Clean It Up

UK Window Cleaning Forum => Window Cleaning Forum => Topic started by: collins82002 on March 14, 2009, 07:46:26 pm

Title: 300gpd R/O unit issue
Post by: collins82002 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
Title: Re: 300gpd R/O unit issue
Post by: mileslake 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.
Title: Re: 300gpd R/O unit issue
Post by: NWH 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.
Title: Re: 300gpd R/O unit issue
Post by: tonylee 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
Title: Re: 300gpd R/O unit issue
Post by: jonisondell 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
Title: Re: 300gpd R/O unit issue
Post by: collins82002 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.
Title: Re: 300gpd R/O unit issue
Post by: jonisondell 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.
Title: Re: 300gpd R/O unit issue
Post by: dd 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.
Title: Re: 300gpd R/O unit issue
Post by: Ian W 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.
Title: Re: 300gpd R/O unit issue
Post by: dd on March 15, 2009, 10:38:09 am
Quote from: Ian W 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.
Was that a ro-man unit. I get tds of around 007, input 185. Just rely on mains pressure of 55psi. (300 gpd unit)
Title: Re: 300gpd R/O unit issue
Post by: jonisondell 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.
Title: Re: 300gpd R/O unit issue
Post by: mark dew 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.
Quote from: collins82002 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

When you say dribble, how long does it take to produce 1 litre of pure? 
Mine takes around a minute and a half.
Title: Re: 300gpd R/O unit issue
Post by: jonisondell 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
Title: Re: 300gpd R/O unit issue
Post by: Ian W on March 15, 2009, 12:53:46 pm
Quote from: dd on March 15, 2009, 10:38:09 am
Quote from: Ian W 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.
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.
Title: Re: 300gpd R/O unit issue
Post by: Window Washers on March 15, 2009, 02:44:56 pm
Quote from: collins82002 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.
Change all the membranes and filters, 50 out and dribbling says to me it is shagged/clogged up/dead
Title: Re: 300gpd R/O unit issue
Post by: NWH 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.
Title: Re: 300gpd R/O unit issue
Post by: jonisondell 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
Title: Re: 300gpd R/O unit issue
Post by: NWH on March 15, 2009, 10:22:11 pm
Quote from: jonisondell 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
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.
Title: Re: 300gpd R/O unit issue
Post by: jonisondell 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
Title: Re: 300gpd R/O unit issue
Post by: collins82002 on March 15, 2009, 10:52:52 pm
Thanks all,

Will look into getting filter changes tomorrow and see how things progress
Title: Re: 300gpd R/O unit issue
Post by: karygate on March 16, 2009, 06:53:21 am
hi chris th tds in at mine is 270 the same and out at 10 to 15 and that is without a booster pump. it may be just 1 of your membranes gone. check them individually.
Title: Re: 300gpd R/O unit issue
Post by: collins82002 on March 16, 2009, 11:14:09 am
How can you check to see if there knackered?
Title: Re: 300gpd R/O unit issue
Post by: jonisondell on March 16, 2009, 12:12:16 pm
i doubt it very much its just 1, because they have been in there the same time,
you could dissconect the outputs of each menbrain look for reduced flow and test tds each membrain
from what youve said its def the membrains just change them will be like new
Title: Re: 300gpd R/O unit issue
Post by: D B Services on March 16, 2009, 12:53:42 pm
Clogged pre filters can also cause low output so it may not be the membranes.

I know because it has happened to me in the past. I bought a new 40 inch membrane costing well over £200 and replaced the old one and there was no improvement. Then I spent £20 ish on a set of new filters and it worked a treat. So lesson learned.

I would never buy a 2nd hand RO because you have no idea of how good the filters and membranes are. You can buy a decent new 300 GPD one for under £130.00 nowadays.

I would try taking each of the prefilters out and run the RO to see what happens. Running it for a few minutes won't really harm it. You have nothing to lose by trying this.

Try it. I hope it is just the prefilters.

Dan
Title: Re: 300gpd R/O unit issue
Post by: collins82002 on March 16, 2009, 08:22:24 pm
Got my RO unit Working got the tds from 280 down to 005 just through the R/O unit with the help of Gary,  Cheers dude.
But my new tds meter has packed up what a s##t cause i got my di vessel and pump coming tomorrow..
Title: Re: 300gpd R/O unit issue
Post by: jonisondell on March 16, 2009, 08:42:26 pm
i got one for sale 3 months old, 10 pluss postage jonisonvespa@yahoo.co.uk
Title: Re: 300gpd R/O unit issue
Post by: collins82002 on March 16, 2009, 11:21:14 pm
Thanks jonisondell i will bear that in mind but i have fixed it now thanks
Title: Re: 300gpd R/O unit issue
Post by: karygate on March 17, 2009, 07:03:55 am
is that without the pump chris.
Title: Re: 300gpd R/O unit issue
Post by: dd on March 17, 2009, 07:02:46 pm
Quote from: collins82002 on March 16, 2009, 08:22:24 pm
Got my RO unit Working got the tds from 280 down to 005 just through the R/O unit with the help of Gary,  Cheers dude.
But my new tds meter has packed up what a s##t cause i got my di vessel and pump coming tomorrow..
Pleased you got it working. How did you fix it?
Title: Re: 300gpd R/O unit issue
Post by: collins82002 on March 17, 2009, 09:57:25 pm
visited a guy gary on here who gave me advise and help,  Had some new membranes come today so i changed them got the tds down to 003 and producing a litre of tds 000 every 90 seconds with the booster so now filling my 1000l IBC tank.  Have ply'd and seal van so tomorrow will fit & fill tank and fit pump and controller and give it a blast.   Also made my DIY harris pole today well chuffed all in all.  The best thing was went to a garden centre after picking up my leisure battery at a bargin of £70 for a 110ah to get submersable pump for IBC tank and told the bloke what it was for and he asked for a business card cause the aint got a W/C so brill.

So to everyone who has help me with problems and advise I owe a HUGE thanks cause its all come together now
;D ;D ;D ;D ;D ;D ;D ;D ;D ;D ;D ;D ;D ;D ;D ;D ;D ;D ;D ;D ;D ;D ;D ;D ;D ;D ;D ;D ;D ;D