Valves, fittings, and couplers control where solution flows and how much. When they leak, the machine puts water where you didn't want it. When they clog or stick, the machine doesn't put water where you did want it. Either way, coverage suffers and the floor tells on you.
This is the genuine Nilfisk Advance OEM VALVE BODY BEXT WAND/TOOL, part number 52544A, brand new in the box. Genuine parts seal right, meter right, and thread into the same fittings the rest of your system uses. Aftermarket "close enough" fittings are how small leaks start.
If flow's uneven, or you're seeing dry stripes in your solution pattern, look at the valves and fittings before you tear into the pump.
Not sure this is the right part for your machine? Send us the model and serial and we'll get you the right one.