[Spruce]

Hi All,

Has anyone upgraded a 300/450gpd RoMan R/O to a 40/40 by adding a 40" champ housing and relevant membrane please?

The reason for asking is that some complete 40/40 R/Os are supplied with 10" sediment and carbon block prefilters (some also have 20" prefilters).

As I already have 3 x 10" prefilters that could be utilised although the only down side is that they are fitted with 1/4" fittings as opposed to 1/2" fittings that the 40/40 uses. However, when flushing after installing new prefilters, the 1/4" tube allows a fair flow of water.

At present, the 450gpd unit I have uses 2 of the filters as prefilters and the 3rd as a resin filter. I was thinking of using the first as a sediment filter and then using the other 2 filter housings as carbon block filters.

I would also need to get a dedicated r/o vessel which I don't have at the moment.

Doing it this way would save about £200 by my calculation - hence the thought.

Your comments would be appreciated.

Spruce

[Window Washers]

Hi All,

Has anyone upgraded a 300/450gpd RoMan R/O to a 40/40 by adding a 40" champ housing and relevant membrane please?

The reason for asking is that some complete 40/40 R/Os are supplied with 10" sediment and carbon block prefilters (some also have 20" prefilters).

As I already have 3 x 10" prefilters that could be utilised although the only down side is that they are fitted with 1/4" fittings as opposed to 1/2" fittings that the 40/40 uses. However, when flushing after installing new prefilters, the 1/4" tube allows a fair flow of water.

At present, the 450gpd unit I have uses 2 of the filters as prefilters and the 3rd as a resin filter. I was thinking of using the first as a sediment filter and then using the other 2 filter housings as carbon block filters.

I would also need to get a dedicated r/o vessel which I don't have at the moment.

Doing it this way would save about £200 by my calculation - hence the thought.

Your comments would be appreciated.

Spruce

I think ro man use 1/4 on the 40/40 anyway mate, because I have one and they are defo not 1/2.
cant see a problem doing what you want too,

[Spruce]

Hi Ian

Thanks - interesting about roman units pipe size when most seem to use 1/2".

Spruce

[poole bay]

not being funnie to ro /man good bloke but i would not get one from them again im on my 3rd membrane and the slow right up im getting my next one from gaps think

[Ian Lancaster]

I've had an RO-man 40-40 for several years.  The connections are definitely 1/2".  The 40-40 membrane needs a high flow of water to work properly, I don't think 1/4" will give enough.

As to membranes, we use the HF5 and the current one has been in the unit for 3 years and is still producing at 6ppm from an input of 320ppm at 2:1 ratio.

[Window Washers]

I've had an RO-man 40-40 for several years.  The connections are definitely 1/2".  The 40-40 membrane needs a high flow of water to work properly, I don't think 1/4" will give enough.

As to membranes, we use the HF5 and the current one has been in the unit for 3 years and is still producing at 6ppm from an input of 320ppm at 2:1 ratio.

Ian the outside tube is 1/2 but not inside, I measured mine earlier, mine works properly and get good tds out from a very hard water area.
my ratio is 50/50 at 11/13 ppm and agin been using this over 3 years, but the tubing is smaller. My other 4040 is standard hose and fills alot quicker with the same ppm as I have now (me being lazy is the reason I have not changed over the tubing etc, but the time part makes little difference as it fills whilst out and has overflow fitted so not to flood the unit, which I did many times before fitting the overflow  )