Water pumps too loud - building a soundproof box - ventilation needed?

[SamandMax]

I have another pump. It is a water pump which is pumping water through a gas heater so there is CO2 produced. The pump has rubber feets but still when it is operating there is humming and vibration noise in the whole house. The Vibration is coming from pump but also from the hose and the reservoir connected to it. Does the pump give the vibrations to the reservoir??? How can I get rid of the vibrations

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