Clean It Up
UK Window Cleaning Forum => Window Cleaning Forum => Topic started by: mark blundell on January 28, 2011, 10:06:46 pm
-
if so could you answer a few questions for me
1 the water comes out of pre filter into R/O and waste goes into R/O 2 is there a tap in-between to keep pressure up.
2 how do I set the waste/pure ratio
cheers mark
-
try mike cam m8
sure he as a twin 40 40 cud be wrong ;)
-
cheers Gav hopefully he might see this post and be able to help.
i'm going to go out there and start mounting it all soon so with a bit of luck i will get some reply's
cheers
-
steve_cm runs twin 4040's mate.
-
Mark
I have twins and really i never saw the massive benefit until i added a booster pump. If your pressure is low you will probably be only getting 20% ish pure water. 80% waste. Since adding the booster pump i think i'm getting nearer 50-50 and my produxtion has gone up to about 300 - 400 litres an hour. It runs the system so much more efficiently. So as for your quetion of where to set it will be down to your water pressure
If you take the waste feed of 1 then stick it straight into 2 you will only need the tap set out of the numbers 2's waste.
-
Mark
I have twins and really i never saw the massive benefit until i added a booster pump. If your pressure is low you will probably be only getting 20% ish pure water. 80% waste. Since adding the booster pump i think i'm getting nearer 50-50 and my produxtion has gone up to about 300 - 400 litres an hour. It runs the system so much more efficiently. So as for your quetion of where to set it will be down to your water pressure
If you take the waste feed of 1 then stick it straight into 2 you will only need the tap set out of the numbers 2's waste.
interested in this post, maybe I'm wrong but is that the correct way to set up twin ro's, wont the second one get knackered more quickly with a higher cocentrate of waste going through it ?
CM I'm just running a single hf5 at the moment, from your experience then if I was just to do one upgrade which do you think would be better, a second ro or a booster pump?, my psi is about 50 and mains tds of about 260 ppm
thanks, simon
-
jus txted mike cam he will
explain this well ;D ;D
-
Mark
I have twins and really i never saw the massive benefit until i added a booster pump. If your pressure is low you will probably be only getting 20% ish pure water. 80% waste. Since adding the booster pump i think i'm getting nearer 50-50 and my produxtion has gone up to about 300 - 400 litres an hour. It runs the system so much more efficiently. So as for your quetion of where to set it will be down to your water pressure
If you take the waste feed of 1 then stick it straight into 2 you will only need the tap set out of the numbers 2's waste.
interested in this post, maybe I'm wrong but is that the correct way to set up twin ro's, wont the second one get knackered more quickly with a higher cocentrate of waste going through it ?
CM I'm just running a single hf5 at the moment, from your experience then if I was just to do one upgrade which do you think would be better, a second ro or a booster pump?, my psi is about 50 and mains tds of about 260 ppm
thanks, simon
Its the way gaps water recommended i set them up.
I have had one membrane for nearly 4 years and the other for 3 years. Both HF5's i back flush them for 5 minutes or so before every fill up as otherwise the tds coming out the ro's are always high for the first few minutes which wastes my resin.
I know ian window washers has the same set up as me but with only one 4040 he is only getting about 100 litres an hour. i used to get 100 litres an hour from my twin ro unpumped.
I don't know my tap pressure as i don't have anything to read it but can only talk from my own experience.
-
Mark
I have twins and really i never saw the massive benefit until i added a booster pump. If your pressure is low you will probably be only getting 20% ish pure water. 80% waste. Since adding the booster pump i think i'm getting nearer 50-50 and my produxtion has gone up to about 300 - 400 litres an hour. It runs the system so much more efficiently. So as for your quetion of where to set it will be down to your water pressure
If you take the waste feed of 1 then stick it straight into 2 you will only need the tap set out of the numbers 2's waste.
interested in this post, maybe I'm wrong but is that the correct way to set up twin ro's, wont the second one get knackered more quickly with a higher cocentrate of waste going through it ?
CM I'm just running a single hf5 at the moment, from your experience then if I was just to do one upgrade which do you think would be better, a second ro or a booster pump?, my psi is about 50 and mains tds of about 260 ppm
thanks, simon
We haven't a 40/40 but this is interesting. When we got our 300gpd, 3 membrane R/O unit, all three membranes were linked together in parallel with the restrictor on the waste outlet 'serving' all 3.
I would suggest that you could couple your 2 40/40's together in this way so they are 'balanced' and served by the one adjustable waste tap.
I have seen an R/O supplier who linked the membranes in series, so the waste from the first becomes the input for the second etc. This is supposed to reduce water consumption. I did ask the question regarding membrane longevity when linked this way, but never got a definitive answer. The stress was put on the water savings for those on a water meter which would easily negate the costs of having to replace the membranes sooner, if this was infact the case at all.
I don't know whether the same is strickly true for a more expensive 40/40 membranes though.
Spruce
-
I'd set it up as steve CM says. Waste from first one going into the next one and only one waste tap needed. And look for a product/waste ratio of near 50/50.
-
Mark
I have twins and really i never saw the massive benefit until i added a booster pump. If your pressure is low you will probably be only getting 20% ish pure water. 80% waste. Since adding the booster pump i think i'm getting nearer 50-50 and my produxtion has gone up to about 300 - 400 litres an hour. It runs the system so much more efficiently. So as for your quetion of where to set it will be down to your water pressure
If you take the waste feed of 1 then stick it straight into 2 you will only need the tap set out of the numbers 2's waste.
interested in this post, maybe I'm wrong but is that the correct way to set up twin ro's, wont the second one get knackered more quickly with a higher cocentrate of waste going through it ?
CM I'm just running a single hf5 at the moment, from your experience then if I was just to do one upgrade which do you think would be better, a second ro or a booster pump?, my psi is about 50 and mains tds of about 260 ppm
thanks, simon
I'd think you should be looking at a booster pump. It will produce better quality water and faster.
-
STEVE CM
where did you get your booster pump , how much was it and how easy was it to fit to your setup?
-
cheers for all the input guys.
still not plumbed in yet been driving round most of the day trying to get fittings so i have given up till monday.
i have a shop near me that sells everything they specialize in Irrigation equipment – Garden – Landscape – Environmental i got all my van port fittings there really cheap too 1/4 bsp to 15mm hose elbow 28p £1.50 + p+p on ebay
a great place for fittings.
as for pressure they are low pressure membrane's it says on the side max 130 psi
so my water pressure of 100 psi should be great for them without the need of a pump.
i will have to wait till monday now :(
-
STEVE CM
where did you get your booster pump , how much was it and how easy was it to fit to your setup?
i have this
http://cgi.ebay.co.uk/Clarke-CBM240E-Multi-stage-Domestic-Water-Pump-Booster-/230569893889?pt=LH_DefaultDomain_3&hash=item35af096001#ht_602wt_1135
I bought mine second hand on ebay. i can't remember how much it was but i think it was around a hundred quid. It had only been used a handful of times, not missed a beat and is bang on!
-
was just looking through older posts and seen this one - we use a twin 4040 but they are fed parallel, we get approx 600ltrs an hour.
-
was just looking through older posts and seen this one - we use a twin 4040 but they are fed parallel, we get approx 600ltrs an hour.
Thats brilliant. That work out to 10 litres a minute production. Even given a waste ratio of 50/50 that means 20litres a minute coming from your supply. If yours are parallell them the waste will be higher. I wouldn't think thats typical though by a long shot.