APEC ROES-100 Essence Reverse Osmosis System vs Waterdrop G3P800 Reverse Osmosis System
Side-by-side comparison of features, pricing, ratings, and alternatives.
The ROES-100 is the high-output model in APEC's Essence series, a five-stage under-sink reverse osmosis system rated at 100 gallons per day. That capacity is the reason to choose it over the more common 50 GPD systems: a higher production rate means the storage tank refills faster, so a busy household is less likely to run the tank down between uses. APEC states the system removes up to 99 percent of contaminants. The five stages combine sediment and carbon pre-filtration, the RO membrane itself and a final polishing stage, which is the standard under-sink RO arrangement. APEC sells a deep catalogue around it: replacement filter sets, tanks, pumps, leak detectors, housings and faucets, plus alternative configurations including tankless, countertop, UV and pH-remineralising variants.
The G3P800 is a tankless under‑sink reverse osmosis system that eliminates the bulky storage tank, freeing up cabinet space while providing on‑demand filtered water. Its compact footprint fits easily into most kitchen layouts without sacrificing performance. With a five‑stage filtration process and a high‑rejection RO membrane, the system removes up to 99% of contaminants, delivering up to 800 gallons of clean water per day. Designed for DIY installation, it includes pre‑drilled fittings and clear instructions for a hassle‑free setup.
- High 100 GPD output suits larger households
- Comprehensive spare parts and filter availability
- Standard under-sink installation with a dedicated faucet
- Part of a range so upgrades and variants are easy to find
- Tankless design saves cabinet space.
- High daily output meets heavy usage.
- Five‑stage filtration removes a broad range of contaminants.
- DIY-friendly installation with clear instructions.
- Under-sink installation is not practical in most rentals
- RO systems produce wastewater alongside purified water
- Consumes cabinet space for the unit and the storage tank
- No smartphone app; monitoring is limited to the smart faucet’s TDS and filter‑life display.
- Initial installation requires basic plumbing skills.
- Water waste ratio, while low, is still higher than some countertop units.
More alternatives & similar tools
Alternatives to APEC ROES-100 Essence Reverse Osmosis System
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Pure drinking water at the tap with 99.9% contaminant removal
Tankless under‑sink RO system delivering 800 gallons per day of pure water.
Alternatives to Waterdrop G3P800 Reverse Osmosis System
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Condensing natural-gas tankless water heater for high-demand households
High-capacity 5-stage under-sink RO system producing 100 gallons per day.
The Verdict
AI-generated from listing dataThe Waterdrop G3P800 offers tankless, high‑output (800 gpd) filtration for space‑constrained homes at a premium price, while the APEC ROES‑100 provides a conventional 100 gpd system with a lower upfront cost but requires a storage tank.
Key differences
- •Daily output: 800 gpd (Waterdrop) vs 100 gpd (APEC).
- •Form factor: tankless (Waterdrop) vs tanked (APEC).
- •Price: $999 (Waterdrop) vs $239.95 (APEC).
- •Warranty: 1 year (Waterdrop) vs not specified (APEC).
- •Installation complexity: DIY‑friendly tankless kit (Waterdrop) vs standard under‑sink with tank (APEC).
Capacity
Waterdrop delivers up to 800 gallons per day, far exceeding APEC's 100 gpd.
Price
APEC costs $239.95, while Waterdrop costs $999.
Size & footprint
Waterdrop is tankless, saving cabinet space; APEC requires a storage tank.
Warranty
Waterdrop provides a 1‑year warranty; APEC warranty not specified.
Ease of maintenance
Both have replaceable filters, but Waterdrop’s DIY‑friendly design and clear instructions give it an edge.
Smart features
Neither system offers smart connectivity.
Overall value
Higher output vs lower cost makes each better for different buyer priorities.
Choose APEC ROES-100 Essence Reverse Osmosis System if…
Budget‑focused families who can accommodate a storage tank.
Choose Waterdrop G3P800 Reverse Osmosis System if…
Homeowners needing very high water output and want to save cabinet space.
Common questions
Which system is cheaper to buy?
APEC ROES‑100 costs $239.95; Waterdrop G3P800 costs $999.
Do either of these systems need a storage tank?
Waterdrop is tankless; APEC requires a separate storage tank under the sink.
Can I install the system myself?
Both are DIY‑installable, but Waterdrop emphasizes pre‑drilled fittings and clear instructions for easier setup.