Adding RO filter to old Unger dual DI cart

Waterfed Poles
1

So I have an old Unger dual DI cart. Would it be better to just add an RO filter to it along with a couple of pre filters from home Depot or would it be better to just buy a new 3 stage system?

I have had the cart for a while. I wanted to try out wfp and so I bought the cart to test the waters. I really need 3 stage system as the DI alone only lasts through a hand full of jobs. I don’t want to spend a lot starting out as money is tight right now. Later this year I may drop some money on a better system but I want something to get me by until busy season later this summer.

I have limited room in the van and the Unger DI cart just fits standing up. Thanks for the help.

2

Also if I can just add an RO filter where do I get one and for how much? Thanks

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We will be offering a complete 4 stage RO/DI system for $999 starting on Feb. 1st.

Might be worth waiting a week to see.

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4

Maybe @John can chime in here with some advice for you.

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Here is a kit that you can build your own system. Just use a sediment carbon filter first then the RO before your Unger DI. https://shopwindowcleaningresource.com/ro-membrane-for-xero-pure.html Tucker Carbon Filter for RO/DI Cart | 10 Inch | WCR – WindowCleaner.com
https://shopwindowcleaningresource.com/stainless-steel-ro-membrane-housings.html

https://shopwindowcleaningresource.com/wash-it-pre-filter-housing.html

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IMG_0207.JPG2452×1379 408 KB
There are many ways to add a RO to your existing system.

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John thanks for the info. Would the 4"x21" RO be large enough to work in conjunction with the older Unger dual DI cart? Or would I need the 40"? The 21 would be the perfect size to add to the cart.

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I would recommend just adding your own ro membrane. Is there anything wrong with your dual di? If not, go for a simple housing with a ro.

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Any recommendations on an RO housing?

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Here are some different options depending on preference…https://shopwindowcleaningresource.com/ultra-low-energy-ro-membrane.html

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That’s just the membrane itself though right? Or is it the membrane and housing?

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Yes, those are just the membranes that needs to go into these…https://shopwindowcleaningresource.com/stainless-steel-ro-membrane-housings.html

They have a few different length and thickness options as well as the actually make up material of the housing (aluminum, pvc, etc…)

Does anyone have any experience with going from a 40" membrane to a 21"?

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Which RHG 4 stage?

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I posted above links to all you would need to build your own RO system to go along with your DI from Unger cart. Yes you could use 2 21 inch housings and membranes if that fits your cart. I can get those for you as well. Two 21 inch membranes will work just like on 40 inch.
https://shopwindowcleaningresource.com/stainless-steel-ro-membrane-housings.html
https://shopwindowcleaningresource.com/ultra-low-energy-ro-membrane.html