We draw AAMI water analysis' every 3 months. After this, we change out loop return filters on the loop so they match the analysis date. On our policy, it states that the loop return filters (endotoxin) should be changed every 6 months or delta >10psi. That being said, does the water analysis have to match or be in the same month as the loop return filters change date? How often are your filter's changed?

We have two 20", 0.2 micron filters for the loop return.

Future help is appreciated.

Thanks,

Whats the reasoning behind the quarterly AAMI Contaminants analysis? Whats the connection between the chemical analysis of your water and the endotoxin filter replacement other than maybe its simpler to do them both at the same time?

On a survey done on a clinic in lufkin, tx, rumor has it that state cited the clinic for not putting a matching "filter change/aami ana." date. I was wondering if I accidently read over a regulation and it didn't register. I'm trying to find a reg that states this, but having no such luck.

San Augustine,
I've never heard or read of intervals that frequent being a requirement.
We do analysis twice a yr, and endo filters annually, unless delta is >10(hasn't happened yet). No issues as of yet.
As far as the 'matching', I wonder if that was clinic policy that wasn't followed and cited.

Thanks Brian! Yeah the endo filters are every 6 months via policy here. I will start doing AAMI draws every 6 months instead of 3 and maybe you're right about the clinic policy that wasn't followed. I sure hope so! Take care.

Thanks again,

in texas, aami analysis are required at least twice a year(tap,ro,loop)....seasonal changes in water quality and any other "red flags" should dictate analysis frequency....and generally you want to sample when the water quality is at it's worst to validate the effectiveness of the ro....search previous posts with replies by Florian(Larry Alexander)....filter replacements are dependant on several factors including manufacturers recommendations as well as the contact time of the disinfectant being used......read the product insert that comes with the filters or get one from the manufacturer.....and 0.2u filters are not adequate for the water loop.....0.05u are the mimimum needed

I think that 0.05 is for ultra-pure dialysis, we are not ultra-pure (no diasafe etc.). Also, there is no DI or UV.

This message has been edited. Last edited by: ss,

Not sure where you guys are getting your info? At FMC we do the AAMI analysis quarterly alternating the tap and soften/dechlorinated every other time and the RO permeate every time. The loop and endo filters have nothing to do with the AAMI testing. They are not testing for endotoxins or bacteria they are testing for the chemical contaminant levels (i.e. Calcium, Magnesium, etc. We change the endo filters semi-annually. Totally different items.

AAMI RD52 says "Chemical analysis for the contaminants listed in 4.1.1 (Table 1) should be done when the RO system is installed, when membranes are replaced, and at not less than annual intervals thereafter to ensure that the limits specified in 4.1.1 are met (see Table 1). It is further recommended that chemical analyses be done when seasonal variations in source water suggest worsening quality or when rejection rates fall below 90 %." As mentioned above, Texas requires semi-annual testing along with a few other states (I believe SC requires quarterly).

Changing the endotoxin filter should not affect the impurities listed in the AAMI analysis, therefore, you are not required to perform the AAMI analysis when you replace the endotoxin filter. If you replace the RO membrane or alter how your DI system is set up, you should perform an AAMI analysis since the water quality may have changed. You should not be required to perform an AAMI analysis every time you change your DI Tanks as long as they are regenerated per a standard process.

Your welcome & I hope so too!
Judging by the other posts, no one else has heard of this either.

We are doing a quarterly AAMI water analysis because we use Granuflo which requires an analysis every 3 months.

Where did you find that info? I've never heard this before. We've had Granuflo for over three years and only took samples when it was first installed. Let me know, is this a company thing or what?

Read the owners manual I believe it is a recommendation

The only time a surveyor should require a matching date on a filter change and the AAMI analysis is when the RO membrane is changed.

1/4,

It states in the operators manual that "The composition of the first batch of Granuflo product must be tested by a qualified testing laboratory to insure that the resulting product meets the Granuflo product specifications".

It also states that "An AAMI standard purified water analysis for bacteria and endotoxins is recommended monthly". This is just your monthly water testing.

You may be confusing the part where it says that the water used in the Granuflo must meet AAMI standards.