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RO System for Whole House Fresh Water

by J.D. Stevens 1997 U295 36'

This is a whole house reverse osmosis water system installed July, 2010, in a 1997 U295 36'. The hardware was purchased from the RV Water Filter Store. The installation was by the owner. The system uses two 75 gpd RO filters in series to increase the RO/effluent ratio. A pump also increases water pressure in order to increase efficiency and production rate of the system.

RO System for Whole House Fresh Water

The RO system fit into the reel bay after I removed a drawer and shelf. The shroud is removed from the fresh water tank to allow installation of the float switch and the RO water input. I replaced the shroud after the installation was complete.

The system comprises an input pump, a three stage primary filter, two stage RO filter, float switch, and control relay/valve. When the system is plugged to 120VAC, the pump runs and boosts pressure for efficiency until the float valve indicates that the fresh water tank is full. When the tank is full, the float switch causes the control relay to shut down the pump and it closes a valve to stop input water.

RO System for Whole House Fresh Water

This is a view of the input pump, 120VAC -> 24VAC transformer, and relay/valve to control input from the shore supply. I mounted the components on a piece of wood fabricated to hold the parts in good relationship to each other. The wood is on rubber feet and rests near the back of the cabinet during normal use. The pump is on rubber mounts on the wood as well. The pump is very quiet. In operation, I can only hear the pump running from inside the coach if there are no other appliances running. If it is very quiet, I can hear the water trickling into the tank during the last part of the fill. That is when the water is above the slanted part of the tank, so that water falls directly on the water in the tank rather than running down the slope into to pool.

RO System for Whole House Fresh Water

RO System for Whole House Fresh Water

© Barry Brideau 2003-2017