Understanding the system
Most RV water pumps are 12V demand pumps that switch on as pressure drops. A pump that runs continuously may indicate an empty tank, air leak, open fixture, leaking line or failed pressure switch.
Preparation and equipment
Before starting, find the owner manual and identify the relevant inlets, shutoff valves, tank controls and component model numbers. Keep potable-water hoses separate from waste equipment. Check whether campground water and dump facilities are available and read posted site rules.
Step-by-step procedure
Step 1: Identify the system
Confirm fresh-water level and pump switch position.
Step 2: Prepare equipment
Check accessible strainer and inlet for debris, with the pump switched off.
Step 3: Perform the procedure
Open a cold-water tap briefly to purge air using the owner-manual priming procedure.
Step 4: Inspect and verify
Inspect visible hose connections and fixtures for leaks; never run a pump dry for extended periods.
Step 5: Finish and record
If cycling persists with all taps shut, switch off and seek a technician to test pressure switch and hidden leaks.
Common problems and troubleshooting
| Symptom | Possible cause | What to do |
|---|---|---|
| Pump runs but no flow | Empty tank, lost prime or blocked strainer | Check water level and manual priming sequence |
| Pump pulses with taps closed | Leak or pressure switch fault | Inspect visible fixtures and isolate system |
| Pump silent | Switch, fuse, wiring or pump fault | Check user-serviceable fuse; request diagnosis |
Canadian conditions and regulations
Water trapped in the pump housing can freeze and crack. Follow the RV winterization procedure, including pump and strainer.
Campground drinking-water notices, local wastewater bylaws, and provincial or territorial public-health requirements vary. Always follow the posted instructions at the specific facility. Do not assume that a remote tap is potable or that wastewater can be discharged on the ground.
Ongoing maintenance
Clean inlet strainers at intervals recommended by the pump maker.
- Check accessible fittings, valves and tank indicators before each trip.
- Keep a dedicated drinking-water hose, clean fittings and separate wastewater equipment.
- Record winterization, sanitizing and filter-replacement dates.
- Inspect for hidden dampness after freeze-thaw periods or a plumbing fault.
Canadian and technical references
Consult Health Canada drinking-water resources, Public Health Agency of Canada, local public-health and campground notices, and your RV manufacturer’s plumbing and appliance manuals. Links are general reference starting points, not substitutes for local requirements.
Related plumbing guides
- RV Fresh-Water Tanks: Filling, Care and Storage
- Connecting RV City Water and Using a Pressure Regulator
- RV Water Heaters: Types, Operation and Common Problems
- RV Grey-Water Tanks: Odours, Sensors and Draining
Pump problems in cold weather
A pump that runs but builds no pressure may have a frozen line, a clogged strainer or an air leak. Check for ice, inspect the inlet filter and look for loose fittings.
Hands-on repair steps: see our RV plumbing repair guide.