Clean It Up
UK Window Cleaning Forum => Window Cleaning Forum => Topic started by: keyser soze on March 16, 2013, 02:43:54 pm
-
i currently produce around 5000 litres of pure a week and the ro and pre filters knock it down to 26 to 28 depending on its mood . so you can imagine i can get through a lot of resin . my question is would it be more cost effective to produce the water to 28 into one tank and then boost it into a 2nd ro into a second tank and hopefully knock it down to 2 to 3 ?... anybody done this ?... thoughts and comments would be greatly appreciated and thanks in advance .my tap tds is 350 ish
-
Sounds like the problem is with you existing ro,
What ro is it & Why is it only taking it down to 28 ??
-
i thought that was about right . it supposed to knock it down 95 per cent which is about right
-
Your ro unit should take your water to 5 or under even from tds of 300ppm.
Something isn't right somewhere. Try a new membrane hf 4 hf5 very good. Flush your membrane for 2 days while you fill if its an option. Unlike the suggested 1hour a week
-
95% of a tds of 350 is 12/13 or less.
My tao tds is around 370 ish and the r.o takes it to 7/8 depending on how it feels.
I would say your membranes may need changing....
-
5% of 350 is 17.5, wanna do my vat return for me? ;D
-
my RO takes in at 450ppm and give out around 10ppm.
so your is definatly running high, have you tried adjusting the pure to waste tap.
if you slowly adjust your waste output higher it may give a lower pure reading.
-
you are right maybe i should boost it through my ro as my tap pressure isnt brill
-
Look at your pre filters then your ro and so on.
-
Sorry to jump in but I have a similar problem, I've owned a new 300gpd ro from PF since August. With an pre ro ppm of 250 it used to bring it down to around 10ppm but recently it has been around 21ppm. I changed the pre filters about 2 months ago, and produce about 2500L every week. My psi pre booster pump is about 45. I just don't know why it's crept up of late?
-
i find it depends on the water from the tap i'm in Dorset the water is well hard lime scale [calcium ]
so from the tap first port of call is carbon sedement filter x2 then a water softner which i backwash religosly to regenarate it then through the r/o the membrane is 3 years old also i flush the r/o out weekly
i also run 3 25l resin pots i last brought resin about 14 months ago
i dont no if this helps you but it works for me cheers sean keep um squeaky clean
-
Why do you feel the need to run 3 vessels
-
The 95% purity theory only works in an ideal situation. The further your ro is from your tap,the lower the pressure will be,hence higher Tds. If I fill up at the front of my house,tds out of ro is 6,fill up out the back and it's 84. I would suggest a pre ro boost. All this membrane changing is nonsence,I've had my current one 5 years.
-
Im using a lidl booster pump througj low pressure 4040 ionics /pure20 system .
250 in 4-6 out .
-
Your ro unit should take your water to 5 or under even from tds of 300ppm.
Something isn't right somewhere. Try a new membrane hf 4 hf5 very good. Flush your membrane for 2 days while you fill if its an option. Unlike the suggested 1hour a week
Try a new membrane? So,spend £250 and hope for the best. Flush for two days? Ffs
-
I have never flushed mine for more than ten mins , it flushes while its producing anyway .
-
Every situation is diffrent mine brings the output down to 23 today.. sometimes down to 18 nothing lower than this.. Theres nothing wrong with my membrane.
Its the fact that my water pressure is so low it is distance away from tap but i cant get around this any other way. also the water flow per min coming out of tap isnt amazing the tds of my tap water is 361 today sometimes 380 390.
Its not worth saying to him his membrane is knackered... it can be a whole host of different things! i had a long conversation with june at gaps water explaining to me the reason why it cant come down any further even with it being boosted.
But my next membrane will be the lower pressure ones :)
-
Your ro unit should take your water to 5 or under even from tds of 300ppm.
Something isn't right somewhere. Try a new membrane hf 4 hf5 very good. Flush your membrane for 2 days while you fill if its an option. Unlike the suggested 1hour a week
Try a new membrane? So,spend £250 and hope for the best. Flush for two days? Ffs
Yes 2 days!!.I flush my membrane from sat morning sunday morning to Monday morning every week. My tds in is 187 and 000 at the other end of the membrane. It also goes through 2 di vessels after the ro.my water has been 000 for 2 years now
Particles become blocked under low pressure and the only way to remove is a min of 24hr flush. I know what im talking about I used to make them in the states for 18 months 10 years ago.
-
Your ro unit should take your water to 5 or under even from tds of 300ppm.
Something isn't right somewhere. Try a new membrane hf 4 hf5 very good. Flush your membrane for 2 days while you fill if its an option. Unlike the suggested 1hour a week
Try a new membrane? So,spend £250 and hope for the best. Flush for two days? Ffs
Yes 2 days!!.I flush my membrane from sat morning sunday morning to Monday morning every week. My tds in is 187 and 000 at the other end of the membrane. It also goes through 2 di vessels after the ro.my water has been 000 for 2 years now
Particles become blocked under low pressure and the only way to remove is a min of 24hr flush. I know what im talking about I used to make them in the states for 18 months 10 years ago.
I'm struggling with that. If the TDS at the 'out' end of the membrane is 000, why do you need to put it through two DI vessels?
-
Easy ian. Its the way the system is set up. If my ro ever does go high the 2 di vessels will clean the water in time for A me to order and B the delivery and possibly delays.
My line of filters consists in this order. .tap. pre filter. Carbon pre filter. Ro. Di 11lt..di 27lt.tank.000 every time.i make 750lts of water every day.
-
Are you testing the tds before your di or after ?
-
Easy ian. Its the way the system is set up. If my ro ever does go high the 2 di vessels will clean the water in time for A me to order and B the delivery and possibly delays.
My line of filters consists in this order. .tap. pre filter. Carbon pre filter. Ro. Di 11lt..di 27lt.tank.000 every time.i make 750lts of water every day.
A minimum of 24 hrs flushing is required to reduce the TOC concentration to below 50ppb,assuming zero TOC in the feed water. This is more applicable for water to be used for drinking or food applications and on initial start up of production,not for window cleaning and not during its life span,whereas acid cleaning is required. For someone who worked in the membrane industry,don't you think your advice to 'try' a new membrane is incorrect?
-
No its sound advice.
If flushing for 2 days doesn't work then yes new membrane if he wants readings under 20 odd or whatever he said. Also he mentioned depending on what mood its in. Ro membranes are very delicate and depending on temperature and last water pass can have a dramatic effect on the membrane. If its up and down all the time only parts of the membrane are working to remove impurities. Flushing will free up more of the membrane to produce pure water.
As for your Google search..lol.. drinking water has a different filter system and could also work for window cleaning as it passes off at under 40ppm.pipes and other flow systems take it back to our tap reading we see when we measure.
Sorry to bust your bubble.
-
he also said his water pressure isnt very good though.. that also plays a big part of results
-
No its sound advice.
If flushing for 2 days doesn't work then yes new membrane if he wants readings under 20 odd or whatever he said. Also he mentioned depending on what mood its in. Ro membranes are very delicate and depending on temperature and last water pass can have a dramatic effect on the membrane. If its up and down all the time only parts of the membrane are working to remove impurities. Flushing will free up more of the membrane to produce pure water.
As for your Google search..lol.. drinking water has a different filter system and could also work for window cleaning as it passes off at under 40ppm.pipes and other flow systems take it back to our tap reading we see when we measure.
Sorry to bust your bubble.
Sorry to burst your bubble but a booster pump before ro would help considerably,before the option of a new ro. Have you ever cleaned an ro?
-
Booster pumps simply prolong the life as particles are less chance of getting stuck in the membrane. No use when they are gone or not producing low ppm. The only way is flushing as the water flows different in the membrane.
You are the weakest link...goodbye.
-
Booster pumps simply prolong the life as particles are less chance of getting stuck in the membrane. No use when they are gone or not producing low ppm. The only way is flushing as the water flows different in the membrane.
You are the weakest link...goodbye.
So,you've never cleaned an ro then.
-
Could you elaborate on that please.
I believe its a trick question.
Come on now Ann. Play fair
-
Could you elaborate on that please.
I believe its a trick question.
Come on now Ann. Play fair
How is it a trick question?
Have you ever cleaned an ro membrane?
Surely working in the ro industry 10 years ago for 18 months you would know that they can be cleaned?
-
Dnt get ahead of yourself sunshine. Ro membranes CANNOT be cleaned suitable for window cleaning. Once spent the cartridge would have to be recycled. So to answer your question. No I have not cleaned an ro.
Seems to me you didn't like getting put in your place earlier.
Never mind. Next time you try to be smart pick someone else.
-
Dnt get ahead of yourself sunshine. Ro membranes CANNOT be cleaned suitable for window cleaning. Once spent the cartridge would have to be recycled. So to answer your question. No I have not cleaned an ro.
Seems to me you didn't like getting put in your place earlier.
Never mind. Next time you try to be smart pick someone else.
Ii haven't picked on anyone,I was asking a simple question. You gave the poor advice to get a new membrane and I was giving far cheaper and practical options. I suggest you google a bit more and find that membranes can be cleaned and also can you post up a link to back up your claim of 48 hours flushing to regenerate a membrane please.
-
this is an interesting post.. if you have worked in the RO industry you weren't sure about this post you said " apparently" ??? someone who claims to know what there talking about surely would no the answer lol?
http://www.cleanitup.co.uk/smf/index.php?topic=166907.msg1403702#msg1403702
-
Luther1 you need to reply without the words ffs in your reply to gain any respect. Ie your original repost.
Unfortunately for you you have proven to at least myself that I now have no need to reply to or comment on any of your future posts.
And just for the record I dnt Google answers unlike some. Coff coff. I worked on the real things which I can clearly see has ruffled your feathers. You did ask a simple question no one is denying that but like I said bad posts and bad attitude in posts gets you no where with me.
The simple answer to this post is. Get a new membrane and flush every week for optimum performance and life span. .
-
Luther1 you need to reply without the words ffs in your reply to gain any respect. Ie your original repost.
Unfortunately for you you have proven to at least myself that I now have no need to reply to or comment on any of your future posts.
And just for the record I dnt Google answers unlike some. Coff coff. I worked on the real things which I can clearly see has ruffled your feathers. You did ask a simple question no one is denying that but like I said bad posts and bad attitude in posts gets you no where with me.
The simple answer to this post is. Get a new membrane and flush every week for optimum performance and life span. .
When you worked in the ro factory,were you the tea lady?
-
this is an interesting post.. if you have worked in the RO industry you weren't sure about this post you said " apparently" ??? someone who claims to know what there talking about surely would no the answer lol?
http://www.cleanitup.co.uk/smf/index.php?topic=166907.msg1403702#msg1403702
Hi. That is true. I can see how that could look. Please trust me though I have no reason to lie.
-
Hi. That is true. I can see how that could look. Please trust me though I have no reason to lie.
Why is your RO filter only lasting a year? i bought mine before 2008 and its still working strong its just finished producing a 1000 litres for me.
-
anyway the orginal poster has stated he has quite low pressure? so it doesnt matter if you buy a new membrane or not..he its low pressure so its not going to bring it down as low as you are thinking. and BELIVE ME I KNOW because i have a pressure of a dismal 13 psi from my tap!
-
I wasn't aware you could clean an RO other than a flush, well tell a little lie i have popped the membrane out and wiped over the exterior of it and give the housing a rinse out. Is that the same or can you clean it another way ?
-
I wasn't aware you could clean an RO other than a flush, well tell a little lie i have popped the membrane out and wiped over the exterior of it and give the housing a rinse out. Is that the same or can you clean it another way ?
You can buy a proper membrane cleaning acid/solution
-
Booster pumps simply prolong the life as particles are less chance of getting stuck in the membrane. No use when they are gone or not producing low ppm. The only way is flushing as the water flows different in the membrane.
You are the weakest link...goodbye.
A booster pump also lowers the tds and the amount of waste water, I know this from practical experience within the last week .
-
interesting replies .. the membrane performs the same as when i first installed it . i have an online tds meter straight after the ro and again after the resin. and its never been any different . so can only presume it needs a boost.. the reason i asked is ive just acquired a second ro which is a good one and wondered if i could use it and would it work so i need not buy resin . i will try flushing for longer (good tip)
-
anyway the orginal poster has stated he has quite low pressure? so it doesnt matter if you buy a new membrane or not..he its low pressure so its not going to bring it down as low as you are thinking. and BELIVE ME I KNOW because i have a pressure of a dismal 13 psi from my tap!
13 o my gaaaad. Thats low. Cnt u turn it up in the street stopcock?
-
Tap water pressure is determined by how far you are from the nearest pumping station and the size of the water main , the street stop cock should be fully open .
-
13 o my gaaaad. Thats low. Cnt u turn it up in the street stopcock?
My stop cock is fully open this has already been done many years ago. I probably would get a little bit better PSI if i moved the ro closer to the tap but i cant due to where its placed and where the underground pipe comes into the house, i was getting my ppm down to about 30 before a booster pump and now when running my pump at around 62 psi about 50/50 its runs smoothly at settles down to 17 last night out of the RO after running for a short while.
Its a real pain in the backside i know but there's not much i can do.. my next membrane will be a low pressure one obv but this has lasted quite a long time i am pleased.
-
so im after a cheap booster pump for a ro .. any links guys
-
when you flush the RO, do you have to flush the pre filters too?
-
so im after a cheap booster pump for a ro .. any links guys
The one from lidl is a bargain and works well with a three year guarantee , might be a few left if your lucky as it was last week's offer.
50 quid