[Dave Mills]

Thanks

Last Q.
Where is the cheapest place for the housing ? and will my present ro unit booster pump work for this new set up?

Ok 2 Questions  

Dont know about cheapest.  I dont buy on price alone.  I get advice from Gaps so I buy from them.  Possibly cheaper places but people dont use me because Im cheap, so I use the best suppliers I can find.

I dont think that this would affect your booster but I do not know for sure.  Sorry.

[Dave Mills]

Dave how big is the bag off washed carbon

25Kg.

[wightsurf]

thanks for the help Dave

[jk999]

Dave what size vessel do you use for carbon and what size for resin cheers kev

[Dave Mills]

All 8 x 35.  I dont like changing resin or charcoal.

[dave0123]

Hi guys

I recently bit the bullet and upgraded my 450gpd to a 4040. Starting to wonder if I was better off with what I had. Embarrassed This is getting expensive inc time and still not happy with output tds.

Im getting a TDS of 34 off my tap pressure (45PSI) and cant get much better than 29 with the pump on 80 - 100psi depending on waste ratio. My input is 320.

Weird thing is the membrane has been back in the housing to the supplier for testing and they got down to 13 with tap pressure of 55psi and similar input tds.

SO what am I doing wrong? I have noticed that the prefilters were bubbling air out the outlet but no leaks Huh and they were when they were bubbling flowing a lot slower than the tap??? they don't seem to be bubbling now.
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I would check your water flow from the tap not the pressure the water flow its different, a membrane needs quite a lot of water to work efficiently and when you use a booster pump and increase the pressure this actually reduces water flow.. but increases pressure.

You may have good water pressure but poor water flow from the tap (not enough) if so.. there lies your problem.

[jk999]

All 8 x 35.  I dont like changing resin or charcoal.

sorry dave I dont understand these sizes

[Dave Mills]

http://www.gapswater.co.uk/acatalog/SPECTRUM-composite-vessel-complete-with-head--riser-and-screens--8--diameter-3496.html

8 inch diameter.  35 inches tall.

8 x 35.  Very big, possibly too big but hardly ever need changing.

[jk999]

Wow thats big