RO/DI Revamp!

[LoneStar]

I've been kicking around the idea of buying a new RO/DI system for a few months now, to replace the 'sub par' one I have been using. Instead of buying a new unit, I want to re-build mine, since the housing(s) and bracketry is still in good condition.

Basically what I have is just a 'Ebay' RO/DI unit. The membrane was replaced 6 months ago and is in good condition. The only items that aren't up to par is the flush valve, the prefilters (want to use better ones since I'm not sure of which brand(s) are in use), and the DI chamber is tiny and worthless.

What I want to order is:

* Pre-filter set. I have 3 standard chambers before the RO filter. I want to know which ones to get (sediment, carbon, carbon).

* A flush valve. The orignial one broke, so I just use a ball valve thats a pain to adjust (no precision)

* A stand alone DI chamber.

* TDS meter. Never used one :o But want one before I start filling my new tank up ;)

* A pressure gauge.


The RO/DI unit I have now has a shut off valve, like the photo below. From what I gather, if I use a check valve on the output side of the DI (with a float valve), thats how this shut off valve works? If anyone has a skematic of which way it should be hooked up, that will help. I'm not sure I even need to use it, because I feed my RO/DI unit with a garden hose. I just turn it on and off when I want to filter water for the afternoon.
http://www.buckeyefieldsupply.com/ProductPhotos/Product_117.jpg

Other than that, any other advice would be appreciated.

[tony]

come over and have a look at my new aquafx unit, it might save you a lot of time/money in the long run

dual inline tds is the only way to go

[tony]

here is the inline dual tds for you:

http://www.aquariumwaterfilters.com/index.php?page=shop.product_details&flypage=shop.f lypage&product_id=52&category_id=17&option=com_php shop&Itemid=28

industrial inline dual tds (not sure of the difference but i bet i can guess)

http://www.aquariumwaterfilters.com/index.php?page=shop.product_details&flypage=shop.f lypage&product_id=53&option=com_phpshop&Itemid=28

nice pressure guage:

http://www.aquariumwaterfilters.com/index.php?page=shop.product_details&flypage=shop.f lypage&product_id=67&category_id=9&option=com_phps hop&Itemid=28

[LoneStar]

Thanks Tony :) I may swing by this weekend to check it out.

Also Buckeye Field Supply has a lot of the same products for cheaper prices. Like the Dual inline TDS is only $24.79! Plus I'm looking at saving $100 or more just rebuilding it too...but I'm open to any suggestions.
http://www.buckeyefieldsupply.com/showproducts.asp?Sub=149&showspecials=149

Or I may just get the hand held one so I can spot check areas easier.

[tony]

good deal, that looks like the exact same meter

swing by, you might not recognize my tank now