RODI Canister Plumbing Question

[Travis Wagner]

Hello!

I wanted to ask about my RODI setup. I’ve got an older Aquamaxx which was converted from a 3 stage into a 5 stage with two membranes, one sediment filer, two carbon filters, and two resins.

I’m getting air in the third canister, as seen in the photo, and I don’t recall this happening before. Maybe from lack of flow? Not sure if it’s a problem.

The flow of water appears to be from the source to canister 1 (sediment filter), canister 2 (carbon), booster pump, membranes, canister 3 (carbon), then to an add-on two canister module (resin) and then is product water.

Pressure measured at the booster pump is 80 psi (needle bouncing 75-85 psi). I don’t have my TDS sensor hooked up properly so I’m not getting an output reading after the resin.

Do I need to change any of the plumbing sequence with the canisters?

 

[KochergenJ]

The order of canisters sounds fine, different setup but mine goes sediment, carbon, membrane,resin. As for the air, have you checked all fittings and made sure canisters are tight?

 

[braaap]

Crack that canister until the water starts coming out. Then snug it up. If it keeps picking up air it’s likely a seal in that canister or the fittings.

 

[Travis Wagner]

With that canister I’ll crack it to release the air and re-tighten but every time I check on it the air back in the canister. Is it likely the seal for that canister or could it be in the water lines/fittings? I haven’t noticed any leaks yet.

 

[KochergenJ]

Could be a seal, fitting not all the way secured, or maybe a cracked hose.

 

[Buckeye Hydro Verified Sponsor]

The (typically) clear container that holds a filter cartridge is called a housing.

Unscrewing a housing to burp air out only works with an axial flow cartridge like a refillable DI cartridge. A carbon block is a radial flow cartridge - so that approach to getting the air out doesn't apply here.

I suspect your system is syphoning out that water. A simple syphon break would likely solve your issue.

Russ