In the box
- 5-stage RO unit
- Dedicated RO faucet
- Pressurized storage tank
- 4 extra replacement filters
- Feed water adapter
- Drain saddle and all tubing
Key specs
| Stages | 5-stage RO |
| Capacity | 100 GPD |
| Tank | Pressurized storage tank |
| NSF certified | Yes ✓ |
| Sentiment | Positive |
The key purchase reason: 4 replacement filters included
Most under-sink RO systems at this price point ship with zero replacement filters — you buy them separately when they're due, typically 6–12 months after installation. The FS-TFC includes 4 extra pre-filter cartridges in the box. For a typical household running pre-filter changes every 6 months, that's 2 years of spare pre-filters already covered.
This is a meaningful value addition that gets under-reported in comparisons. The upfront cost looks competitive, but when you account for the replacement filters you don't need to buy separately in the first 1–2 years, the effective value improves further. Reviewers specifically call out appreciation for this inclusion as reducing maintenance hassle.
Pros
- 4 extra replacement filters in the box
- NSF certified filtration
- Complete kit — faucet and tank included
- Positive reviewer sentiment
- DIY-installable with standard plumbing
- 100 GPD — adequate for most households
Cons
- Plastic housing — handle connections carefully
- Pressure tank takes under-sink floor space
- Slow tank refill after heavy use (standard for tanked RO)
- Requires a faucet hole or drilling
Filter replacement schedule
| Stage | Filter type | Replace every | Notes |
|---|---|---|---|
| Stage 1 | PP Sediment (5 micron) | 6–12 months | 4 included in box |
| Stage 2 | GAC Carbon | 12 months | Protects RO membrane from chlorine |
| Stage 3 | CTO Carbon Block | 12 months | Final chlorine removal before membrane |
| Stage 4 | RO Membrane (50 GPD TFC) | 2–3 years | Monitor via TDS meter |
| Stage 5 | Post-Carbon GAC | 12 months | Final taste polish before tank dispensing |
The 4 included filters cover the Stage 1 sediment pre-filter replacements. Plan a separate purchase for the carbon and post-carbon stages at the 12-month mark and monitor the membrane with a TDS meter — replace when rejection rate drops below 85%.
How to monitor your membrane with a TDS meter →
On the plastic housing
Some reviewers flag the plastic housing as feeling less premium. Functionally, food-grade plastic is standard for residential RO at this price tier and is fit for purpose. The practical concern is installation: don't over-tighten the plastic housing connections. Hand-tight plus a fraction of a turn is the correct technique — over-torquing cracks plastic threads. The NSF certification covers materials safety. If premium feel is a priority, higher-cost systems with stainless components exist, but plastic housing is not a functional issue for most households.
Common questions
What does the FS-TFC include in the box?
The complete unit, a dedicated RO faucet, a pressurized storage tank, feed water adapter, drain saddle, all tubing and fittings, and 4 extra replacement pre-filter cartridges. Everything needed for installation is included — no separate purchases required to get started.
Is the FS-TFC NSF certified?
Yes — NSF certification provides independent third-party verification of the contaminant reduction claims. This is meaningful for confirming the system actually performs as advertised rather than relying solely on manufacturer testing.
How hard is installation?
Moderate — under-sink mounting with standard plumbing is DIY-feasible with basic tools. You need under-sink space for both the unit and the tank, and a faucet hole for the dedicated RO faucet. A plumber is the practical option if you'd rather not work with water supply lines.
Should I be concerned about the plastic housing?
Functionally no — food-grade plastic housing is standard at this price tier. The practical concern is installation: don't over-tighten connections. Hand-tight plus a fraction of a turn is correct. The NSF certification covers materials safety. If premium materials are a priority, higher-priced systems with stainless components exist.