![Rule-A-Matic Plus Float Switch [40A]](https://www.goodmarinebattery.com/wp-content/uploads/2026/08/rule-matic-plus-float-switch-40a.webp)
Description
Rule-A-Matic® Plus Float Switch
Sleek and rugged, the Rule-A-Matic Plus float switch has a strong, fully integrated, impact resistant cover, which protects against debris and jamming. 14 gauge highly abrasive resistant marine grade wire, and a built-in test feature. Designed for pumps drawing upt to 20 Amps Model 40A and 40FA now includes a 2 year warranty.
WARNING: This product can expose you to chemicals including STYRENE which is known to the State of California to cause cancer. For more information go to P65Warnings.ca.gov.
Download Owner’s Manual (PDF)
![Rule 2000 G.P.H. "Gold Series" Bilge Pump [09]](https://www.goodmarinebattery.com/wp-content/uploads/2026/08/rule-2000-g-p-h-gold-series-bilge-pump-09.webp)
![Rule-A-Matic Float Switch [35A]](https://www.goodmarinebattery.com/wp-content/uploads/2026/08/rule-matic-float-switch-35a.webp)
![Rule ECO-Switch Automatic Bilge Pump Switch [39]](https://www.goodmarinebattery.com/wp-content/uploads/2026/08/rule-eco-switch-automatic-bilge-pump-switch-39.webp)
![Rule SuperSwitch Float Switch [37A]](https://www.goodmarinebattery.com/wp-content/uploads/2026/08/rule-superswitch-float-switch-37a.webp)
![Rule 3700 G.P.H. Bilge Pump Non Automatic 12V [14A]](https://www.goodmarinebattery.com/wp-content/uploads/2026/08/rule-3700-g-p-h-bilge-pump-non-automatic-12v-14a.webp)
![Rule Deluxe 3-Way Lighted Rocker Panel Switch [43]](https://www.goodmarinebattery.com/wp-content/uploads/2026/08/rule-deluxe-3-way-lighted-rocker-panel-switch-43.webp)
