[giftedk]

**NR1: THE BIGGEST 180 GPD/700 LITRE/DAY - 24H-DISPATCH Item number: 180101122539

Im looking for a bigger ro unit and have seen this on ebay. Im not sure whether it is what i need, 700 litres would do me though. It says its for an aquariam is this the same thing.?
could some of you please take a look for me before i purchase it  as i dont want to waste my money.
many thanks
 :

[Paul Coleman]

**NR1: THE BIGGEST 180 GPD/700 LITRE/DAY - 24H-DISPATCH Item number: 180101122539

Im looking for a bigger ro unit and have seen this on ebay. Im not sure whether it is what i need, 700 litres would do me though. It says its for an aquariam is this the same thing.?
could some of you please take a look for me before i purchase it  as i dont want to waste my money.
many thanks
 :

The figures quoted are  usually a theoretical maximum if perfect conditions exist.  I have a 300 gpd RO and the most I ever got from it was 700 litres in 24 hours.  More typically it's about 500 these days - which is OK for me as a sole trader.  I have a booster pump and lowish water pressure.  Conditions can vary a lot so can the water production.  If I used a 180 gpd RO in my circumstances, I would be pushing my luck at around 300 litres per day production.  However, if your conditions are good (good pressure etc) then you may get a fair bit more from it.  Also, it depends how much water you use in a day normally.

[giftedk]

I currently have an ro 200, so i take it that this means litres. im just looking for something that will give me between 500 and 700 litres a day.

[JM123]

Save yourself the aggro and get a merlin, or if you can afford it a 4040.

[giftedk]

but doesnt a merlin produce  around the same amount?, and whats a 4040 ?

[JM123]

Merlin will make between 1500 and 3000ltrs a day - a 4040 uses a 4inch by 40inch membrane and will make between 1500 and 6000ltrs a day.

[poleman]

A Merlin you will have to waste a lot of water
 http://wintecs.co.uk/catalog/product_info.php?products_id=507

[poleman]

I had a 40 40 RO and with mains pressure and a very high pressure pump did produce 1000lts every hour and forty mins, Merlin just couldn't do that

Andy

[Paul Coleman]

I currently have an ro 200, so i take it that this means litres. im just looking for something that will give me between 500 and 700 litres a day.

In spite of metrication, RO numbers usually refer to GPD (gallons per day).  Also, they are US gallons rather than UK gallons.  US gallons are about 10% smaller.  So let's say that each GPD refers to 4 litres.

A 300 GPD RO should give 1,200 litres per day in theory and if everything is perfect (right water temperature, excellent pressure, hardly used membranes etc).  However, you won't get 1,200 per day from a 300 GPD. I've heard of people getting around 800 litres a day from one.  I've never had more than around 720 from mine.  It has dipped as low as 420 litres but seems to be producing at about 500 litres per day right now.  This should be fine for a sole trader.  Bear in mind that if you are not working over a weekend, you can always store a load of water into canisters on the Friday and let the tank fill over the weekend.  This could be handy storage if you get a very large dirty first clean and need a load of water of if things go wrong with your RO in future.

[Pj]

I had a 40 40 RO and with mains pressure and a very high pressure pump did produce 1000lts every hour and forty mins, Merlin just couldn't do that

Andy

I can vouch for the 4040, it will definitely do that!  Easy 500 litres per hour.  At that rate = 3,000 gpd!!!  and it can do more.

[giftedk]

where can i get one of these 4040 s ?

[JM123]

Hi Gifted, we supply a stainless steel 4040 with prefilters on a board for £665 inc VAT.

E-mail me j.mills175@btinternet.com