Opening an inground pool involves more than removing the winter cover. The winter plugs and fittings must be removed, the equipment reconnected, the circulation system started and the pool checked for visible leaks or operating problems.
A professional pool opening handles the mechanical start-up work, but it does not necessarily leave the water clear, balanced and ready for swimming on the same day.
Here is what Ontario homeowners should expect before, during and after a professional pool opening.
When Should You Open Your Pool?
Many Ontario pools are opened in spring once the risk of prolonged freezing conditions has eased.
Waiting too long can allow warm, stagnant water to encourage algae growth beneath the winter cover. Opening earlier gives the circulation and sanitation systems time to restore the water before swimming season.
The best timing depends on:
- Weather
- Water temperature
- Tree debris
- Cover type
- Pool condition
- Planned swimming date
- Contractor availability
Spring schedules fill quickly, so book in advance if you want the pool opened during a particular week.
What Is Included in a Professional Pool Opening?
Earthworks’ standard inground pool-opening service focuses on uncovering the pool and restarting the essential equipment.
The service includes:
- Removing and folding the winter cover
- Removing winter plugs
- Reinstalling return fittings
- Rinsing and reinstalling the skimmer basket
- Reconnecting and starting the pump
- Reconnecting and starting the filter
- Reconnecting and starting the heater
- Starting the salt system or chemical feeder
- Priming the pump
- Beginning water circulation
- Inspecting the system for visible leaks or operating issues
Pools with attached spas, large water features, swim jets or specialized cover systems may require additional time or charges.
Confirm what is included when booking, especially if the pool has equipment or features beyond a standard circulation system.
What Is Not Included?
A mechanical pool opening should not be confused with a complete cleaning and water-balancing service.
Earthworks’ standard opening does not include:
- Vacuuming the pool
- Brushing the walls or floor
- Removing debris from the pool
- Water testing
- Water balancing
- Ongoing chemical treatment
- Equipment repairs
- Filter cleaning
- Filling the pool
An opening chemical treatment can be added when booking, but this does not replace testing and balancing the water.
Homeowners should expect to complete additional cleaning and water-care work after the circulation system has started.
How to Prepare Before the Appointment
Preparing the pool before the crew arrives helps prevent delays.
Before the scheduled opening:
- Fill the pool to its normal operating level
- Make sure electricity is available
- Provide access to an outdoor water supply
- Clear access to the pool and equipment area
- Unlock gates
- Keep pets safely inside
- Leave out the return fittings
- Leave out the skimmer basket
- Leave out any removable filter components
- Identify any equipment changes or known problems
- Remove stored items from the equipment area
Do not leave the water level low and expect the pump to operate normally. If the pool cannot circulate, the opening may not be completed.
If the winter cover contains significant standing water or heavy debris, ask whether anything needs to be done before the appointment.
Removing the Winter Cover
The crew removes the winter cover and folds it for storage.
The process varies by cover type. Safety covers, clip-in covers and traditional tarp-and-water-bag systems require different handling.
Some dirt and debris may enter the pool while the cover is removed. This is normal and is one reason why vacuuming and cleaning are usually required after the opening.
The cover should be allowed to dry before long-term storage whenever possible. Storing it wet or dirty can encourage staining, odours and deterioration.
Inspect the cover for:
- Tears
- Damaged straps
- Loose stitching
- Worn springs
- Missing hardware
- Areas that no longer fit securely
Problems found in spring should be addressed before the pool is closed again in fall.
Reconnecting the Pool Equipment
Equipment connections that were removed or opened during winterization must be restored before the system can operate.
The technician may reconnect or restart:
- Pump
- Filter
- Heater
- Salt-chlorine generator
- Chemical feeder
- Return fittings
- Skimmer components
- Drain plugs
- Pressure gauges
The pump is then primed and circulation begins.
Water may initially appear cloudy or dirty as the system starts moving debris and winter water through the pool. The filter will require monitoring as the water clears.
Checking for Leaks and Operating Problems
Once the equipment is running, the crew checks for visible leaks and obvious operating concerns.
Potential problems include:
- Dripping plumbing connections
- Pump seals leaking
- Air entering the circulation system
- Low or inconsistent water flow
- Unusual equipment noise
- Heater ignition problems
- Filter pressure concerns
- Salt-system warnings
- Cracked fittings or winter damage
The opening visit is a visual operating check, not a comprehensive equipment-repair appointment.
If a problem is discovered, additional diagnosis, parts or service may be required. Earthworks primarily provides repair support for existing customers rather than promoting general repair service to new clients.
Will the Water Be Ready for Swimming?
Usually not immediately.
After several months without normal circulation, the water may require:
- Debris removal
- Vacuuming
- Brushing
- Filtration
- Water testing
- Chemical adjustment
- Shock treatment
- Salt adjustment
- Several days of circulation
Do not judge the opening solely by the appearance of the water when the cover first comes off. The purpose of the opening appointment is to restart the system so the cleaning and balancing process can begin.
Never swim until the water is clear enough to see the bottom, the chemistry is properly balanced and the pool is safe to use.
What to Do After the Opening
Once the system is running:
- Test the water.
- Balance alkalinity and pH as required.
- Adjust sanitizer levels.
- Confirm the salt level before relying on the salt system.
- Remove leaves and debris.
- Brush and vacuum the pool.
- Monitor filter pressure.
- Clean the filter when required.
- Recheck the equipment area for leaks.
- Install ladders, rails and accessories safely.
Continue monitoring the water during the first week. Spring water conditions can change quickly as debris is removed and the pool warms.
Common Pool-Opening Problems
The pump will not prime
The water level may be too low, a winter plug may remain installed, a connection may be loose or air may be entering the system.
The filter pressure is high
Spring debris can load the filter quickly. The filter may require cleaning after the system has circulated.
The heater will not start
Low water flow, gas or electrical issues, control settings or equipment faults can prevent heater operation.
The salt system shows low salt
Salt readings can be affected by cold water. Test the actual salt level before adding a large amount.
The pool is green
Green water usually requires circulation, filtration, brushing, debris removal and appropriate chemical treatment. Severe conditions will not clear immediately.
Book Your Pool Opening Early
A professional opening gets the circulation system reconnected and running so you can begin preparing the water for swimming season.
Earthworks provides scheduled inground pool openings in Burlington, Oakville and nearby service areas. Current pricing, available add-ons and preparation requirements are listed on our pool-opening service page.
Book your professional pool opening or review the service details before choosing your preferred week.
