Remember, your system is only as good as its weakest part. I nlet valves are extremely important. They should be durable, non-leaking and attractive. Make sure that the gasket is located on the door and will flex forward to seal if the valve is over tightened or the wall is uneven. If you have selected the electric power nozzle make sure the electrical 110 Volt power is located in the inlet valve itself or you will require an extension cord which is inconvenient and potentially hazardous.
M ake sure the power unit is located away from the living area to isolate the sound.
When installing in existing homes there are occasions that require inlets to be installed on the floor or to have pipes exposed behind walls. But in almost all cases the valve should be located inside the wall with the pipe. M ost companies have units with different power levels. The top of the line units from most companies have about the same amount of power. The extra power will be appreciated when cleaning your car or hard surfaces.