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Aug 06, 2025 - 07:52 AM
1. Basic Checks for Zebra RV R3700-PW Dual Flow Combo Water Pump: Ensure Sufficient Water Supply: Confirm that your RV's fresh water tank is full or connected to a city water source. The Zebra RV R3700-PW needs water to function properly. Check the Water Pump Switch: Make sure the switch is on and operational. If it’s not lighting up or responding, inspect the fuse or breaker. Inspect Power Supply: Verify that your RV's 12V battery is fully charged, as the pump depends on it. A weak battery might not power the Zebra R3700-PW effectively. Look for Blown Fuses or Tripped Breakers: Common in RVs, check the fuse box or circuit breaker panel and address any blown fuses or tripped breakers linked to the water pump. 2. Addressing Air in the System: Release Trapped Air (Airlock): Open all faucets, including the shower and toilet, to let trapped air escape. This is crucial for the Zebra R3700-PW to prime properly. Check for Air Leaks: Inspect the suction line for leaks, as air leaks can hinder priming. Listen for hissing sounds or use soapy water to detect leaks. 3. Inspecting for Obstructions: Check the Water Filter/Strainer: The Zebra R3700-PW includes an inlet filter to block debris. Examine it for clogs or sediment and clean or replace it if necessary. Examine Water Lines for Blockages: Look for kinks or obstructions in the water lines, especially on the suction side. 4. More Advanced Troubleshooting: Test the Pump Directly: Disconnect the water line on the pressure side and use a bucket to test the pump. If water trickles out, the pump may be faulty. Inspect Pump Components: If the pump runs but doesn’t pump effectively, check the diaphragm and impeller for damage. Backflow Issues: Ensure the water pump strainer is correctly seated to prevent backflow, which can affect priming. 5. Potential Causes of Loss of Prime Between Uses: Leaking Foot Valve: Some pumps, like the Zebra R3700-PW, have a foot valve to retain water in the intake line. A leaking valve can cause loss of prime.
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