Bristan Quest Basin Sink Taps with Ceramic Disc Valves Chrome Plated QST 1/2 C Bristan's Quest taps range is second to none when it comes to quality, price and style. It's designed to keep both homeowners and professionals in mind. A 5 year guarantee comes standard with this range, making it one of the most popular taps amongst homeowners and specifiers. PRODUCT SPECIFICATION Product code QST 1/2 C Finish Chrome Product Type Contemporary Construction Tap bodies are of all brass construction Valve Type turn ceramic disc valves Supply Suitable for all plumbing systems Inlet Connections BSP Water Pressure Min 0.2 bar Max. 8.