[AuRavelling79]

I've still got an RO-man type 300gpd which is on its limit to feed Dan the Man and me a total of about  3000 litres per week (that's "pure" not "pure" plus waste.) even when running 24/7.

What should I replace it with?

I see on Gardiners site a 500gpd fat single membrane which is £35 for the housing and £98 for the membrane. (plus VAT) Anyone use one? Could I get that and just expand my 300gpd .

Or should I go for something else completely. I think I would like something that produces 4000L of pure in a week to give us some spare capacity.

Thoughts please?

[robert mitchell]

I would go for this one , the carbon /sediment filter last for 350000 litres of water and it will more than keep up with what you need
 
.https://www.grippatank.co.uk/ez-pure-commercial-ro-axeon-hf5-kit1

[p1w1]

can you not just upgrade your membranes to 150gpd ones instead of 100gpd membranes

[Don Kee]

I've got a second hand 450gpd R.O for sale with and aquatec 8800 booster pump for sale if you're interested mr Gold?

It'll probably want new membranes though as its been sat around for a bit though

Or

Add another membrane to make yours a 450gpd and add a booster (if you haven't got one

Or

Just maybe bite the bullet and get a 40/40 (maybe go halves with Dan the Man?)

[Perfect Windows]

I've still got an RO-man type 300gpd which is on its limit to feed Dan the Man and me a total of about  3000 litres per week (that's "pure" not "pure" plus waste.) even when running 24/7.

What should I replace it with?

I see on Gardiners site a 500gpd fat single membrane which is £35 for the housing and £98 for the membrane. (plus VAT) Anyone use one? Could I get that and just expand my 300gpd .

Or should I go for something else completely. I think I would like something that produces 4000L of pure in a week to give us some spare capacity.

Thoughts please?

I like using a 4040 with a booster pump.  It's overkill but if necessary (you know that horrible moment when you realise on Sunday afternoon that you've cocked up) I can make 600 litres of pure in three hours.  I get the feeling that it's never under stress and the TDS hasn't moved a jot in three years (I flush for twenty minutes every six months).  The problem is the cost to set it up - you can go HF4 with a booster (quite a bit cheaper than an HF5) but it's still steep.  I run at 2 waste to 1 pure so it probably helps to make sure that water costs aren't exorbitant.

Armed with a DI canister full of acid-washed charcoal as the sole incoming filter (from Gaps water) and a couple of DI vessels full of resin, I do a refill every year and forget it completely the rest of the time.

As ever, you have to pay for it but it's a system that you can ignore.

Vin

[AuRavelling79]

@Robert Mitchell

That HF5 kit 1 at £455 - is it everything I need to connect and go?

@Vin

The HF4 - how much is that as a complete set up? You say it is cheaper than a HF 5? The one that Robert linked to is  £455 plus VAT which seems fine to me.

What's the difference?

Sorry I need it spelling out in words of one syllable when it comes to technical stuff.

Thanks to everyone for your replies so far,

[a900]

can you not just upgrade your membranes to 150gpd ones instead of 100gpd membranes

I upgraded mine in the past this way. Found the 150gpd ones never produced as low tds as the 100gpd membranes atleast with the water pressure I had. Meant I then needed to run a booster pump.

Looking back I wish I had just got the 4040 and be done with it. I probs use the same pure as you. Ended up costing little more than upgrading the small system and is only on a few nights a week.

[Don Kee]

I bought this one a while back Gold -

http://www.daqua.co.uk/ro_systems.htm
(Second one down)

Slightly cheaper than the one posted above, reputable seller, and its everything you need to go (bar a D.I vessel)

[Perfect Windows]

@Robert Mitchell

That HF5 kit 1 at £455 - is it everything I need to connect and go?

@Vin

The HF4 - how much is that as a complete set up? You say it is cheaper than a HF 5? The one that Robert linked to is  £455 plus VAT which seems fine to me.

What's the difference?

Sorry I need it spelling out in words of one syllable when it comes to technical stuff.

Thanks to everyone for your replies so far,

The whole caboodle from Gaps comes in at £909.  Then another £250 for a Clarke CBM240E booster (buy it when they are doing their "VAT free" promotion).

What it doesn't include is the piping or the inline TDS meter.  I've now managed to source all the parts to use only standard 15mm John Guest pipe for everything (bar about 150mm of 1/2" for the inline TDS meter - though I may have solved even that bit in the past few days; not tested yet but may work).

That's good for, as I said, 200 litres an hour and going from input 300TDS to 7.  One guy with the same setup gets down to 4, one down to 9.  The booster pump pays for itself in resin in no time.

Vin

[andyM]

Yes I went the 4040 route nearly 3 years ago now and I'm glad I did.
I bought the single Fibredyne  with HF4 4040 from Gaps water: http://www.gapswater.co.uk/acatalog/Fibredyne-Reverse-Osmosis-Kit--4040--4960.html#SID=539

I've found it works out quite good value for money as nearly 3 years on the membrane is still producing 008ppm before resin.
On my old 400gpd ro (2 x 200gpd membranes) I was needing new membranes at £80 a pop every 9-12 months and was costing me more in resin as couldn't get below 0015ppm despite using a booster pump.
So in the time I've had the RO I've found despite the initial purchase price it is cheaper to run than my older system.
But for the convenience of knowing that it can produce what I need within 2 hours it was worth it.
By the way the kit came with all the fittings and 1/2" JG tubing as far as I can recall but I did require a booster pump with the HF4 which I bought from Machine Mart.

[AuRavelling79]

This is all very helpful guys thank you.

My tap pressure is 80 psi according to the gauge on my RO and has been for the last ten years (except when "Ourlittlest'un" is in the shower at he same time as  "Our lass" has the washing machine running when it dips to  70psi!).

Do I need a booster pump and why?

[AuRavelling79]

This is all very helpful guys thank you.

My tap pressure is 80 psi according to the gauge on my RO and has been for the last ten years (except when "Ourlittlest'un" is in the shower at the same time as  "Our lass" has the washing machine running when it dips to  70psi!).

Do I need a booster pump and why? I haven't so far.

[andyM]

This is all very helpful guys thank you.

My tap pressure is 80 psi according to the gauge on my RO and has been for the last ten years (except when "Ourlittlest'un" is in the shower at he same time as  "Our lass" has the washing machine running when it dips to  70psi!).

Do I need a booster pump and why?

Maybe not.
I run my ro at 100 psi from booster but 80 psi may well be sufficient?

[dd]

If you are happy with your ro you could just buy a bigger static tank.

[AuRavelling79]

If you are happy with your ro you could just buy a bigger static tank.

I've got 2700 litres of static storage but the RO just seems to slow to a trickle within a few months and the ppm rises from about 10 at the start up to about 25 when I buy new membranes at £100 a set. Seems I could reduce my running costs.

[dd]

I have a 300gpd triple membrane ro. My tap pressure is around 55psi. water goes in around 200ppm and product water is between 001 and 005. I do use a water softener and membranes last a long time.

[AuRavelling79]

I have a 300gpd triple membrane ro. My tap pressure is around 55psi. water goes in around 200ppm and product water is between 001 and 005. I do use a water softener and membranes last a long time.

How do you mean - you use a water softener?

[robert mitchell]

The one from grippa is everything you need , first vessel is is carbon sediment and lasts 350000 liters , second is 21 inch ro and it comes with waste valve etc .

Just tap water in one end and out to your di vessel the other .

Will produce around 150 liters per hour .

Very easy to set up , all John guest fittings .

[PCM LTD]

http://www.purefreedom.co.uk/water-purification/reverse-osmosis/2400-gpd-high-volume-reverse-osmosis-system-40-membrane-40-hf4-with-large-booster-pump.html

[dd]

I have a 300gpd triple membrane ro. My tap pressure is around 55psi. water goes in around 200ppm and product water is between 001 and 005. I do use a water softener and membranes last a long time.

How do you mean - you use a water softener?

I have a static system in the garage and the water goes through a water softener (the type you would have in your house) before it goes through the pre fitler and ro.

Not saying it is the most cost effective way to produce pure water but it does make the membranes last.