We recently purchased an APEC 90 GPD system to replace our old 50 GPD system. These filters are designed for when we need to replace the entire filter set, which shouldn't happen in 3-5 years. The filters are identical to the new system I just installed which is why I am giving the product a five star rating. While this isn't a review of the APEC 90 GPD system, I give this purchase a high review as well. The difference between this and the old block is amazing. In addition to cooking, drinking, and ice making, we use reverse osmosis water to nurture 60 orchids for two weeks and run about 14 gallons of water. We had to store many gallons of water to complete the work, which took two days to collect. This time we only used 4 gallons of stored water - the rest flowed straight out of the reverse osmosis faucet. We have never been able to run the system dry. We only used the stored water because we didn't want to wait as long as the reduced flow would last. We often ran the old system dry. Bottom line - this is a great reverse osmosis system.
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