334265 Diaphragm Pressure Damper

Diaphragm for pulsation dampener on Hardi 3-cylinder pumps. Diaphragm used could be 334265 (yellow) or 240122 (black). They are not interchangeable. The yellow diaphragm is an update to the black one but it will not fit into the old-style housing.
Always open the pulsation dampener and verify what colour the diaphragm is before ordering.

After installing the diaphragm start the sprayer. The pump will vibrate. Use an air compressor to pressurize the pulsation dampener until the vibration disappears.