Thor Forums

[Thehobe1]

The ones delivered with RV's tend to be very loud. There are replacements that claim to be quieter. The water pumps are normally rubber shock mounted so you could remove the pump and wrap it with some insulation but most of the noise is being transferred through the mounting bolts so stiffening the board that the unit is mounted on may help. Sometimes these are mounted on a 1/8' paneling that acts as a resonator so if you add say a heavy piece of metal (or 1" thick plywood) under the unit passing the mounting bolts through it will lessen the resonant effect.
If someone has replaced their water pump with a claimed "quieter" unit, please send the model number and manufacturer and your results; that would be useful to all RV owners.