Pool equipment is not something most homeowners think about before they own a pool. You think about the pool itself, the patio, maybe the landscaping. The equipment pad behind the fence is an afterthought.
But the equipment is what keeps the water clean, circulating, and safe to swim in. Choosing the right pump, filter, and sanitizer affects your electricity bill, your maintenance routine, and how long everything lasts. This article explains each piece so you know what you are paying for and why it matters.
How does the pool circulation system work?
A pool's circulation system moves water in a continuous loop. Water leaves the pool through the skimmers (rectangular openings in the pool wall near the waterline) and the main drain (at the deepest point of the pool). It flows through pipes to the equipment pad, where it passes through the pump, then the filter, then any heater or sanitizer, and finally returns to the pool through return jets in the pool walls.
This cycle needs to happen continuously during the swimming season. The general rule is that all the water in the pool should pass through the filter at least once every 8 to 12 hours. That is called the "turnover rate."
If the water stops circulating, chemicals cannot distribute evenly, the filter cannot remove debris, and algae can start growing within days. A properly sized and functioning circulation system is the foundation of pool maintenance.
What does the pool pump do?
The pump is the heart of the circulation system. It creates the suction that pulls water from the pool and pushes it through the filter and back. Without the pump, nothing moves.
Pool pumps are measured in horsepower (HP). Most residential pools use pumps between 1.0 and 2.0 HP. The right size depends on the pool volume, the length of the plumbing runs, and how many features (water features, spa jets, etc.) the pump needs to supply.
There are two main types of pool pumps: single speed and variable speed.
Variable speed vs single speed: what is the difference?
A single-speed pump has one speed. It is either on at full power or off. When it is on, it moves water at maximum flow and uses maximum electricity.
A variable-speed pump can run at different speeds. You can set it to run at a low speed for daily filtration, a medium speed for regular circulation, and a high speed only when needed (like running a waterfall or vacuuming). Most of the time, it runs at a fraction of its maximum power.
This matters because of how electricity works. Running a pump at half speed does not use half the electricity. It uses roughly one-eighth the electricity. This is because energy consumption follows the "affinity laws" of physics, where power consumption changes with the cube of the speed.
| Feature | Single Speed | Variable Speed |
|---|---|---|
| Purchase cost | $800 - $1,200 | $1,800 - $3,000 |
| Annual electricity cost | $800 - $1,400 | $200 - $500 |
| Noise level | Loud (always at full speed) | Quiet (usually at low speed) |
| Typical lifespan | 5 - 8 years | 8 - 12 years |
| Payback period | N/A | 1 - 2 years |
| 10-year electricity cost | $8,000 - $14,000 | $2,000 - $5,000 |
The savings are not small. Over 10 years, a variable-speed pump can save $6,000 to $9,000 in electricity costs. It also runs quieter, which your neighbours will appreciate, and lasts longer because the motor is not always running at full load.
Most pool companies now install variable-speed pumps as standard. If a company quotes you a single-speed pump in 2026, ask why. In Ontario, variable-speed pumps also comply with upcoming energy efficiency regulations, while single-speed pumps above 1 HP may not.
What are the different types of pool filters?
The filter removes particles and debris from the water. There are three common types, and each works differently.
Cartridge filters
A cartridge filter uses a pleated fabric cartridge (similar to a car air filter) to trap particles. Water flows through the cartridge, and debris is caught in the folds of the fabric.
- Filtration level: 10 to 15 microns (very fine)
- Maintenance: Hose off the cartridge 3 to 4 times per season. Replace the cartridge every 2 to 4 years ($150 to $400).
- No backwashing: Cartridge filters do not waste water through backwashing, which is better for your water bill and for areas with water restrictions.
- Cost: $400 to $1,000 for the filter unit.
Cartridge filters are the most popular choice for residential fiberglass pools. They are easy to maintain, filter the water finely, and do not waste water.
Sand filters
A sand filter uses a bed of specially graded silica sand to trap particles. Water flows through the sand from top to bottom, and debris is caught between the sand grains.
- Filtration level: 20 to 40 microns (less fine than cartridge)
- Maintenance: Backwash the filter every 1 to 2 weeks by reversing the water flow to flush out trapped debris. Replace the sand every 5 to 7 years ($200 to $400).
- Simple and durable: Sand filters have been around for decades. They are straightforward and hard to mess up.
- Cost: $350 to $800 for the filter unit.
Sand filters are simpler but filter less finely. They also require regular backwashing, which wastes 200 to 300 litres of water each time. Over a season, that adds up.
DE (Diatomaceous Earth) filters
A DE filter uses a fine powder made from fossilized diatoms (tiny marine organisms) coated on fabric grids. This creates an extremely fine filtration surface.
- Filtration level: 3 to 5 microns (the finest available)
- Maintenance: Backwash and add fresh DE powder regularly. Disassemble and clean the grids once or twice per season. Replace grids every 5 to 8 years ($300 to $600).
- Best water clarity: DE filters produce the clearest water of any filter type.
- Cost: $500 to $1,200 for the filter unit.
DE filters are the most effective but also the most labour-intensive to maintain. They are less common on residential pools because most homeowners prefer the simpler maintenance of a cartridge filter.
Which filter should you choose?
| Filter Type | Filtration (microns) | Unit Cost (CAD) | Maintenance |
|---|---|---|---|
| Cartridge | 10 - 15 | $400 - $1,000 | Low (hose off a few times/season) |
| Sand | 20 - 40 | $350 - $800 | Moderate (backwash every 1-2 weeks) |
| DE | 3 - 5 | $500 - $1,200 | High (backwash + add DE powder) |
For most fiberglass pool owners, a cartridge filter is the best balance of performance and ease of maintenance. That is what we install on the majority of our projects.
What do skimmers and return jets do?
Skimmers and return jets are the plumbing connections between the pool and the equipment. They are built into the pool wall during installation.
Skimmers
Skimmers are rectangular openings near the waterline, fitted with a floating weir (a small door that adjusts to the water level). They pull surface water into the circulation system, which is where most debris (leaves, bugs, pollen) collects. A basket inside the skimmer catches larger debris before it reaches the pump.
Most residential pools have one or two skimmers, depending on pool size. A pool under 40,000 litres typically has one skimmer. Larger pools have two.
Return jets
Return jets (also called eyeball fittings) are the openings where filtered, treated water flows back into the pool. They are positioned around the pool walls to create a circulation pattern that moves water toward the skimmers.
Most pools have two to four return jets. They can be aimed to direct water flow, which helps distribute chemicals evenly and push debris toward the skimmers.
Main drain
The main drain sits at the deepest point of the pool floor. It pulls water from the bottom of the pool, which helps with circulation in the deep end and ensures chemicals reach all levels of the water. Modern main drains are anti-entrapment compliant, meaning they are designed to prevent suction-related injuries.
How does sanitization work?
The sanitizer is what kills bacteria and algae in the pool water. There are two common approaches for residential pools.
Traditional chlorine
Chlorine is added to the pool manually (tablets, granules, or liquid) or through an automatic chlorinator that slowly dissolves tablets as water flows through it. Chlorine kills bacteria, oxidizes organic matter, and prevents algae growth.
A standard chlorinator costs $200 to $400. Chlorine tablets or liquid cost roughly $200 to $400 per season.
Salt water chlorination
A salt water system uses a salt chlorine generator (also called a salt cell) that converts dissolved salt into chlorine through electrolysis. The pool water feels softer, there is no strong chlorine smell, and the chlorine production is continuous and automatic.
A salt water system costs $2,500 to $4,500 installed. The salt cell needs to be replaced every 3 to 7 years at a cost of $800 to $1,200. Salt costs about $50 to $100 per season. You can read more about the differences in our article on saltwater vs chlorine pools.
How do you size equipment for your pool?
Equipment sizing is based on your pool volume and the plumbing layout. The goal is to achieve a turnover rate (all the water passing through the filter) of 8 to 12 hours.
| Pool Volume | Pump Size | Filter Size |
|---|---|---|
| Under 35,000 litres | 1.0 - 1.5 HP variable speed | 200 - 300 sq ft cartridge |
| 35,000 - 55,000 litres | 1.5 - 2.0 HP variable speed | 300 - 425 sq ft cartridge |
| Over 55,000 litres | 2.0 - 3.0 HP variable speed | 425 - 525 sq ft cartridge |
Oversizing the filter is generally fine. A bigger filter means slower water flow through the filter media, which actually improves filtration and extends the time between cleanings. Oversizing the pump is less ideal, as it can create too much flow through the plumbing and waste energy.
Your installer should calculate the exact sizing based on your pool model, the length of the plumbing runs from the pool to the equipment pad, and any features that require additional flow (waterfalls, spa jets, etc.).
What optional equipment upgrades are available?
Beyond the basic pump, filter, and sanitizer, there are several upgrades that many homeowners add:
- Pool heater ($4,500 to $9,000) -- Extends the swim season by weeks or months. Gas heaters heat fast, heat pumps cost less to run. See our full guide on pool heaters.
- Automatic pool cover ($15,000 to $25,000) -- Motorized safety cover that also retains heat and reduces evaporation. See our article on automatic pool covers.
- Pool automation ($2,000 to $5,000) -- Control the pump, heater, lights, and other equipment from a wall panel or smartphone app. Useful for scheduling and remote monitoring.
- LED pool lights ($800 to $2,500) -- Colour-changing or white underwater lights. Most fiberglass pool shells come pre-plumbed for one or two lights.
- Robotic pool cleaner ($1,000 to $2,500) -- An independent unit that scrubs the pool floor and walls. Runs on its own power and does not connect to the circulation system.
What does all of this cost?
Here is a summary of typical equipment costs for a fiberglass pool in Ontario:
| Equipment | Cost Range (CAD) |
|---|---|
| Variable-speed pump | $1,800 - $3,000 |
| Cartridge filter | $400 - $1,000 |
| Chlorinator or salt system | $200 - $4,500 |
| Plumbing (pipes, fittings, valves) | $1,500 - $3,000 |
| Electrical (panel, wiring, GFCI) | $1,500 - $3,000 |
| Basic package total | $5,000 - $8,000 |
| Add heater | + $4,500 - $9,000 |
| Add salt water system | + $2,500 - $4,500 |
| Add automation | + $2,000 - $5,000 |
| Full package total | $15,000 - $25,000 |
Most homeowners land somewhere between the basic and full packages. A variable-speed pump, cartridge filter, salt water system, and heat pump is a popular mid-range combination that typically costs $12,000 to $18,000 installed.
How do you maintain pool equipment?
Pool equipment does not need daily attention, but it does need regular care to last its full lifespan.
- Pump: Empty the strainer basket weekly. Check for air leaks at the lid and fittings. Listen for unusual sounds. Variable-speed pumps should be programmed to the correct schedule for your pool.
- Filter: Clean the cartridge or backwash the sand/DE filter when the pressure gauge reads 8 to 10 PSI above the clean starting pressure. For cartridge filters, this is typically every 2 to 4 weeks during swimming season.
- Salt cell: Inspect every 3 months for calcium buildup. Clean with a mild acid solution if needed. Most modern salt systems have a self-cleaning function.
- Heater: Have a technician inspect and service the heater once per year, ideally during the spring opening.
- Winterization: All equipment must be properly winterized in October. This means draining water from the pump, filter, heater, and plumbing lines to prevent freeze damage.
What are the most common equipment mistakes?
- Choosing a single-speed pump to save money upfront. The electricity savings from a variable-speed pump pay for the price difference in 1 to 2 years. After that, it is pure savings.
- Undersizing the filter. A filter that is too small clogs quickly, requires more frequent cleaning, and does not filter as effectively. Go one size up if you are between sizes.
- Not running the pump long enough. The pump needs to turn over the entire pool volume at least once per day. Cutting run time to save electricity can lead to poor water quality and algae problems.
- Ignoring the pressure gauge. When the filter pressure rises 8 to 10 PSI above the clean baseline, it is time to clean the filter. Running with a dirty filter strains the pump and reduces water quality.
- Skipping winterization. Freeze damage to pumps, filters, and heaters is expensive to repair and completely preventable. Every piece of equipment must be properly drained before winter.
Frequently Asked Questions
Is a variable-speed pool pump worth the extra cost?
Yes. A variable-speed pump costs $1,800 to $3,000, compared to $800 to $1,200 for a single-speed pump. But it saves $500 to $800 per year in electricity. The extra upfront cost pays for itself in 1 to 2 years, and the pump lasts longer because it runs at lower speeds most of the time.
What type of pool filter is best for a fiberglass pool?
Cartridge filters are the most common choice for fiberglass pools. They filter down to 10 to 15 microns, require no backwashing, and are easy to clean by hosing off the cartridge a few times per season. Sand filters are simpler but filter less finely. DE filters provide the finest filtration but require the most maintenance.
How much does a full pool equipment package cost?
A basic equipment package with a variable-speed pump, cartridge filter, and chlorine sanitizer costs $5,000 to $8,000 CAD installed. Adding a salt water system adds $2,500 to $4,500. A heater adds another $4,500 to $9,000. A full equipment package with all upgrades can run $15,000 to $25,000.
How long should a pool pump run each day?
A pool pump should circulate the entire pool volume at least once every 8 to 12 hours. With a variable-speed pump, you can run it at a low speed for 10 to 14 hours per day and use very little electricity. A single-speed pump achieves the same turnover in 6 to 8 hours but uses much more energy per hour.
How often do pool filters need to be replaced?
Cartridge filters need new cartridges every 2 to 4 years, at a cost of $150 to $400. Sand filters need new sand every 5 to 7 years, costing $200 to $400 for the sand plus labour. DE filters need new grids every 5 to 8 years at $300 to $600. Between replacements, regular cleaning keeps them working properly.
