Hello,

We've 2 carbons on our portable ROs. Would like to save money by rebedding. We've the Zyzatech style tanks with the sample ports on the head of the tanks. How hard is it to rebed a tank?

Where can I purchase the GAC to do the job? I prefer the dry carbon. Locally we've a vendor that sells a moist/ semi wet carbon. They will not pack Zyzatech tanks for it is a manual process for them.

Please advise.

Thanks
Ivan

It's not hard at all. In a nutshell; depending on size, just takes a few minutes to clean out. Soak in bleach water. New carbon in, rinse, soak and rinse again the next day and you're ready.

I get my carbon from MarCor, pn:ME50097, comes in 1cu ft bag.

My tanks are .25 cu ft.

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quote:

Originally posted by Idaho:
It's not hard at all. In a nutshell; depending on size, just takes a few minutes to clean out. Soak in bleach water. New carbon in, rinse, soak and rinse again the next day and you're ready.

I get my carbon from MarCor, pn:ME50097, comes in 1cu ft bag.

My tanks are .25 cu ft.

Meant to mention we have the baby tanks... 16 inches tall. MarCor is the vendor with the moist carbon. Is your part number dry carbon? Or moist? Or does it matter? Will be rebedding quite a few tanks and they will sit for about 6 months before using them. Is that a problem?

Ivan,

We get dry carbon from Marcor but I don't know the number....I just tell them what I want and they look it up.

Chuck

Ivan, we get our carbon from Siemens Water Technology (formerly US Filter). It comes in 2 cu/ft bags and is dry. The p/n is AC1240AWPB55. Their phone number is 1-800-875-7873.

It's dry carbon which complies with regs.

Be careful with dry carbon. It will have a lot of carbon fines which will get through your RO prefilter and plug your RO membranes if you don't completely rinse out the fines.

Wet carbon has probably been acid washed. Dry carbon has probably not been acid washed. Not all carbon needs to be acid washed; just the ones with high aluminum content. AAMI recommends using acid washed carbon.

AAMI says that the tanks (inside) SHALL be disinfected when changing the carbon.

If you are going to change your carbon yourself on a portable unit, one option would be to contact AmeriWater to get their carbon sock. You just lift out the old sock (carbon is inside the sock), disinfect the tank, and install the new sock.

FYI, the carbon that I previously mentioned is acid washed carbon.
Florian, just for reference, which AAMI reg. states that carbon tanks SHALL be disinfected when exchanging carbon? We have had both Mar Cor and Siemens Water rebed our carbon tanks, we have four 10 cu/ft tanks, and not once have either of them disinfected the tanks prior to refilling them with carbon. It takes 8-10 hours the way it is by time they are finished rinsing, so I can't imagine how much longer it would/will take if we/they started bleaching the tanks before rebedding them.
Also, yes dry carbon does have a far amount of fines but they aren't a problem if you rinse properly.

Midwest, I may be stretching it but, RD62 4.2.5 says "All devices that are regenerated or reconstituted off-site, such as deionizers, shall be disinfected at the time of regeneration or reconstitution so that contaminated water is not reintroduced into the system after regeneration or reconstitution." 5.2.5 says "Where regenerated or reconstituted devices are provided by a vendor as medical devices, the disinfection and intermixing requirements of 4.2.5 may be demonstrated by certification that the device has been disinfected using validated procedures during regeneration or reconstitution and that validated procedures have been used to ensure that the devices and their components have been kept separate from devices and components used in nonpotable water applications."

Bacteria grows in the carbon tank. Therefore, it should be disinfected when changing the media.

We get our carbons to rebed the portable carbon tanks from X L Filtrations Tel # 800 953 4583. Greg and Stephanie will help you what kind you need.

Florian, I can see where you are coming from but the key word here is "offsite" meaning that tanks are being shipped in/out to be serviced. This is in place so that tanks for non-medical sources and medical sources do not get interchanged without being disinfected before being sent back out. I can see how it could be assumed to be a good practice even on inhouse rebeds but with large tanks such as ours it is not feasable to do so. Our tanks are simply too large and our clinic is too busy to accomplish this without shutting the clinic down for a couple days. Maybe if you had 2-3 cu/ft tanks but not with 10 cu/ft tanks. Just my opinion.