I had the Aprrilaire Model 800 Steam Humidifier unit installed a little over a year ago. I am very happy with the unit except for the water valve. When it closes it makes a water hammer sound that can be heard 2 floors up from the unit. My next door neighbor complains about the same banging noise. Thank you!
We have a shock arrestor available, which is our part number 4280. Please contact your installing contractor regarding having a shock arrestor installed.
If you have any further questions regarding this or any of our products, please feel free to contact our customer service department at your earliest convenience.