Rule 25DA35A Pump & Switch Combo, 500 GPH

Rule 25DA35A is a 500 GPH submersible bilge pump & float switch combo designed for automatic bilge emptying.

Key Features

• Completely submersible bilge pump
• Ignition protected
• Mercury-free Rule-A-Matic float switch
• Stainless steel shaft
• High abrasion, tin-coated silicone blocked wire
• Includes black flow preventer/check valve

Product Compatibility

• Marine bilge pumping systems
• Automatic/manual bilge emptying setups (float switch activation)

Product Details

• Product: Rule 25DA35A Pump & Switch Combo, 500 GPH
• Combo includes: Rule bilge pump + Rule-A-Matic float switch
• Flow rate: 500 GPH
• Electrical system: 12V (12V kit configuration for this combo)
• Switch: Mercury-free Rule-A-Matic (35A float switch family)
• Construction/features listed: stainless steel shaft; high abrasion, tin coated silicone blocked wire; ignition protected
• Additional component: includes black flow preventer/check valve
• Variant/SKU reference: 29-25DA35A (Shopify variant SKU)
• Barcoded identifier (as provided): 29-25DA35A barcode value present in listing data

Parts Desk Insights

Best Use Case: Ideal for replacing or upgrading a 12V bilge pump setup where you want integrated automatic operation using a Rule-A-Matic float switch.

Common Issues: If the pump cycles erratically, inspect the float switch mounting position and free movement (no snagging) and confirm wiring connections are secure and dry. Also check the inlet/impeller area and the hose routing for restrictions, and verify the check valve/flow preventer is installed to support one-way flow.

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