[Carl@Cwc]

Hi people
Just checked my water quality and I'm at 001ppm.
Now I added a 2nd di vessel to my setup 2 months ago (11ltr)

Currently tap tds is 250 ppm
After 20" sedi/carbon and 4040 ro it's at 067ppm

Now my membrane is 12 months old and I replace 2 filters regularly.
& I use 2000+ ltrs per week.

Is this an acceptable ppm after RO or do u think it needs replacing
Or is it just I need to change resins?...

Advice greatly appreciated

[lozsing]

I am lead to believe your 40/40 ro should reduce your tds to 10 % of input so if your tap water was 300 should come out of ro at 30

[lozsing]

Your ro membrain should last between 3. To 5 years depending on how you look after it. Re flushing etc

[Carl@Cwc]

I flush it weekly for 20 mins

[CLEANCARE WC]

I would say thats a crap tds after ro. I have a 300gpd ro with booster pump from vyair and it produces between 003 and 009 BTW MY TAP TDS IS +400! 

[colley614]

Sorry to hi-jack the thread but can you flush a merlin?

[Window Washers]

Sorry to hi-jack the thread but can you flush a merlin?

Merlin puts 4 litres of water
to drain for every 1 litre of product. This is already a high flushing velocity if you need to flush it I would look to get a 4040 less wate less hassle and fatser filling time.

[Carl@Cwc]

Sorry to hi-jack the thread but can you flush a merlin?

Merlin puts 4 litres of water
to drain for every 1 litre of product. This is already a high flushing velocity if you need to flush it I would look to get a 4040 less wate less hassle and fatser filling time.

do u think my membranes knackered m8??

ive just done the prefilters ( 5 mins ago and put it on flush for rest of night.)
so i can check it in the morning

looking at price of vyair systems they are as cheap as a new 4040 filter???

[Window Washers]

Sorry to hi-jack the thread but can you flush a merlin?

Merlin puts 4 litres of water
to drain for every 1 litre of product. This is already a high flushing velocity if you need to flush it I would look to get a 4040 less wate less hassle and fatser filling time.

do u think my membranes knackered m8??

ive just done the prefilters ( 5 mins ago and put it on flush for rest of night.)
so i can check it in the morning

looking at price of vyair systems they are as cheap as a new 4040 filter???

buy cheap but twice imo, I have had 4040 from the start, I now see other on here that were talked out of it now moaning about the very same thing, just get one you will not be sorry and in your business you can consentrate on making more money. your water bill will also go down 

[Carl@Cwc]

get what m8???

a new 4040 membrane or a vyair system?

[rosskesava]

Sorry to hi-jack the thread but can you flush a merlin?

As per the other posting you don't need to flush a merlin however..... unless you use the merlin at least once a day, you should run it for a good few minutes and let the water go down the drain before connecting to the di. This flushes the salts that build up in the membranes.

If you take a tds reading as soon as you turn it on, you'll notice the reading is very high. Take it a few minutes later and it'll have dropped right down.

[Window Washers]

Sorry to hi-jack the thread but can you flush a merlin?

As per the other posting you don't need to flush a merlin however..... unless you use the merlin at least once a day, you should run it for a good few minutes and let the water go down the drain before connecting to the di. This flushes the salts that build up in the membranes.

If you take a tds reading as soon as you turn it on, you'll notice the reading is very high. Take it a few minutes later and it'll have dropped right down.

thats the same with all ro's same happens on 4040.

I meant a 4040 Carl   when you put on new filters the tds will rise anyway, so could well be them, I guess you have flushed them without the ro connected any as this could damage it (and dont worry oif you have , just remember for next time.

I would check over the next few fills and keep an eye on it, if it keep rising daily then you need new membrane

[Carl@Cwc]

Sorry to hi-jack the thread but can you flush a merlin?

As per the other posting you don't need to flush a merlin however..... unless you use the merlin at least once a day, you should run it for a good few minutes and let the water go down the drain before connecting to the di. This flushes the salts that build up in the membranes.

If you take a tds reading as soon as you turn it on, you'll notice the reading is very high. Take it a few minutes later and it'll have dropped right down.

thats the same with all ro's same happens on 4040.

I meant a 4040 Carl 

thx ianww
wil phone june at gaps or doug at daqua  in the morning

[Window Washers]

Sorry to hi-jack the thread but can you flush a merlin?

As per the other posting you don't need to flush a merlin however..... unless you use the merlin at least once a day, you should run it for a good few minutes and let the water go down the drain before connecting to the di. This flushes the salts that build up in the membranes.

If you take a tds reading as soon as you turn it on, you'll notice the reading is very high. Take it a few minutes later and it'll have dropped right down.

thats the same with all ro's same happens on 4040.

I meant a 4040 Carl 

thx ianww
wil phone june at gaps or doug at daqua  in the morning

no probs, but read the post above as I added a little to it, could well save you un needed spend 

[Carl@Cwc]

Sorry to hi-jack the thread but can you flush a merlin?

As per the other posting you don't need to flush a merlin however..... unless you use the merlin at least once a day, you should run it for a good few minutes and let the water go down the drain before connecting to the di. This flushes the salts that build up in the membranes.

If you take a tds reading as soon as you turn it on, you'll notice the reading is very high. Take it a few minutes later and it'll have dropped right down.

thats the same with all ro's same happens on 4040.

I meant a 4040 Carl   when you put on new filters the tds will rise anyway, so could well be them, I guess you have flushed them without the ro connected any as this could damage it (and dont worry oif you have , just remember for next time.

I would check over the next few fills and keep an eye on it, if it keep rising daily then you need new membrane

ill get a bag of resin in the morning to amend the crap TDS and keep my eye on the RO output in the next couple of days.
thx for your time m8

[colley614]

Thanks for the Merlin advice guys. I used to flush my old Ro system for 10 minutes every time I used it. With this Merlin I was beginning to worry. I've also got a 40/40 membrane in my garage that I found bolted to an old window cleaning trolley dumped in a skip.

[Carl@Cwc]

Sorry to hi-jack the thread but can you flush a merlin?

As per the other posting you don't need to flush a merlin however..... unless you use the merlin at least once a day, you should run it for a good few minutes and let the water go down the drain before connecting to the di. This flushes the salts that build up in the membranes.

If you take a tds reading as soon as you turn it on, you'll notice the reading is very high. Take it a few minutes later and it'll have dropped right down.

thats the same with all ro's same happens on 4040.

I meant a 4040 Carl   when you put on new filters the tds will rise anyway, so could well be them, I guess you have flushed them without the ro connected any as this could damage it (and dont worry oif you have , just remember for next time.

I would check over the next few fills and keep an eye on it, if it keep rising daily then you need new membrane

well to my suprise i left the RO on flush overnight. went and cleaned with 001ppm.

flushed membrane again tonight and its giving me 027ppm

added a spare di at end as first is 10ppm/ 2nd is 1ppm and 3rd is new resin = 000ppm

interesting point given today by cleaning warehouse was there van mounts are preset at 60/40 which is a guesstimate as they drill a 1mm hole thru the stopvalve rather than a dial to gauge ratios

june at gaps was suitably unimpressed lol

got to give her credit , helpfull , informative and very patient

[Window Washers]

great stuff,