Do Reverse Osmosis Water Filtration Systems Use A Lot Of Electricity?

I was thinking about getting a reverse osmosis water filter for my condo. I was told that RO systems use a lot of electricity. From my understanding, RO systems use water pressure to pull the water through the filter membrane.
Do RO filters systems use a lot of electricity to pump the water through the filter membrane? Or is it just the pressure from the tap?

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Posted in: Water Systems Q & A Comments(2) August 2009


2 Responses to “Do Reverse Osmosis Water Filtration Systems Use A Lot Of Electricity?”

  1. Don Says:
    August 20th, 2009 at 11:06 am

    Reverse osmosis systems don’t use any electricity if you’re on municipal water – it’s just the pressure from the tap.
    If you have a well and pump, that’s a different story.
    Reverse osmosis does waste a lot of water, perhaps that’s what you were reading. You might get as little as one gallon of pure water out of 10 gallons of tap water, the rest goes down the drain.

  2. jodyjaw2 Says:
    August 20th, 2009 at 5:29 pm

    well you need a high pressure pump to get the water through the membrane so look up the rating on the pump motor it well say voltage,amps and watts there may be some other electronics but very little power usage and im not sure if a R.O. plant is good idea for filtration its used mostly with sea water onboard ships but i can tell you its not the cheapest way to filter
    good luck

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