APEC Water Systems ROES-100 Essence 5-Stage 100 GPD Reverse Osmosis System
Double the output of the ROES-50 for nine dollars more, and no certification at all.
$240
Usability
The ROES-100 is the strangest value proposition in the APEC range: it doubles the production rate of the ROES-50 for nine dollars more and gives up the WQA listing to do it. Its strongest attribute is refill speed, which matters in a household that empties the tank daily and is invisible in one that does not. Its weakest is that certification, because the ROES-50 sitting next to it at a lower price is the one with the listing, and APEC does not explain the difference anywhere. Owners who have asked APEC directly report being told the ROES-100 and the Ultimate RO-Hi share housings and drain line dimensions, which suggests the higher output comes from the membrane alone. The buyer is trading the only third-party evidence APEC offers for throughput, and that only pays off in a high-consumption home.
- 100 GPD, double the ROES-50, for nine dollars more
- Shares housings and drain line dimensions with the Ultimate RO-Hi
- Fast tank refill suits households that empty four gallons a day
- Standard cartridges keep the annual replacement cost low
- Assembled in California with lifetime technical support
- No WQA listing and no certification, unlike the cheaper ROES-50
- APEC does not explain why the higher-output model lost the certification
- Higher production rate means proportionally more drain water
- Warranty is one year unless registered within eight weeks
- Reviewers cover it far less than the ROES-50, so independent evidence is thin
The APEC Water Systems ROES-100 is the highest-output tank system in the Essence line, a five-stage under-sink reverse osmosis unit rated at 100 gallons per day. It shares its housings, drain line and tank with the Ultimate RO-Hi according to answers APEC has given owners directly. Unlike the ROES-50 and ROES-PH75, this model carries no WQA listing and APEC's own product imagery marks it as uncertified.
Additional information
Specification: APEC Water Systems ROES-100 Essence 5-Stage 100 GPD Reverse Osmosis System
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