Premier WP4-V Reverse Osmosis System

Pro: The system works and the monitoring faucet provide a easy way for filtered water.

Con: water leaks when the tank is near empty (when the tank is filled, no more water leaking)

Other thought: do not draw to much filtered water (2.5 gallon) at a time.

Reverse osmosis is based upon your existing water line pressure. I have decent water line pressure in city of San Jose, not too low, not too high, but when using this WP4-V, very little water would come out. So I had to buy an extra retrofit pump from watts premier, only to find out it''s not for this new type of RO system, only the traditional 5 stage with the tubings sticking out of the 4 and 5 stage filters. Undaunted, I hook up the pump to prefilter line, install the sensor at the output line, and it works! But not after a lot of frustration and cursing. My advise: don''t get the WP4-V or WP5-50, go for the traditional RO system just in case you need that pump, it''s better to get the model with the water pump anyway and enjoy steady RO pure water.

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