Double key for underfloor heating valve maintenance Key benefits Quick, reliable access to underfloor heating valves: two key sizes in one tool let you operate common valve heads without searching for adapters. Saves time and reduces damage: correct fit minimizes slipping and rounding of valve fittings during adjustment or removal. Portable and convenient: compact design fits in a toolbox or pocket so handymen, plumbers, and HVAC technicians have the right tool on site. What it does Two-ended key provides two engagement sizes/shapes for operating and servicing underfloor heating valves and related fittings. Designed for manual use to open, close or adjust valves, and to assist with routine balancing and maintenance tasks. Simple, single-piece tool that eliminates the need to carry multiple wrenches or improvised tools. Compatibility and fit Intended for use with common underfloor heating valve heads and service points; fits the typical profiles found on manifolds and individual circuit valves. Works for both professional installers and DIY maintenance where standard valve sizes are used. Durability and performance Built for repeated use during maintenance cycles; delivers firm engagement and controlled torque for accurate valve adjustment. Compact form factor preserves leverage while remaining easy to handle in confined spaces. Practical use scenarios Routine balancing: quickly adjust flow on manifold valves during commissioning or seasonal balancing to achieve even heat distribution. Servicing and repairs: use the key to isolate or test individual circuits when replacing manifolds, actuators, or valve inserts. On-site troubleshooting: fit and operate concealed or recessed valve heads in tight boiler rooms, underfloor access panels, or crawl spaces without damaging trim. Why professionals choose it Reduces the risk of stripping valve heads during frequent adjustments. Keeps maintenance efficient by combining two useful engagement sizes in one lightweight tool. Suitable for service calls, installations, and routine upkeep where a dependable, easy-to-carry valve key is needed.