Clean It Up
UK Window Cleaning Forum => Window Cleaning Forum => Topic started by: colley614 on July 30, 2007, 11:00:19 pm
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Just wondering what size RO would I need if I invested in a backpack?
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If you were to fill a backpack up 16x a day that would mean you would need to be able to produce a 160ltrs of water a day.
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Right now I'm going to have to get my calculator out and convert. Unless someone has a quick answer?
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i think it depends on how many houses or windows you want to clean per day and how much money you want to spend.
Expect to use around 15 litres for a 3 bed semi with approx 12 windows or small conservatory on the back.
I use on average 250 litres per day upto 400.
I have a 300gpd ro with booster pump and this can fill 220 litre rain butt in
4 1/2 hours. Or you could get a 50gpd ro and pump water around the clock.
If finances allow it is better to get RO with more capacity than you need at the moment or at least the ability to upgrade it.
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i use 150 L a day
i run my 50 / 60 GPD RO 24 hours a day ( for each day i work plus 1 day to refill rain water butt ) into a rain water butt, then every evening i fill my 25 L containers
i work 3 days a week and startt the week off with a 210 L rain water butt full and 10 X 25 L water barrels
it does a great job, i saved enough to buy my next 50 or 60 GPD when this un has had it, i cannot see th epoint in buying a 300 GPD if you dont need it
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You are right matt, no point having what you won't need. I only use a1/4 of my capacity.
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I've a 100GPD unit,.. but pressure here is low so it produces only half that. I've just got a 950 litre static tank in the shed, and I run the unit all week, and switch it of saturday night/sunday morning when the tank is full again. I'd use anything from 150-350 litres a day, and the 100GPD unit keeps up with me. If you've decent water pressure you'd have no problem with that one, or even a smaller unit.
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okay I was looking at 100gpd last night and was thinking about using one and then maybe fitting a 1000l ibc tank in my garage. Well its supposed to be a garage but its more like a window cleaners warehouse ;D. Anyway That should do me with some 25l tanks and backpack with pole. Do I need a di Vessel to finish the job. My water pressure is massive at home.
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Get the biggest you can. There's alot to be said for just turning it on and filling up quickly, rather than waiting hours - or all day!
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Yes, you will. Check the tds after the ro but you to get 0 tds you will need di.
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Does anybody have a merlin. Would be interested in how long that would take to fill a 400ltr tank I'm about to buy. Sure it will depend on the water presure but just an estimate would be of some help.
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okay I was looking at 100gpd last night and was thinking about using one and then maybe fitting a 1000l ibc tank in my garage. Well its supposed to be a garage but its more like a window cleaners warehouse ;D. Anyway That should do me with some 25l tanks and backpack with pole. Do I need a di Vessel to finish the job. My water pressure is massive at home.
yes, RO-MAN has a small-ish di resin cylinder
http://www.ro-man.com/shop/product_info.php/cPath/33/products_id/98
its refillable with any resin ,and does a great job, 27 quid
if you buy a RO from ro-man something like this
http://www.ro-man.com/shop/product_info.php/cPath/22/products_id/258
75 GPD with a small cylinder of 250 ml DI, you will have to change the resin more often, thats why i recommend to any1 who asks to get the bigger DI above ( for 27 quid )
have it running into 1000 L tank and you will be wekk away, i doult you will ever run out of water,
if down the line you find you dont have enough water ( using a backpack you will have enough ) you can allways add a extra 75 GPD upgrade from ro-man for under 50 quid
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thanks matt I was thinking of using pure freedom for my filtration parts and bits and pieces but that site has a lot more competative prices
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get more than you need, a 200 / 300gpd they produce water quicker, and you will always expand,
why be on the limit or short if you intend getting one anyway.?
Gary.
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thats the advice I seem to be getting told a lot! so thats what I'll do
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these are great value... he also does the 200 gpd... for £109...
my water comes in below 100 tds....and this unit will bring it down to 000, and fill up your tank without effort.
http://cgi.ebay.co.uk/300GPD-REVERSE-OSMOSIS-WATER-FED-POLE-WINDOW-CLEANING_W0QQitemZ250150013393QQihZ015QQcategoryZ112579QQssPageNameZWDVWQQrdZ1QQcmdZViewItem
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would you recommend him gazza. I was looking at them. £10 postage sounds like a steal to me!!! :)
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they are very efficient and the after sales service is excellent....i have bought other items from them
yes i would recommend, i had a long chat with them and the only reason i didnt go for it was i was offered 300gpd ro man with inline tds meter and di unit and was new as a guy was packing in,
so i got it cheap....
but i was impressed and i know guys on here use them too and seem very happy.
Gary.
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Thanks mate. I will look into that soon.
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no prob... check out the post.... "Are ro-man always this slow"
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Wow looks like I will be dealing with pure freedom if thats the case
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Andrew is very helpfull, i call him yesterday to order some refills for my DI and they arrived this morning :)
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I use a 300GPD as it suits my own needs, I can not have a huge IBC as I am in a flat. So I use a slimline 100 ltr water butt, the advantage the faster water gives me is that it fills quickly (obviously) and therefore removes some of the disadvantage of my water storage being small. I can easily keep up with it and it keeps up with me. It also means I can switch the RO off, which I am more comfortable with being in a flat as I don't have top leave it running unattended as much (which I would if it was slower)
If I had space for a 250 liter container outside then I would not worry so much about this. and 100 GPD would be more than ample.
Now here is something interesting, I would prefer the 100 GPD running into a 250 Ltr Butt. The reason is the way 300 GPD systems seem to work is they are 100 GPD X 3. They feed the waste from one membrane into the next. So the TDS from a 100GPD system should be lower than a 300GPD system. Someone will correct me if this is incorrect, and maybe I will have to test the TDS of the different membranes to get a true result though.
But in saying that, a 300 GPD does get you sorted out quicker if your in need of faster water.
Make sure you get a decent DI filter. I tried a 250ml job and it was just not for me, they seem to be more prone to leaks. a big blue fire extinguisher type also wasn't for me as I couldn't figure out how to plumb it in (hozelock to thin pipe isn't my strong point) Get a 700ml one for easy fitting or higher if you do not mind the headaches of plumbing them in.
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Any difference in TDS out would be negligable between a 100 and 300 "in sequence" RO. There is one BIG difference though. WASTE WATER. On the 300 I have (Purefreedom one) I get around 1 to 1 product to waste but with a 100 it can be up to 5 parts waste to one part product. I get 97 to 98% TDS reduction from my 300 GPD ro and hardly use any resin nowadays. The best I ever got from my 4040 RO was 92%. OK I could have improved it with a booster pump and errrr regenerating my softener when I should have :-[ but its such a mess about to do this. The 300 is so easy to set up and maintain in comparison. Anyone want to buy a Kn*ckered 40 inch membrane? ;D
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yes I just did a test.
100 GPD gave me a lot of waste, and I mean loads and loads of the stuff and only a trickle of pure. The pure was 009 TDS.
300 GPD gives me about 14 TDS, so the difference is not great as far as TDS goes.
But the waste with 100 GPD was horrific, normally I produce slightly more pure than waste (using a purefreedom 300 GPD)
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what you need to do is fit a little tap on the waste pipe, turn it to about 1/4 shut, this slows the waste and speeds up the pure flow
i get about equal now using this method
i flush the membane every week and you MUST open the flow 100 % for flushing