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🚤 Automate your bilge, elevate your voyage—never get caught off guard again!
The Attwood Float Switch converts manual bilge pumps into fully automatic systems with a compact, versatile design that mounts on surfaces up to 24 degrees. Featuring a sealed, moisture-resistant switch and a convenient test knob, it supports 12- and 24-volt systems with up to 12 amps draw. Engineered for marine safety and durability, this CE-rated, mercury-free switch ensures dependable bilge pump activation, reducing maintenance and enhancing onboard security.






| ASIN | B001O0DEDA |
| Actuator Type | Mechanical |
| Best Sellers Rank | #162,787 in Sports & Outdoors ( See Top 100 in Sports & Outdoors ) #151 in Boat Bilge Pumps |
| Brand | attwood |
| Brand Name | attwood |
| Circuit Type | 1-way |
| Color | Black |
| Compatible Devices | Bilge pumps, marine electrical devices with 12 or 24-volt operation and standard wire connection |
| Compatible with Vehicle Type | Boat |
| Connectivity Protocol | X-10 |
| Connector Type | Screw |
| Contact Material | Metal |
| Contact Type | Normally Open |
| Control Method | Touch |
| Control Type | automatic |
| Current Rating | 6 A |
| Customer Reviews | 4.5 out of 5 stars 235 Reviews |
| Global Trade Identification Number | 00022697420176 |
| Included Components | End Product & Information |
| International Protection Rating | IP00 |
| Item Dimensions | 10.25 x 13.75 x 7 inches |
| Item Type Name | boating-tools |
| Item Weight | 1 g |
| Lower Temperature Rating | 1 °C |
| Manufacturer | Attwood |
| Material Type | Plastic |
| Model | 4201-7 |
| Mounting Type | Surface Mount |
| Number of Items | 1 |
| Number of Positions | 2 |
| Operating Voltage | 12 volts |
| Operation Mode | automatic |
| Part Number | 4201-7 |
| Switch Type | Float Switch |
| Terminal | Screw |
| UPC | 022697420176 |
| Unit Count | 1 Count |
| Upper Temperature Rating | 1 °C |
| Warranty Description | 90 days |
| Wattage | 144 watts |
C**H
Ease of installation.
Easy to install. worked perfectly.
J**X
Dependable
Attwood quality, dependable
G**N
Perfect replacement
This pump works well, as it should right? Thing is, we/me wanted an exact replacement of the one that was in the Sea Ray I was working on. You know, same bolt pattern etc. The owner was impressed that I was able to get the same one.
B**T
Very Good But Not Failsafe
IMO there is no such thing as a totally reliable marine bilge pump float switch but this switch is a cut above the rest. The marine environment [wet,damp,corrosive] and conditions between and during use [pounding, vibration,temperature variations etc.] pose a challenge for any mechanical device. The poor old float switch ends up living in or under filthy, oily water, with everything from leaves, sand and rusting fishhooks for companions. Add to that our tendency to set it and forget it until it fails which does not help it either. And when it does fail the consequences are potentially serious. A swamped boat [if it fails to come on] or a dead battery [if it fails to shut off]. I like the Attwood because the float body is fully encased inside the cover, so items won't fall on the float and prevent it from moving freely. It also has a set of grills on either side to allow water to move into the float chamber but prevents larger debris like leaves and twigs from sloshing into contact with the float and interfering with its ability to turn on or off. I also like the manual switch on the side which lets you test the functioning of the switch and the bilge pump each time you use the boat. I also like the fact that Attwood has left the mounting hole structure the same over a long period of time so that when the time does come to replace the switch you won't have to make a new mounting bracket for it. Take this switch out of the bilge as part of your winter maintenance to prevent it from becoming encased in ice which may be in the bilge over winter. Clean it at the same time. Make sure to put a quality heat shrink tube on all the electrical connections and use marine grade connectors for long trouble free life.
G**R
Exact replacement for my boat
Had this switch in my boat, and it works very well. After 4 years of service, the switch failed, so replaced with the same.
B**4
Identical to the old one
Direct, identical replacement for the one in my boat ('02 Four Winns Horizon 190) that stopped working......I kinda expected it to be a discontinued part and I'd have to drill new holes to mount a different model switch....But fortunately that wasn't the case....
R**O
Exact match
I couldn’t find the exact part number so I had to guess. If anyone else has an old model 420f this one is the same exact size.
D**Y
Works as intended
Replaced the exact same model with this one and works as intended. Screw holes and everything fit so no additional holes in my boat
D**.
Bilge pump switch
Atwood is a well respected product , no issues there , works perfectly ,
A**R
Good product as specified
Top seller
F**X
Failing after 6 months
Worked well for 6 months, then not shutting off anymore. Draining the battery by constantly running the bilge pump. Luckily I caught it on time before I lost my boat. Do yourself a favor and buy something else.
G**U
article tel que commandé
livraison rapide et article comme j'avais commandé
B**T
Great value for an important boat part.
Same as the one replaced. Easy to install ! Slow in arriving.
Trustpilot
5 days ago
3 weeks ago