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UK Window Cleaning Forum => Window Cleaning Forum => Topic started by: A Foster on January 18, 2012, 09:07:09 pm

Title: What is 40 40 unit
Post by: A Foster on January 18, 2012, 09:07:09 pm
I will soon be looking at getting a RO system to start WFP.

I have read a few times about getting a 40 40 unit, but what is it and what's the difference?

What sort of set up should I be getting. Plan to set up at home and transfer pure water to van.

Thanks.
Title: Re: What is 40 40 unit
Post by: Lee Pryor on January 18, 2012, 09:24:45 pm
the number 40 is the length of the filter, 40 inches.

they are far superior to other RO units in terms of the speed and quality of the water produced, although they are more expensive.

IMO they are the only one to have. there are several choices of membrane to put in them. the one to go for is the hf5, which is designed to perform better at lower water pressures than the older hf4.

you should get a carbon and sediment pre filter and a softening filter to protect the RO unit, then DI after the RO to bring the purity down to 0 ppm.

hope that helps

Lee
Title: Re: What is 40 40 unit
Post by: Window Washers on January 18, 2012, 09:29:31 pm
Quote from: A Foster on January 18, 2012, 09:07:09 pm
I will soon be looking at getting a RO system to start WFP.

I have read a few times about getting a 40 40 unit, but what is it and what's the difference?

What sort of set up should I be getting. Plan to set up at home and transfer pure water to van.

Thanks.
it is the larger of ro units, it will enable you to produce water at a quicker rate, than that of a domestic 100/200 gpd ro unit this uses less waste than a merlin also.

100 GPD (gallon per day) against a 4040

is a little bit like having a mini and a ferrari one will poddle along the other will speed along but at the same time one costs more, but for good reason

Agree with everything that Lee just said apart from the softner that just wastes time and makes very little difference at all, I tested this as my water out of tap was about 400 tds out of tap, with and without softner made little different apart for the softner taking more time with messign about with it on every fill, using same 4040 membrane 3 years later and used everyday with no softner in very hard water area
Title: Re: What is 40 40 unit
Post by: sean84 on January 18, 2012, 09:31:49 pm
Can anyone recommend one? Need to get a RO in a few weeks, just ordered a tds meter so getting there slowly!
Title: Re: What is 40 40 unit
Post by: Window Washers on January 18, 2012, 09:33:24 pm
Quote from: Sean @ Gleaming Windows on January 18, 2012, 09:31:49 pm
Can anyone recommend one? Need to get a RO in a few weeks, just ordered a tds meter so getting there slowly!
gaps water sell them
Title: Re: What is 40 40 unit
Post by: Spruce on January 18, 2012, 09:54:03 pm
Gardiner's also do them.