RO System

Moore Family
of Arizona

Kitchen RO System

As part of the continued developments in the kitchen I have reworked the RO Water Filter System once again.

I have finally completed a viable under-sink water chiller and have reconfigured the system appropriately.

I've redesigned the filter cabinet on the other side of the island for better protection against leaks and have reconfigured the filter so all 4 filter cartridges and the RO element are all in the easy access cabinet. The new filter cartridge bodies are of higher quality and are transparent for easy status evaluation. I also replaced the RO element and all the valves for virtually a new system. The main shutoff valve has been mounted securely in the center top of the cabinet for easier operation too. The sensor wiring for the Water-Cop system has been added in the filter cabinet for easy access/testing - including the sensor in the filter drip pan.

The sink cabinet has been reconfigured to remove the large axial expansion tank (not needed), and the cabinet bottom has been lined in vinyl for protection (and caulked at the edges). A filtered water line (1/4") has been run in inside the existing 1/2"copper pipe to the fridge water feed. This now allows for filtered water to the icemaker & chilled water dispenser

The under sink chiller now has a direct cool air feed from below the cabinet (via hole in the cabinet bottom) and a complete reconfiguration of its electronics with a new dual stack TEC element, better heat-sinking, new temperature sensing and better tank insulation - a full rework!. It still uses the heavy duty landscape lighting power supply but with some new power conditioning add-ons.

Since the hot tank is also fed from the cold side of the waterstone filter faucet I have added some a new electronic controls to allow 3 filtered water choices: ambient temp filtered water direct from the storage tank or hot water from the instant hot tank both controlled by the Waterstone filter faucet levers and in addition chilled water via a new vacuum switch 'push to dispense' operating an electric solenoid valve.

In addition a new RO leak prevention system is based on a remote sensing of the Water-Cop Alert valve status - if the Water-Cop is off then a normally open valve immediately on top of the RO tank turns off to stop leakage from the tank - Note: the main water supply is also off.

Importantly a somewhat similar system exists on the main water supply (garage) - after the water-cop has turned off the supply - it gradually (approx 1 minute) drains off the expansion tank stored water volume & pressure via a one-way valve to limit subsequent system leakage.

This RO system is now finalized and is truly the ultimate in filtered water dispensing - featuring all the items I ever considered.

This is final configuration:

Here is th filter cabinet on the opposite side of the island from the sink - very easy access to change filters and service the RO System. The cabinet has been lined in PVC profiled to ensure any leaks end up in the leak/drip tray. The tray contains a WaterCop sensor as well as the filter wrench and captures any spilled water when changing the filter elements. It is removable allowing easy emptying and drying after use. All 4 local filter elements are now contained here instead of the last configuration with the final stage in the sink cabinet.