digits as per specified values.

Summary Diagram of Dimensions Reference

graph LR
A[IS 2556 Part 15 Scope]
A --> B[Functional Dimensions (Table 1 & Fig 1A)]
A --> C[Connecting Dimensions (Table 2 & Fig 1B)]
C --> D[Radius of free space = 40 mm from outlet center]
A --> E[Referenced IS Standards]
E --> F[IS 774:1984]
E --> G[IS 2556 Part 1:1994]
E --> H[IS 9140:1996]

This ensures standardized appliance sizing for plumbing compatibility and testing consistency.

IS 2556 Part 15 - References & Key Specifications

Referenced Standards (Table 2):

Key Dimensions (Clause 5.1)

• Functional dimensions and connecting dimensions are specified in Table 1 and Table 2 respectively.
• Refer to Fig. 1A (functional) and Fig. 1B (connecting) for graphical details.
• Example update:
  • Radius of free space (min) = 40 mm from outlet end center.

Rounding Off (IS 2:1960)

• Final test/calculation values must be rounded off per IS 2:1960.
• Retain same significant figures as specified values.

This ensures consistency and compliance with plumbing and sanitary appliance standards.

IS 2556 Part 15: General Requirements Summary

• Scope: Comply with IS 2556 Part 1 for materials, manufacture, glazing, defects, minimum thickness, tolerances, performance, and test methods.

• Dimensions:

  • Functional Dimensions: Refer Table 1 & Fig. 1A
  • Connecting Dimensions (critical for plumbing): Refer Table 2 & Fig. 1B

• Referenced Standards:

  IS No.	Title
  IS 774:1984	Flushing cistern for water closets and urinals (non-plastic)
  IS 2556 (Pt 1)	Vitreous sanitary appliances - General requirements
  IS 9140:1996	Sampling methods for vitreous and fire clay sanitary appliances

Key Points:

• Minimum thickness, glazing quality, and defect limits are as per IS 2556 Part 1.
• Dimensional tolerances ensure interchangeability and proper plumbing fit.
• Performance tests include water tightness, strength, and durability.

Typical Functional & Connecting Dimensions (Example Extract):

(Refer IS 2556 Part 15 Table 1 & 2 for detailed values)

flowchart LR
    A[General Requirements] --> B[Materials & Manufacture]
    A --> C[Dimensions]
    C --> D[Functional Dimensions (Table 1, Fig 1A)]
    C --> E[Connecting Dimensions (Table 2, Fig 1B)]
    A --> F[Performance & Tests]
    A --> G[Referenced IS Codes]

For precise values, always consult the actual tables and figures in IS 2556 Part 15 and Part 1.

IS 2556 Part 15: Sizes and Dimensions for Universal Water Closets

Key Specifications:

• Functional dimensions (non-connecting) and connecting dimensions (critical for plumbing) are specified in:
  • Table 1 (Functional dimensions)
  • Table 2 (Connecting dimensions)
• Refer to Fig. 1A (functional) and Fig. 1B (connecting) for dimensional illustrations.
• Minimum water seal depth: 50 mm (Clause 4.2).
• Custom sizes allowed with purchaser agreement, but all other standards apply.
• Tolerances: If not specified, follow IS 2556 Part 1.

Important Dimension Note (Table 2 Update):

• Radius of free space: Measured from the centre of outlet, with a minimum distance of 40 mm from outlet end.

Typical Dimensions Summary (Example from IS 2556 Part 15):

Diagram Reference (Simplified):

flowchart LR
    A[Centre of Outlet] -->|40 mm| B[Radius of Free Space]
    A --> C[Outlet End]
    D[Water Seal Depth] -->|≥ 50 mm| E[Trap Seal]

For exact values, always refer to Tables 1 & 2 and Figures 1A & 1B in IS 2556 Part 15.

IS 2556 Part 15: Dimensions and Tolerances for Universal Water Closet

1. Functional Dimensions (Table 1, Fig. 1A)

2. Connecting Dimensions (Table 2, Fig. 1B)

IS 2556 Part 15: Key Construction Specifications for Universal Water Closets

1. Functional Dimensions (Table 1, Fig. 1A)

2. Connecting Dimensions (Table 2, Fig. 1B)

IS 2556 Part 15: Materials and Manufacture - Key Points

• General Requirements:
  Comply with IS 2556 Part 1 (1994) for materials, manufacture, glazing, defects, minimum thickness, tolerances, performance, and test methods.

• Materials:
  Vitreous china (vitreous sanitary appliances) as per IS 2556 Part 1, ensuring:

  • High durability
  • Smooth, impervious glazing
  • Resistance to chemicals and abrasion

• Manufacture:

  • Controlled firing and glazing processes
  • Defect-free surfaces (no cracks, blisters, or pinholes)
  • Minimum thickness as specified in Part 1 (typically 6-10 mm depending on the appliance)

• Testing:
  Follow IS 9140 (1996) for sampling and quality checks.

Reference Table of Related Standards

Summary Diagram: Material & Manufacture Flow

flowchart TD
    A[Raw Materials] --> B[Shaping & Forming]
    B --> C[Firing Process]
    C --> D[Glazing]
    D --> E[Quality Inspection]
    E --> F[Packaging & Dispatch]

Note: For detailed thickness, performance, and defect criteria, refer directly to IS 2556 Part 1.

IS 2556 Part 15: Flushing Tests Key Points

1. Toilet Paper Test (Clause 8.2)

• Fill WC to normal water seal level.
• Add 6 pieces of toilet paper (150 mm × 115 mm, 0.05 mm thick polyethylene sheet allowed).
• Flush 4 times.
• At least 3 out of 4 flushes must discharge all paper.

2. Non-Absorbent Balls Test (Clause 3.7)

• Drop 50 balls (3.7 ± 0.1 g, 20 ± 0.1 mm diameter) into WC.
• Flush 5 times.
• Minimum 85% of balls must be flushed out in total.

3. Splash Test (Clause 8.7.1)

• Fill WC with colored water to design seal level.
• Flush and observe splash over rim onto floor.
• Up to 10 isolated droplets allowed without rejection.

4. Load Bearing Test (Clause 9)

• Apply 400 ± 5 kg (4 ± 0.05 kN) for 1 hour on WC top surface.
• Use 100 mm × 100 mm wooden beam across opening.
• No damage or defects allowed.

Functional & Connecting Dimensions Summary (Tables 1 & 2)

Two-Piece Bend Dimensions (Table 3)

flowchart TD
    A[Fill WC to water seal level] --> B[Add 6 toilet paper pieces]
    B --> C[

IS 2556 Part 15: Load Bearing Test for Water Closets (WC)

Key Specifications (Clause 9):

• Load applied:
  • 400 ± 5 kg or 4 ± 0.05 kN
• Duration:
  • 1 hour (minimum)
• Load application:
  • Place load on a wooden beam 100 mm × 100 mm cross-section
  • Beam positioned across the center of the WC top opening
• Fixing:
  • WC must be securely fixed on the floor with proper screws
• Acceptance criteria:
  • No damage or defects after test

Summary Table:

Load Bearing Test Setup (Mermaid Diagram):

graph TD
    A[WC Fixed to Floor] --> B[Wooden Beam 100x100 mm]
    B --> C[Load 400 ± 5 kg (4 ± 0.05 kN)]
    C --> D[Load applied centrally on WC top opening]
    D --> E[Duration: 1 hour]
    E --> F[Check for damage or defects]

This test ensures the WC can safely bear typical user loads without structural failure, confirming durability and safety compliance per IS 2556 Part 15.

IS 2556 Part 15: Sampling, Inspection & Lot Inspection Summary

• Sampling & Inspection Method:
  Follow IS 9140 : 1996 for procedures on sampling, process inspection, and lot inspection of vitreous sanitary appliances.

• Rounding Off Results:
  Use IS 2 : 1960 for rounding test results. Retain the same number of significant digits as specified in the standard.

• Key Inspection Steps (from context):

  • Flushing Test: Charge WC with colored water to design water seal level; activate flush; observe splash. Up to 10 isolated droplets on floor allowed without rejection.
  • Load Bearing Test: Apply load of 400 ± 5 kg (4 ± 0.05 kN) for 1 hour on a 100 mm × 100 mm wooden beam across WC opening. No damage allowed.

References Table (from IS 2556 Part 15)

Summary Diagram: Inspection Process Flow

flowchart TD
    A[Start: Lot Received] --> B[Sampling as per IS 9140]
    B --> C[Perform Tests (Flushing, Load Bearing)]
    C --> D{Test Results within limits?}
    D -- Yes --> E[Accept Lot]
    D -- No --> F[Reject Lot or Re-inspect]

For detailed sampling tables and acceptance criteria, refer directly to IS 9140.

IS 2556 Part 15: Marking and Identification Key Points

Clause 11.1: Marking Requirements

Each closet (sanitary fixture) must be clearly and indelibly marked with:

• Manufacturer's name or trade-mark
• Batch or lot number

This ensures traceability and quality control.

Clause 11.2: BIS Certification Marking

• Use of the BIS Standard Mark is regulated by the Bureau of Indian Standards Act, 1986.
• Licence for use of the Standard Mark is granted under specific conditions by BIS.
• The Standard Mark certifies compliance with Indian Standards and quality assurance.
• Details and permissions for use are available from BIS regional offices.

BIS Contact Summary (for licensing and permissions)

Summary

• Marking: Manufacturer + Batch number (indelible)
• Certification: BIS Standard Mark under license
• Purpose: Quality assurance, traceability, legal compliance

flowchart TD
    A[Manufacture Closet] --> B[Mark Manufacturer Name/Trade-mark]
    A --> C[Mark Batch/Lot Number]
    A --> D[Apply BIS Standard Mark (if licensed)]
    D --> E[BIS Certification ensures quality & compliance]

This ensures products are identifiable and certified per IS 2556 Part 15.