The Monument 2040G Pump Nut Spanner is a specialist open-ended spanner designed specifically for servicing domestic central heating pumps. This dedicated tool provides a precise fit on the 52mm pump nuts commonly found on household heating systems, making pump maintenance and replacement more efficient for plumbers and heating engineers. Built from drop forged steel, this spanner offers the durability required for regular professional use while maintaining the dimensional accuracy needed for secure fastening work. The forged construction ensures the tool can withstand the torque demands of pump installation and removal without deformation. Ideal for plumbers working on boiler servicing, central heating installations, and pump replacements, this spanner is a practical addition to any heating engineer's toolkit. The fixed 52mm sizing eliminates the need to search for the correct adjustable spanner setting when working in tight airing cupboard spaces or confined boiler locations. Features