Originally Posted by TN Barefooter
That pump is almost identical to the ones used on field sprayers. Tractor supply probably has the same pump, but I'm sure it will be more expensive at TSC than off the Internet. The ones on sprayers are very loud.
It's identical with pumps used on RV's for pressurizing the internal water supply (sinks, shower, etc). In that sense, it's pretty quiet - you'll know it's running, but you'll certainly have no problems talking while it is.