Conserve water. Protect the asset.
Water is an asset, and on the Central Coast it is a finite one. The pools John Brennan Pools manages are set up to hold their water — through covered surfaces, disciplined filtration, and early leak detection — without compromising clarity or comfort. Principal Technician John Brennan brings over 25 years of hands-on experience to that work; the practice has applied these methods across the Central Coast since 2019.
Where a pool actually loses water.
Before any conservation method earns its place, it helps to know where the water goes. Almost all avoidable loss falls into three areas.
Evaporation
The largest single loss for most pools. An uncovered surface gives water straight back to the air, fastest in hot, dry, and windy conditions — exactly the Central Coast summer profile.
Backwashing
Cleaning a sand filter discharges hundreds of litres each cycle. Done on habit rather than data, it quietly becomes one of the biggest sources of waste in the system.
Leaks & Overflow
Worn fittings, plumbing, and liners lose water unseen, while overfilling and heavy rain spill it over the edge. Both are avoidable with monitoring and a little discipline.
Water is part of the asset. You don't let an asset evaporate. — John Brennan, Practice Lead
The pool cover does the heaviest lifting.
A cover is the single highest-impact water-saving measure available to a pool owner. By placing a barrier between the water and the air, a quality cover cuts evaporation dramatically — and a solar cover retains heat at the same time, lowering running costs across two lines at once. John Brennan Pools fits pool covers matched to each pool and how it is used.
A fitted cover can reduce surface evaporation by up to 90%, meaning less top-up water, fewer chemicals lost to the air, and a warmer pool for longer.
Solar, safety, and mesh covers each serve a different priority — heat retention, child safety, or letting rainwater top the pool while blocking debris. The right choice depends on the property, which is part of the eco-friendly cover conversation the practice has with every client.
Backwash on data, not on habit.
Backwashing is necessary, but it is also where careless routines waste the most water. The rule is simple: backwash a sand filter only when the pressure gauge reads 8–10 psi above its clean baseline. Backwashing to a calendar rather than a gauge sends clean water down the drain for no benefit.
Monitor the gauge and act on the number. Follow each backwash with the rinse cycle on the multiport valve so only clear water returns to the pool.
For owners focused on conservation, a cartridge filter goes further again — it is rinsed by hand rather than backwashed, removing that loss almost entirely. John Brennan Pools can advise where a sand filter still makes sense and where a switch is worthwhile.
A water-wise routine, in six moves.
None of this is complicated. It is consistency applied in the right order — the same approach the practice brings to every pool it manages.
Cover the Pool
Fit a quality cover and use it whenever the pool is idle — especially through summer. This is the largest single saving available.
Watch the Gauge
Backwash only at 8–10 psi above the clean baseline. Monitoring pressure removes the most common cause of avoidable waste.
Run the Bucket Test
Once a month, compare the drop in a bucket against the pool over 24 hours. A faster pool drop points to a leak.
Fill Smart
Top up in the cool of early morning or evening, and use a hose timer so the pool never overfills and spills.
Add Monitoring
Smart controllers and leak-detection systems flag loss in real time, so a small problem is caught before it becomes a costly one.
Landscape for Shade
Windbreaks and considered planting cut wind-driven evaporation, while native species and drip irrigation reduce surrounding water use.
Suspect a leak you cannot find, or want this built into a maintenance plan? Speak to John about repairs and detection.
Most water waste isn't dramatic. It's a habit — backwashing too often, filling at midday, an uncovered pool in January. — John Brennan, Principal Technician
Is your pool quietly wasting water?
If you recognise more than one or two of these, there is room to conserve. Each points to a fix covered above.
An open surface in summer is the fastest avoidable loss — and the easiest to correct with a cover.
If backwashing happens weekly by habit rather than at 8–10 psi, water is going down the drain unnecessarily.
Top-ups more often than evaporation alone would explain are a classic early sign of a leak.
Midday filling loses water to evaporation as it goes in. Cooler hours keep more of it in the pool.
Unattended filling is the usual cause of overflow. A simple hose timer prevents it entirely.
Without a monthly check, a slow leak can run unnoticed for months before the bills make it obvious.
Find the leak early and it's a small repair. Ignore it and you're paying for it every month. — John Brennan, Practice Lead
Water conservation, answered.
How can I reduce water evaporation from my pool on the Central Coast?
Fitting a pool cover is the most effective way to reduce evaporation, cutting surface water loss by up to 90%. John Brennan Pools recommends a solar or thermal cover for most Central Coast pools, used whenever the pool is not in use and particularly through the hot, dry summer months. A cover also retains heat, lowering heating costs alongside water loss.
How often should I backwash my pool filter to save water?
Backwash a sand filter only when the pressure gauge rises 8–10 psi above its clean baseline, not on a fixed weekly schedule. John Brennan Pools advises monitoring filter pressure rather than backwashing out of habit, because each unnecessary backwash discharges hundreds of litres. Cartridge filters reduce this loss further, as they are rinsed by hand rather than backwashed.
How do I know if my pool has a leak?
The bucket test is the simplest way to confirm a pool leak. Fill a bucket with pool water, mark the level inside the bucket and the pool level, and compare both after 24 hours — if the pool level drops further than the bucket, a leak is likely. John Brennan Pools can then carry out professional leak detection to locate and repair the source.
Is a pool cover worth it for saving water and money?
Yes — a pool cover is the single highest-impact water-saving measure for most pools, reducing evaporation by up to 90%. A solar cover fitted by John Brennan Pools also retains heat, which lowers heating costs through the cooler months. Reduced evaporation additionally means less top-up water and fewer chemicals lost to the air.
When is the best time to fill or top up a pool to avoid waste?
Fill or top up a pool during the cooler parts of the day — early morning or late evening — to minimise evaporation loss. John Brennan Pools also recommends fitting a hose timer to prevent overfilling and overflow, and checking water levels after heavy rain. These practices keep the pool at its optimal level without spilling water over the edge.
Can John Brennan Pools help reduce my pool's water usage?
Yes — John Brennan Pools provides water-efficient pool servicing across the NSW Central Coast, including cover fitting, leak detection, filtration upgrades, and smart-monitoring setup. As a specialist practice led by Principal Technician John Brennan, the team applies these conservation methods as part of considered, ongoing maintenance. Call 0491 180 575 to arrange an assessment.
The Eco-Friendly Series.
Uncompromising StandardsA pool that runs leaner, sorted properly.
John Brennan Pools provides water-efficient servicing across the NSW Central Coast — cover fitting, leak detection, filtration upgrades, and considered maintenance held to John's standard. Over 25 years of hands-on experience, owner-led since 2019. No call centres, no upselling — just expert care for your pool as the asset it is.
Written by John Brennan
John Brennan is the Practice Lead and Principal Technician of John Brennan Pools, a specialist pool and spa practice serving the NSW Central Coast since 2019. As Principal Technician, John brings over 25 years of hands-on technical experience — across QLD, the NT, and NSW — in diagnostics, clinical water chemistry, and asset preservation. As Practice Lead, he sets the clinical standards every technician on the team is trained to meet, so every engagement is delivered with the same Master-Level Care.
On water conservation, John's approach is practical and asset-focused: the right cover for the pool, filtration matched to the property, and early leak detection before a small loss becomes a costly one. The practice treats every litre as part of the pool's running cost — and as a share of the Central Coast's finite water supply.
Fully Licensed & Insured · ABN 11 202 829 652 · Contact John
References & Standards We Follow
John Brennan Pools follows recognised water-efficiency guidance and manufacturer specifications when advising on conservation:
- Central Coast Council — local water-use rules, restrictions, and conservation guidance for the region.
- Smart Approved WaterMark — Australia's independent water-efficiency labelling programme for products and services.
- Manufacturer specifications — published efficiency ratings for pool covers, pumps, and filtration systems.
This page offers general guidance only. Always defer to current NSW regulations and accredited professionals for your specific property.
Across the Central Coast.
Full pool servicing across 90+ suburbs — from Umina to Lake Munmorah and everywhere between.
Smart Water Conservation
Smart Water Conservation Techniques for Pools
As water scarcity becomes an increasingly pressing issue worldwide, pool owners are seeking effective ways to conserve water while maintaining the quality and enjoyment of their swimming pools. Implementing water conservation techniques not only helps to reduce water usage but also lowers operational costs and promotes environmental responsibility. This article explores various strategies that pool owners can adopt to minimize water waste and enhance sustainability.
Understanding Water Usage in Pools
Before diving into conservation techniques, it’s essential to understand where water is typically lost in pool systems. Common areas of water loss include:
- Evaporation: A significant amount of water can evaporate from the surface of a pool, especially in hot and dry climates.
- Backwashing: The process of cleaning pool filters often leads to substantial water loss.
- Leaks: Old or damaged pool equipment, plumbing, and liners can lead to unnoticed leaks, resulting in wasted water.
- Overflow: Improper pool filling or maintenance can cause water to overflow, especially during heavy rain or when backwashing.
Use Pool Covers to Minimize Evaporation
One of the most effective ways to conserve water is by using a pool cover. Pool covers can significantly reduce evaporation by creating a barrier between the water surface and the air.
Types of Pool Covers:
- Solar Covers: These covers not only reduce evaporation but also help to retain heat in the pool, reducing heating costs.
- Safety Covers: Designed for safety, these covers prevent accidents while also minimizing water loss.
- Mesh Covers: Allow rainwater to enter while blocking debris, helping to keep the water level up without introducing contaminants.
Key Takeaways:
- Using a pool cover can reduce evaporation by up to 90%.
- Solar covers can help maintain water temperature, saving energy costs.
Actionable Tips:
- Invest in a high-quality pool cover that suits your specific pool type and climate.
- Make it a habit to cover your pool when not in use, especially during hot weather.
Real-World Example:
A family in Gosford installed a solar cover on their pool and reported a 30% reduction in water usage over the summer months, along with significant savings on heating costs.
Efficient Backwashing Techniques
Backwashing is a necessary maintenance process for pool filters, but it can lead to significant water loss if not done efficiently. Here are some techniques to optimize backwashing:
Monitor Filter Pressure: Regularly check the pressure gauge on your filter. A pressure increase of 8-10 psi indicates that it’s time to backwash. Avoid frequent backwashing by monitoring this gauge and only backwashing when necessary.
Use a Multiport Valve: If you have a sand filter, ensure it has a multiport valve that allows you to switch between different functions, including backwash, rinse, and waste. Use the rinse option after backwashing to ensure clean water is returned to the pool.
Consider a Cartridge Filter: Cartridge filters require less frequent backwashing and can be cleaned by simply rinsing them off with a hose. This method saves water compared to traditional sand filters.
Key Takeaways:
- Efficient backwashing can save thousands of gallons of water annually.
- Monitoring filter pressure helps determine the optimal time for backwashing.
Actionable Tips:
- Regularly inspect and maintain your filter system to ensure optimal performance.
- Consider upgrading to a cartridge filter for reduced water waste.
Expert Quote:
“Efficient backwashing is key to maintaining water quality while also conserving water. It’s all about timing and technique.” – John Brennan, Pool Technician
Repair Leaks Promptly
Leaks can lead to significant water loss and increased costs for pool owners. Regularly inspecting your pool for leaks is essential for conservation.
How to Check for Leaks:
- The Bucket Test: Place a bucket filled with water on the pool steps and mark the water level inside the bucket and the pool. After 24 hours, compare the levels. If the pool level has dropped more than the bucket, you may have a leak.
- Visual Inspection: Check the pool’s surface, liner, and equipment for visible signs of leaks or damage.
- Professional Help: If you suspect a leak but can’t find the source, consider hiring a professional to perform a leak detection service.
Key Takeaways:
- Prompt leak detection and repair can save thousands of gallons of water each year.
- Regular inspections help catch leaks before they become major issues.
Actionable Tips:
- Perform the bucket test at least once a month to check for leaks.
- Schedule annual inspections with a pool technician to assess the integrity of your pool.
Real-World Example:
A homeowner in Tumbi Umbi discovered a small leak in their pool system through the bucket test. After repairing the leak, they reported a significant reduction in water usage and lower monthly bills.
Optimize Pool Filling Practices
Improper filling practices can lead to overflow and water waste. Here are some tips to optimize filling:
- Use a Hose Timer: Set a timer on your hose to prevent overfilling. This simple device can help you avoid excess water that may spill over the edges.
- Fill During Cooler Hours: Filling your pool during the cooler parts of the day can minimize evaporation, especially in hot climates. Early mornings or late evenings are the best times to fill your pool.
- Maintain Water Levels: Regularly check and maintain water levels, especially after heavy rains. This practice helps prevent overflows and unnecessary water loss.
Key Takeaways:
- Using a hose timer can prevent overflow and water waste.
- Filling during cooler parts of the day minimizes evaporation losses.
Actionable Tips:
- Purchase a hose timer to manage filling times effectively.
- Monitor water levels regularly to maintain optimal levels.
Expert Quote:
“Simple practices like using a hose timer can drastically reduce water waste and keep your pool at the right level.” – John Brennan, Pool Technician
Implement Smart Pool Technology
Smart technology can help pool owners monitor and manage water usage more efficiently. Here are some technologies to consider:
- Smart Controllers: These devices monitor water chemistry and automatically adjust chemical levels, which can help maintain optimal conditions while minimizing water waste.
- Leak Detection Systems: Advanced leak detection systems can alert you to water loss in real time, helping you address issues immediately before they escalate.
- Pool Automation Systems: Automating maintenance tasks, such as cleaning and water circulation, can ensure that your pool operates efficiently, conserving both water and energy.
Key Takeaways:
- Smart technology enhances water management and conservation.
- Leak detection systems can prevent significant water loss.
Actionable Tips:
- Research smart pool technology options that fit your pool type and needs.
- Consider investing in leak detection systems to monitor water loss.
Real-World Example:
A homeowner in Wadalba installed a smart controller and leak detection system, which allowed them to monitor water usage from their smartphone. They reported significant water savings and improved peace of mind.
Landscape Wisely Around Your Pool
Landscaping can impact water usage in and around your pool. Proper planning can reduce water evaporation and loss:
- Use Native Plants: Incorporate drought-resistant and native plants in your landscaping. These plants require less water and maintenance, helping to conserve water overall.
- Install Drip Irrigation: If you have garden beds near the pool, consider using drip irrigation systems. These systems deliver water directly to the roots of plants, minimizing waste.
- Create Windbreaks: Strategically placed trees or shrubs can act as windbreaks, reducing evaporation rates from the pool surface.
Key Takeaways:
- Native plants reduce water consumption and enhance biodiversity.
- Windbreaks can help minimize pool evaporation.
Actionable Tips:
- Plan your landscaping with water conservation in mind.
- Research native plants that thrive in your climate for effective landscaping.
Expert Quote:
“A well-planned landscape can significantly reduce water evaporation from your pool, making a big difference in overall water conservation.” – John Brennan, Pool Technician
Conclusion
Water conservation techniques are essential for pool owners looking to reduce their water usage and promote sustainability. From using pool covers and efficient backwashing methods to repairing leaks and optimizing filling practices, there are numerous strategies available to help conserve water. By implementing these techniques, pool owners can not only save money but also contribute to a more sustainable future. As we face increasing challenges related to water scarcity, every drop counts, and responsible pool ownership can make a meaningful difference.
We offer Full Pool & Spa Servicing in
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