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  1. #1
    Senior Member
    Join Date
    Sep 2003

    Changing filters on Aquasafe R/O unit

    This may fall into the dumb question category but: when changing the filters on an R/O unit (I have the one from Aquasafe), how do you release the pressure inside the unit to prevent water spraying all over the place when the filters are unscrewed?

  2. #2
    Former Moderator swiseman's Avatar
    Join Date
    Apr 2005
    You could turn the flow valve that sits above the first filter. I would imaging that disconnecting it from the water source would also do it. That is probably not an option if you used the needle piercing valve on a copper pipe.
    If my wife asks, it was only $20.

    220 Gal Mostly SPS Reef, 66 gal sump with refuge, 33 gal refugium, Gen-X Mak-5 Return, 3 x IceCap 250 MH, 2 x 110 VHO, Deltec APF600 Skimmer and a Deltec AP-600, Geo 6-18 Calcium Reactor, 2 x Tunze Stream 6100, Profilux Plus II EX Controller.

  3. #3
    Senior Member
    Join Date
    Nov 2005
    You should always install these units with a shut off valve before the unit. A simple john guest shut off is easy enough to instal and cheap too. Then just turn the valve off and remove the unit.

  4. #4
    Senior Member
    Join Date
    Sep 2003
    But, shutting off that value won't release the pressure which has built-up inside the filter compartments, will it? I've tried shutting off the in-flow value and draining the unit by opening the out-flow value but I still get sprayed with water when I unscrew the filters

  5. #5
    Moderator mike536's Avatar
    Join Date
    Jun 2004
    Do what Swiseman said. Release the black handle just over the 3 filter tubes. I think it's the menbrane flush. That will do the trick.
    Mike Philpott

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