APEC has been making reverse osmosis systems since 1996. Their under-sink lineup is consistent, well-certified, and backed by genuine lifetime customer support. Here's how the main models compare and which one to choose.
The ROES-50 is APEC's flagship 5-stage system. NSF 58 certified, WQA Gold Seal, 50 GPD, 99%+ removal of lead/fluoride/arsenic. The most affordable entry into genuine certified under-sink RO.
APEC ROES-50 on Amazon →Read full APEC ROES-50 review →
Adds a pH+ calcite alkaline stage to raise output water pH to 7.0–7.5 and a faster 75 GPD membrane. For households where daily drinking water taste is the priority, this is the model to get.
APEC ROES-PH75 on Amazon →Read full APEC ROES-PH75 review →
Under-sink RO systems occasionally have installation questions, minor leaks, or performance questions years after purchase. APEC's lifetime technical support from Houston, TX is staffed by people who know the product. This is genuinely rare in the water filter industry and adds real long-term value to any APEC purchase.