Hello I have your Barnstead BPure System in my lab When we order new cartridges D0803 D0832 from Fisher Scientific they do not come with new rubber Orings One small and one large We have been using the same Orings for some time and would like to replace them as the large ones leak Do you sell Orings for these cartrdiges or were they to be included with each new cartridge Darren
Great for Lab Water Pretreatment
or Great Drinking Water
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