Ro/Di Filter system

bryan oestreich · Dec 26, 2018

I am looking into getting a rodi unit to start a saltwater tank. I have a few questions

I live in a mobile home, where is the best location to hook it up?

I've never used a rodi unit. I know there is a waste water and filtered water? Can I hook the filtered water up to come through kitchen sink faucet? And where do I run the waste water?

I am also looking to use it as a drinking water filter as well. Do I need different cartridges for drinking than for the tank cause I know rodi isnt very good for us? I've seen the dual drinking/aqaurium units that u can buy are they actually different or just marketing?

Brad Miller · Dec 26, 2018

Rodi...tap main water line into unit, can use a saddle tap on the water line to your kitchen sink faucet.
Take waste line from unit to any drain in the house or sink drain
Take good rodi water to a fill Point for you to use.

Do not drink rodi water, it is very aggressive (mineral free) in the way that it will attack or leech out minerals from anything it contacts, that's why certain plastic water lines are used instead of copper or metal ones.

Deiblerj · Dec 26, 2018

bryan oestreich said:
I am looking into getting a rodi unit to start a saltwater tank. I have a few questions

I live in a mobile home, where is the best location to hook it up?

I've never used a rodi unit. I know there is a waste water and filtered water? Can I hook the filtered water up to come through kitchen sink faucet? And where do I run the waste water?

I am also looking to use it as a drinking water filter as well. Do I need different cartridges for drinking than for the tank cause I know rodi isnt very good for us? I've seen the dual drinking/aqaurium units that u can buy are they actually different or just marketing?

Also interested in learning more about RODI systems for tanks and drinking and how those are set up

minus9 · Dec 26, 2018

Bulk Reef Supply has a lot of vids on the subject.
https://www.bulkreefsupply.com/video/view/week-7-how-to-produce-the-best-water-possible/

Aquavaj · Dec 26, 2018

You can tap it into any cold water line. People commonly tap it at a kitchen faucet, washer hookup, garage or outdoor faucet.

If you want to drink the filtered water, collect the water after the RO and not after the DI filter. You'll likely need a pressurized water tank to store the drinking water. The waste water can be drained to a sink or collected for non-drinking purposes.

JoshH · Dec 26, 2018

Aquavaj said:
If you want to drink the filtered water, collect the water after the RO and not after the DI filter. You'll likely need a pressurized water tank to store the drinking water. The waste water can be drained to a sink or collected for non-drinking purposes.

+1 On this, you won't really be able to directly plumb your clean water back into your kitchen faucet. Typically as mentioned above, you will plumb a separate line after the RO stage but before the DI stage. This line will run into a pressurized RO tank which will lead to it's own faucet. You can buy RODI Setups with everything you need to do this including the tank and faucet. Your RODI line should run to a separate storage container or just have a SO valve at the end and open it to make RODI water when you need it.

Purchase any RODI system and grab this along with it...
https://www.bulkreefsupply.com/brs-add-on-faucet-kit.html

Captain Quint · Dec 26, 2018

Aquavaj said:
You can tap it into any cold water line. People commonly tap it at a kitchen faucet, washer hookup, garage or outdoor faucet.

If you want to drink the filtered water, collect the water after the RO and not after the DI filter. You'll likely need a pressurized water tank to store the drinking water. The waste water can be drained to a sink or collected for non-drinking purposes.

Spot on 100%

Captain Quint · Dec 26, 2018

JoshH said:
+1 On this, you won't really be able to directly plumb your clean water back into your kitchen faucet. Typically as mentioned above, you will plumb a separate line after the RO stage but before the DI stage. This line will run into a pressurized RO tank which will lead to it's own faucet. You can buy RODI Setups with everything you need to do this including the tank and faucet. Your RODI line should run to a separate storage container or just have a SO valve at the end and open it to make RODI water when you need it.

Again +1 100%

redfishbluefish · Dec 26, 2018

You can set up an RO unit to do both drinking water and produce DI water for you aquarium. To make it easy to explain, I'll assume you're starting with a unit that is for drinking water.....so it comes with a polishing filter (typically attached to the top of the RO membrane) and a 3 - 5 gallon holding tank, and a spigot that you have attached to your sink. So you have something that looks like this:

Now for water for your tank, you'll need to pick up a tee-valve (BRS sells them HERE) and a DI canister (again BRS HERE). You want to put this valve after the RO membrane and not after the tank. The reason is that the tank is charged with water on demand....each time you turn on the faucet...and has what is termed break-through TDS...so it's slightly elevated....good for drinking, but bad for your DI resin. If would cause for you going through DI quickly.

The valve is now hooked to the DI resin canister. When you want to make water for your tank, turn the valve directing water through the DI resin.

As far as the waste water, you can get a fitting that hooks to the drain of your sink put the water directly down the drain. As suggest setting this up under your sink....and yes, it will take up quite a bit of space.

Hope this helps.