| 1 | Push-button cap | Chrome-plated brass, stainless steel, or moulded engineering plastic | Check finish consistency, corrosion resistance, fit, and ease of cleaning. | Assess as part of the waste fitting’s materials, construction, and overall performance. |
| 2 | Actuator and spindle | Brass, stainless steel, or suitable polymer components | Check smooth movement, secure engagement, alignment, and repeatable opening and closing. | Verify the assembled fitting meets applicable functional requirements and test methods. |
| 3 | Spring mechanism | Typically stainless steel; exact grade depends on design and service conditions | Check return action, resistance to corrosion, and function over repeated operation. | Performance is assessed for the fitting as a whole; do not assume a particular spring grade is mandated. |
| 4 | Waste body and outlet connection | Brass, stainless steel, or suitable plastics, depending on construction | Check connection dimensions, compatibility with the bath and trap, and installation access. A 1½-inch connection is common but not universal. | Dimensional and functional conformity should be assessed against the applicable requirements and product configuration. |
| 5 | Sealing washers and gaskets | EPDM and other suitable elastomers are commonly used | Check sealing surfaces, compression, material compatibility, and leakage after installation. | Leak-tight performance should be verified using the relevant standard test provisions. |
| 6 | Overflow linkage and connection | Metal or polymer linkage, with seals and connecting fittings as required by the design | Check compatibility with the bath’s overflow position, routing, and available installation space. | Evaluate the complete waste assembly and its intended sanitary-appliance application. |
| 7 | Surface finish and corrosion protection | Chrome plating, polished stainless steel, or other specified finishes | Request finish specifications and inspect for peeling, pitting, visible defects, and cleaning compatibility. | Confirm material and product performance using the applicable requirements; a decorative finish alone does not establish conformity. |
| 8 | Flow and drainage behaviour | Determined by the outlet, plug, passage geometry, and connected plumbing | Check drainage in the assembled installation and ensure the plug opens fully. | Use the applicable EN 274 test provisions and specified conditions rather than relying on an unsupported flow claim. |
| 9 | Product testing and documentation | Test reports, drawings, material information, and installation instructions | Confirm that documents identify the tested model and configuration and are issued by a suitably qualified laboratory or organization. | EN 274-1 sets product requirements; EN 274-2 covers test methods. Check the editions and national adoption applicable to the project. |
| 10 | Quality control and traceability | Batch records, inspection plans, and production identification | Ask how incoming materials, assembly, sealing, and finished-product checks are recorded. | Quality-control evidence supports consistent production; it is distinct from proof that a specific product meets requirements. |