Understanding the system
Grey tanks collect water from sinks and showers, depending on RV layout. Grease, hair and soap residue can cause odours, slow drains and unreliable sensors.
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
Identify grey-tank valve and drain route from the RV manual.
Step 2: Prepare equipment
Use sink strainers and keep food scraps and cooking grease out of drains.
Step 3: Perform the procedure
Monitor capacity during showers and dishwashing; conserve water if nearing full.
Step 4: Inspect and verify
Empty at an approved dump station into a secure sewer connection, following site rules.
Step 5: Finish and record
Close the valve and rinse equipment; address persistent odours by checking traps and vents.
Common problems and troubleshooting
| Symptom | Possible cause | What to do |
|---|---|---|
| Shower backs up | Tank full or drain restriction | Stop using fixtures and empty at approved station |
| Odour inside RV | Dry trap, blocked vent or residue | Restore trap water; inspect accessible vent |
| Sensor reads full after emptying | Residue on probes | Use manufacturer-approved cleaning procedure |
Canadian conditions and regulations
Some remote Canadian campgrounds have limited dump facilities; confirm availability before departure. Never discharge grey water onto land without explicit lawful authorization.
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
Periodically clean strainers and check valve seals for seepage.
- 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
- RV Water Pumps: Operation and Troubleshooting
- Connecting RV City Water and Using a Pressure Regulator
- RV Water Heaters: Types, Operation and Common Problems
Grey water rules
Grey water is regulated in Canada and should not be dumped at campsites or on the ground. Use dump stations, and choose biodegradable soaps to reduce odours and residue.