What is the minimum load a WC seat should be able to carry?

The seat must withstand a static load of 1.5 kN (approx. 153 kg) for one hour without any failure (Clause 7.4).

How is the durability of the hinge tested?

The hinge assembly is tested for 30,000 opening and closing cycles without showing any signs of failure or excessive wear (Clause 7.6).

Does this standard specify resistance to household chemicals?

Yes, the standard requires the plastic surface to show no permanent staining or deterioration when tested with specified chemicals like sodium hypochlorite and synthetic detergents (Clause 7.2).

Are there different sizes of WC seats specified in this code?

Yes, the code specifies dimensions for four types of seats (Type A, B, C, D) in Table 1, which correspond to different types of WC pans.

IS 14732

: 1999

Plastic Water Closet Seats and Covers

CurrentFrequently UsedSpecificationBIMMEP · Drainage, Sewerage and Sanitary Fittings

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This standard specifies the requirements for materials, dimensions, construction, and performance of plastic water closet seats and covers. It ensures product quality, durability, and interchangeability for use with standard ceramic WC pans.

Specifies requirements for plastic water closet seats and covers, covering materials, dimensions, and performance.

Quick Reference Values

Minimum static load capacity on seat1.5 kN for 1 hour

Impact test requirement on seat2 kg steel ball dropped from 300 mm height

Hinge life cycle test30 000 cycles

Maximum water absorption for thermosetting plastics1.5 percent by mass

Resistance to cigarette burnNo ignition or progressive glow after 10 seconds contact

Practical Notes

Ensure the selected seat type (A, B, C, or D) matches the specific shape and size of the WC pan (as per IS 2556) to ensure a proper fit.

The ISI Mark on the product is a key indicator of its compliance with the mandatory quality and performance tests outlined in this standard.

Thermosetting plastic seats offer higher rigidity and scratch resistance, whereas thermoplastic seats are more flexible and less likely to crack under impact.