Neat setup OZZ_!!
Regarding RO, you can assemble your own for cheap, no need for a 5-6 stage "drinking water" unit (you don't need those extra 2 stages nor a pressurized tank or faucets); I assume your water needs are low; in that case I'd source a simple "passive" (no booster pump) kit, like e.g.
- RO Buddie
Check its install video, really easy. Another install video
I see Chicago tap water chemicals is an issue; so to remove them first, I would add an specific two stage chemical filtration before the RO Buddie; this Video
can help, but no need to use his complete setup (he needs much more water than you); just check the two stage filtration stage.
-Filter housing Filter Kit
and Stainless steel
cartridge housings fitter. (These will go before RO Buddie tap water intake)
For less than $100 you will have a cheap RO system delivering good quality water.
This method (no pumps boosting tap water pressure) will waste a lot of water, so only ok if your water needs are low.
For better efficiency and if you want to keep everything passive I'd add a Permeate pump
instead (Install video
Finally, you can add an ASO valve (Auto Shut Off valve) to stop RO when your reservoir is full for automatic operation.
- ASO Valve Float Valve Install Video with float valve to make your DIY reservoir
To finish the system, you could add afterwards this fitting on the brine out from the membrane:
This will allow you to open this valve to manually backflush (clean) your membrane when desired. Fittings cheaply available
in amazon too. (operating position should be closed!)
Lemme know if I can help! I could create a diagram on all the connections. Water is our prime matter and the single most important factor when growing. And... we smoke it aftwerwards, so the cleaner the water... the healthier the outcome.