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collins82002

  • Posts: 357
300gpd R/O unit issue
« on: March 14, 2009, 07:46:26 pm »
Is there any way of increasing the production of pure water cause at the moment it dribbles out and it on a booster pump too. any ideas

mileslake

Re: 300gpd R/O unit issue
« Reply #1 on: March 14, 2009, 08:23:29 pm »
Stick 3 X 150gpd membranes in. Plus new flow controllers is what I am going to do shortly. Check with a technical expert first though.

NWH

  • Posts: 16952
Re: 300gpd R/O unit issue
« Reply #2 on: March 14, 2009, 08:27:07 pm »
Get a 40x40,i turned my new HF5 on the other day just to set it up and flush it before i use it to make water next week and even without messing about with the waste valve yet to increase production i was getting over a litre a minute at just 30psi.

tonylee

Re: 300gpd R/O unit issue
« Reply #3 on: March 14, 2009, 08:31:53 pm »
Chris,
Did you buy it new or second hand, if the later change all the filters and also the flow restrictor.
Watch ya Miles

jonisondell

Re: 300gpd R/O unit issue
« Reply #4 on: March 14, 2009, 10:19:52 pm »
hi chris,
is it new second hand? what is the output tds??
if the output slightly less than the waste then its ok.
have you got the flush tap on waste flow will be high.
what booster pump have you got?
also the inline tds meter is rubbish dont believe the reading its not 000, get a had held meter

collins82002

  • Posts: 357
Re: 300gpd R/O unit issue
« Reply #5 on: March 15, 2009, 09:37:18 am »
It is second hand,  The TDS before is 270 and the output is 50.
I use a and held TDS meter. Have flushed it out for 1/2 hour .
The waste fully open and the waste pours out when i completly close is i only get a dribble of pure.
There is a booster pump on it of 120psi even with it on it dribbles out, i can pi## quicker.

jonisondell

Re: 300gpd R/O unit issue
« Reply #6 on: March 15, 2009, 09:52:24 am »
hi collins output tds not right you should be getting single figures would say the filters need changing just top ones.
have you got correct pump? is it in the correct position, try producing water without pump see what tds and flow.
as a general rule the output water flow is slightly less than the waste.

dd

  • Posts: 2623
Re: 300gpd R/O unit issue
« Reply #7 on: March 15, 2009, 10:06:41 am »
As it is a 2nd hand unit you may need to change pre-filters and membranes. The performance is dire, should be good with your booster pump.

IMO 2nd hand units tend to be a false economy for this reason. Sorry.

Ian W

  • Posts: 1161
Re: 300gpd R/O unit issue
« Reply #8 on: March 15, 2009, 10:28:43 am »
I was getting 50 tds out of the membrane on my 100gpd. Changed filters, but still no difference. Changed membrane and the tds went straight down to 5.
Do all the good you can, and make as little fuss about it as possible.
Charles Dickens

dd

  • Posts: 2623
Re: 300gpd R/O unit issue
« Reply #9 on: March 15, 2009, 10:38:09 am »
I was getting 50 tds out of the membrane on my 100gpd. Changed filters, but still no difference. Changed membrane and the tds went straight down to 5.
Was that a ro-man unit. I get tds of around 007, input 185. Just rely on mains pressure of 55psi. (300 gpd unit)

jonisondell

Re: 300gpd R/O unit issue
« Reply #10 on: March 15, 2009, 10:41:00 am »
that sounds right, wouldnt change pre filters bottom, change manbranes first top, as thay filter most impuritys, what make ro is it??
i get 004 from 290 from my ro man.

mark dew

  • Posts: 2901
Re: 300gpd R/O unit issue
« Reply #11 on: March 15, 2009, 12:14:14 pm »
tds before my 300gpd is 480ppm. It comes out at 7 using a booster pump. Without it is around 28.
Your output is very poor.

You will probably need new filters anyway. so you should try new filters 1st because they may be the cheaper fix. And if that didn't work then buy membranes.
Is there any way of increasing the production of pure water cause at the moment it dribbles out and it on a booster pump too. any ideas

When you say dribble, how long does it take to produce 1 litre of pure? 
Mine takes around a minute and a half.

jonisondell

Re: 300gpd R/O unit issue
« Reply #12 on: March 15, 2009, 12:31:56 pm »
hi mark no  thats wrong, pre filters bottom filter dont really filter that much its the membrains top filters that do most filtering they need changing first

Ian W

  • Posts: 1161
Re: 300gpd R/O unit issue
« Reply #13 on: March 15, 2009, 12:53:46 pm »
I was getting 50 tds out of the membrane on my 100gpd. Changed filters, but still no difference. Changed membrane and the tds went straight down to 5.
Was that a ro-man unit. I get tds of around 007, input 185. Just rely on mains pressure of 55psi. (300 gpd unit)

Yes, ro-man unit. I should mention that I use a booster pump. With water pressure around 25psi the tds is 12.
Do all the good you can, and make as little fuss about it as possible.
Charles Dickens

Window Washers

  • Posts: 9036
Re: 300gpd R/O unit issue
« Reply #14 on: March 15, 2009, 02:44:56 pm »
It is second hand,  The TDS before is 270 and the output is 50.
I use a and held TDS meter. Have flushed it out for 1/2 hour .
The waste fully open and the waste pours out when i completly close is i only get a dribble of pure.
There is a booster pump on it of 120psi even with it on it dribbles out, i can pi## quicker.
Change all the membranes and filters, 50 out and dribbling says to me it is shagged/clogged up/dead
If your not willing to learn, No one can help you, If you are determined to learn, No one can stop you ;)

NWH

  • Posts: 16952
Re: 300gpd R/O unit issue
« Reply #15 on: March 15, 2009, 09:19:51 pm »
All these types of RO`s are for producing water for fish tanks or drinking,you can`t complain about bad output and quality of water as there not designed to produce so much water.The pre filters and membranes won`t last long enough for WC i would get yourself a 40x40 and tkae all the hassel out of making water.

jonisondell

Re: 300gpd R/O unit issue
« Reply #16 on: March 15, 2009, 10:18:58 pm »
these are very suitable for window cleaning, and there are many window cleaners using these, they produce up to 450gpd over 2000 litres
menbrains dont last??, ive had mine over a year still 004, ive heard people have membrains over 3 years old
very stupid statment

NWH

  • Posts: 16952
Re: 300gpd R/O unit issue
« Reply #17 on: March 15, 2009, 10:22:11 pm »
these are very suitable for window cleaning, and there are many window cleaners using these, they produce up to 450gpd over 2000 litres
menbrains dont last??, ive had mine over a year still 004, ive heard people have membrains over 3 years old
very stupid statment
I would have to leave it on 24 HOURS A DAY for it to make enough water,with a 4ox40 i can fill in the morning come back about 4-5 hours later with nearly another 1000ltrs worth of working water.

jonisondell

Re: 300gpd R/O unit issue
« Reply #18 on: March 15, 2009, 10:36:59 pm »
its collins82002 that has the ro man with the problem that everybody is trying to help

im sure hes not interested that if you had a ro man youd have to leave it on 24 hrs a day

yes 4040 very quick for water production very expensive, but they dont suit every situation

collins82002

  • Posts: 357
Re: 300gpd R/O unit issue
« Reply #19 on: March 15, 2009, 10:52:52 pm »
Thanks all,

Will look into getting filter changes tomorrow and see how things progress