Corded Robots That Scrub the Waterline for Under $1,500
The waterline is where oils, sunscreen and pollen collect into the grey ring every pool gets, and it is the one surface the pump and skimmer never touch. Corded robots still have one real advantage over battery ones for this job: they never run out halfway through a waterline pass. Under $1,000 only one corded robot in this catalog scrubs the waterline at all, so this list stops at $1,500, where the choice widens to both of the big pool-trade brands.
How this list is ordered: Corded robots whose maker lists waterline scrubbing, priced under $1,500, ordered by price. 7 of the catalog’s robots qualify.

1Dolphin
~$999Dolphin Nautilus CC Pro
Adding waterline scrubbing and a 50-foot rating to the Nautilus line is what the CC Pro is for.
- Warranty
- 1 yr
- Pool fit
- No cable length published
- Filtration
- No micron figure published

2Polaris
~$1,149Polaris EPIC 8642 iQ
Continuous treads and a double-helix brush make the EPIC 8642 iQ the Polaris for steep walls, steps and main drains.
- Cable
- 60 ft
- Pool fit
- ~52 ft
- Filtration
- No micron figure published

3Dolphin
~$1,329Dolphin Explorer E50
Where the Nautilus line tops out at one year of cover, the Explorer E50 carries two.
- Warranty
- 2 yr
- Pool fit
- No cable length published
- Filtration
- No micron figure published

4Dolphin
~$1,349Dolphin Nautilus CC Supreme
Three brushes, a 2.5-hour default cycle and both a fine and an ultra-fine filter kit in the box put the CC Supreme at the top of the Nautilus range.
- Warranty
- 1 yr
- Pool fit
- No cable length published
- Filtration
- No micron figure published

5Dolphin
~$1,499Dolphin S300
Sold mostly through pool dealers, the S300 is also on Maytronics' own store, and it is one of the few Dolphins whose spec block lists a caddy in the box.
- Warranty
- 2 yr
- Pool fit
- No cable length published
- Filtration
- No micron figure published

6Polaris
~$1,499Polaris VRX iQ+
Polaris' flagship corded robot runs a SMART cycle that sizes up the pool and sets its own cleaning time, reports to the iAquaLink app, and climbs to the waterline at the touch of a button so it can be lifted out already draining.
- Cable
- 70 ft
- Pool fit
- ~62 ft
- Filtration
- No micron figure published

7Polaris
~$1,499Polaris ALPHA iQ+
In Polaris' spec tables the ALPHA iQ+ matches the VRX iQ+ line for line — 70-foot cable, five-litre lit canister, Easy Lift, caddy, app scheduling — with a mode list that names floor, floor/wall/waterline, waterline-only and custom cycles.
- Cable
- 70 ft
- Pool fit
- ~62 ft
- Filtration
- No micron figure published
Other shortlists
- Cordless Robots With the Battery for a 16 × 32 In-Ground Pool
- Robots Rated for Above-Ground Pools
- Robots That Filter Fine Dust and Algae (50 Microns or Finer)
- The Easiest Robots to Get Out of the Pool
- Solar Robotic Skimmers, by Filter Mesh
- Floor Robots With the Lowest Cost per Warranty Year
- Cordless Robots Rated for Bigger Pools Than Their Battery Covers