Brass Pump Valve Plug M24x1.5 SW22

Valve plug with M24x1.5 thread, with an internal R1/4" port allowing a pressure gauge to be connected. Occupies one of the valve positions in the AQ-type valve block.

Application

The plug closes one of the valve positions on the pump's valve block, while providing an R1/4" port for screwing in a pressure gauge that monitors working pressure. The remaining positions are fitted with plain plugs without a hole (M24x1.5, MPN 42.026).

Symptoms – when to replace

• Water leak at the M24x1.5 thread where the plug seats in the valve block.
• Leak at the connection between the pressure gauge and the R1/4" port, despite the gauge being properly tightened.
• The thread on the plug or port is worn and the part cannot be tightened fully.
• Visible corrosion or cracking of the plug body after prolonged use.

How to choose the right part

Selection is based on reference number 420262 – the plug is used in the same role across several different product lines sharing the common AQ valve block, so the catalog number is a more reliable reference than the model name alone.

When ordering, confirm whether the gauge on your unit is fitted directly into this plug, or whether the gauge position is blanked off with a plain plug without a port.