Wirquin Sonata Universal Toilet Seat & Cover — Black (SSO21BL)
The Wirquin Sonata (SSO21BL) is a heavy-duty universal toilet seat and cover crafted from durable, antibacterial thermoset material. Featuring an overlaying dished-style lid, this professional-grade seat is certified to BS1254 Type 1 standards, ensuring high strength and chemical resistance for commercial, contract, and domestic washrooms. Notice: This model is the official factory replacement that directly supersedes the previous Wirquin reference SSO11BL.
Identification & Specification Guide:
Current MPN: SSO21BL | Supersedes: SSO11BL | Material: Antibacterial Thermoset | Weight: 2.5 kg
Dimensions: Length 430–445 mm | Width 385 mm | Hinge Centres: 130–160 mm (Bottom Fix)
Key Features
- Direct Replacement: Fully replaces the discontinued Wirquin SSO11BL model with identical mounting parameters.
- BS1254 Type 1 Standard: Certified for high-traffic contract and domestic use for exceptional load-bearing resilience.
- Hygienic Thermoset: Non-porous antibacterial construction provides resistance to scratches, UV fade, and household cleaners.
- Adjustable Bottom-Fix Hinges: Durable plastic bottom-fix pillar hinges accommodate hole spacings between 130 mm and 160 mm.
Fitting & Pan Compatibility
Pan Access: Supplied with bottom-fix pillar fixings. Your WC pan must have open underneath access to tighten the wing nuts beneath the hinge holes.
Closing Mechanism: This is a fixed standard-close seat engineered specifically for longevity in contract and heavy-use applications.



