Clean It Up

UK Window Cleaning Forum => Window Cleaning Forum => Topic started by: jeff68 on February 17, 2009, 09:03:14 pm

Title: reverse osmosis membrane water pressure
Post by: jeff68 on February 17, 2009, 09:03:14 pm: Hi guys.Just set up my r-o system and is running(with a pump) at 110 psi.Is this normal?My membrane reads 50 gallons per day.Any advice will be greatly appreciatede.Thanx jeff
Title: Re: reverse osmosis membrane water pressure
Post by: jeff68 on February 19, 2009, 05:25:30 pm: All these window cleaners and no one can lend me any advice,shame on you!!! :'(
Title: Re: reverse osmosis membrane water pressure
Post by: Lee Pryor on February 19, 2009, 05:36:04 pm: jeff is that a 4040 ro? at that pressure 50 gallons per day must be wrong, be sure your using the right booster pump, it should not run constantly but rather cycle on and off, to account for the fact that only so much water can come out of your tap.
Title: Re: reverse osmosis membrane water pressure
Post by: jeff68 on February 19, 2009, 05:44:56 pm: thanx for reply.No its not 40/40 ro system just standard 4 stage r-o system with a built in pump.I have just got an inline tap and have turned down the inlet flow and the pressure is now 95 psi.The water coming out has a tds reading of 5.Is this o.k?
Title: Re: reverse osmosis membrane water pressure
Post by: dave0123 on February 19, 2009, 06:27:53 pm: Sounds ok to me if coming out at 5! whats your input water tds? stright from the tap
Title: Re: reverse osmosis membrane water pressure
Post by: Lee Pryor on February 19, 2009, 06:44:26 pm: 5 is good, you wont need a DI, you can clear fine with water of that purity
Title: Re: reverse osmosis membrane water pressure
Post by: jeff68 on February 20, 2009, 11:09:25 am: Quote from: dave0123 on February 19, 2009, 06:27:53 pm
Sounds ok to me if coming out at 5! whats your input water tds? stright from the tap
Yes straight from my outside tap tds reading @260.
Thanx for help guys really appreciated. :)
Also I got a 12ltr di vessel which I used to purify tap water before i got my r/o system.I have a rain water butt which i also used when its full of rain water(cut down on water costs) with a submersible pump in, but the other day I put a load of water softner tablets in the butt to soften the water before it goes through my di vesssel(dont ask why seemed a good idea at the time).But now my tds reading has gone through the roof over 700!!!And my resin seems to be contaminated.Is there a way I can get my resin back to normal again or should I throw it and re fill it back up with new resin?
Title: Re: reverse osmosis membrane water pressure
Post by: Andrew McCann on February 20, 2009, 04:56:17 pm: At 700 TDS your resin is totally spent.

You need to refill I am afraid.

Andrew
Title: Re: reverse osmosis membrane water pressure
Post by: jeff68 on February 20, 2009, 05:44:42 pm: Quote from: Andrew McCann on February 20, 2009, 04:56:17 pm
At 700 TDS your resin is totally spent.

You need to refill I am afraid.

Andrew

Thought so thanx for advice :(
Title: Re: reverse osmosis membrane water pressure
Post by: geefree on February 20, 2009, 06:05:41 pm: sorry to hijack your post, i have a 300 gpd ro-man... and im lucky that i can get my water down to 000, without a pump or resin... but i do change the 3 10" filters regular.,,, can i ask how often should i change the 3 membranes at the top? please.... i flush them regular,.... but when do these need changing anyone.... thanks.
Title: Re: reverse osmosis membrane water pressure
Post by: geefree on February 21, 2009, 03:24:30 pm: ;) bump
Title: Re: reverse osmosis membrane water pressure
Post by: john tomkins on February 21, 2009, 05:00:08 pm: I'm sure I read if you look after the membranes, flushing/ changing filters regulary, then you can get between 3 to 5 years out of them, mine are 2 1/2 years old and still going well ;D
Title: Re: reverse osmosis membrane water pressure
Post by: jonisondell on February 21, 2009, 05:09:22 pm: thats good they reccomend changing every 6 months, mine 1 year old so far im gonna change when tds goes up
Title: Re: reverse osmosis membrane water pressure
Post by: geefree on February 21, 2009, 05:19:38 pm: i have only ever changed the 10 inch filters.. in two years.. carbon etc etc... do i need to change filters in the membrane things above ?
Title: Re: reverse osmosis membrane water pressure
Post by: john tomkins on February 21, 2009, 06:33:27 pm: Quote from: Gazzasp8 on February 21, 2009, 05:19:38 pm
i have only ever changed the 10 inch filters.. in two years.. carbon etc etc... do i need to change filters in the membrane things above ?

Don't worry about it till your tds from the membranes shoot up