Knowing when and how to drain pool water is one of the most important skills a Mesa homeowner can have. However, many pool owners make costly errors during this process. A simple mistake can crack your shell, damage your equipment, or leave you with a floated pool shell that needs major repair.
If you need to drain pool water this season, it pays to understand what can go wrong before you start. Furthermore, Arizona’s extreme heat and unique soil conditions make draining even riskier here than in other states. The East Valley climate demands extra caution every step of the way.
At Valley Pool Service, our Gilbert-based technicians see draining mistakes every season. Therefore, we put together this guide to help Mesa, Chandler, Gilbert, and Queen Creek homeowners avoid the most common pitfalls. Read on before you touch that drain valve.
Why Pool Draining Is Riskier in Arizona Than You Think
Arizona’s desert soil behaves very differently from soil in other climates. Because of this, draining your pool here carries risks that catch many homeowners off guard. The ground can shift, swell, or push back against an empty shell in ways that cause serious structural damage.
Additionally, Mesa and the surrounding East Valley experience intense heat for much of the year. An empty pool shell sitting in direct summer sun can warp, crack, or blister within hours. Therefore, timing your drain is not just a preference — it is a necessity.
The Hydrostatic Pressure Problem
Hydrostatic pressure refers to the force that groundwater exerts upward against your pool shell. When your pool is full, the water weight holds the shell in place. However, when you drain pool water completely, that downward weight disappears.
As a result, groundwater pressure can literally push your pool shell up out of the ground. This is called “pool floating,” and it causes catastrophic structural damage. Moreover, repairs after a floated pool are extremely expensive and time-consuming.
Mesa and parts of Chandler have soil and water table conditions that make this risk real. Therefore, always consult a professional before you fully drain pool water in these areas. A technician can assess your specific risk level before work begins.
Mistake #1: Draining During the Wrong Time of Year
One of the most common mistakes Mesa pool owners make is draining at the wrong time. Summer is the worst possible season to drain pool water in Arizona. The intense heat can cause immediate damage to your exposed pool surface and equipment.
Additionally, pool surfaces like plaster and pebble finishes need to stay wet. Direct sun exposure dries them out quickly and causes cracking. Furthermore, pool decking and surrounding materials can expand and buckle without the cooling effect of pool water nearby.
When Is the Right Time to Drain?
The best time to drain pool water in Mesa or Gilbert is during the cooler months. Late fall and early spring offer mild temperatures that protect your pool shell during the process. However, even then, you should never leave the pool empty for longer than necessary.
In addition, avoid draining during or right after heavy rain. Arizona monsoon season raises the water table significantly. Therefore, draining during monsoon months dramatically increases your hydrostatic pressure risk.
Mistake #2: Draining Too Quickly or Using the Wrong Method
Another mistake homeowners make is draining pool water too fast or using the wrong equipment. Your pool’s main drain is not designed to fully empty the pool. Therefore, using it as your only drain method often leads to pump damage or incomplete draining.
Moreover, draining too quickly can stress your pool shell. It also puts excessive strain on your pump and filter system. The result is unnecessary wear on equipment that may already be working hard during Arizona’s long pool season.
Submersible Pumps and Safe Draining Practices
Most professionals use a submersible pump to drain pool water safely and at a controlled rate. This method gives you better control over the draining speed. Also, it reduces the risk of damaging your existing plumbing and filtration equipment.
However, even with the right equipment, you need to monitor the process closely. Never leave a draining pool unattended for long periods. Additionally, make sure you are directing the water to an approved discharge point, as Mesa and surrounding cities have rules about discharge locations for pool water.
Mistake #3: Ignoring Local Regulations on Water Disposal
Many homeowners do not realize that draining pool water into the street or a storm drain is regulated. Mesa, Gilbert, Chandler, and Queen Creek all have guidelines about where pool water can be discharged. Violations can result in fines or citations from local authorities.
Furthermore, pool water treated with chemicals can harm local drainage systems and landscaping. Chlorine, algaecides, and pH adjusters need to be neutralized before discharge in many cases. Therefore, always check with your local municipality before you drain pool water onto city property.
How to Dispose of Pool Water Properly
The safest option is usually to discharge into your home’s sanitary sewer cleanout. This keeps chemically treated water out of storm drains and natural areas. However, always verify this is permitted in your specific area before proceeding.
Additionally, you may need to stop adding chemicals well in advance of draining. This allows chlorine and other sanitizers to dissipate to safe levels. A pool professional can test your water and confirm when it is ready for discharge.
Mistake #4: Failing to Prep the Pool Before Draining
Skipping preparation steps is another mistake that costs homeowners time and money. Before you drain pool water, there are several important tasks to complete. Overlooking these steps often leads to equipment damage or a harder refill process later.
First, turn off your pool heater at least 24 hours before draining begins. Next, shut off your automatic chlorinator or chemical feeder. Then, turn off your pump at the right time during the drain to avoid running it dry, which can burn out the motor quickly.
Equipment Checks Before You Drain
Also, inspect your pool equipment before starting the drain. Look for any leaks, cracks, or worn seals that could worsen during the draining process. Moreover, check that your backwash valve and multiport valve are in the correct positions.
In addition, remove any automatic pool cleaners and accessories from the pool before draining. These items can be damaged if left in an emptying or empty pool. Finally, inspect the pool surface for existing cracks that may expand during the drain and refill cycle.
Mistake #5: Not Refilling the Pool Fast Enough
Once you drain pool water, time is your enemy. Many homeowners underestimate how important it is to refill quickly. Every hour your pool shell sits empty in Arizona heat increases the risk of surface damage and structural stress.
Therefore, have your water source ready before you begin draining. Confirm your garden hose or water delivery option is in place and ready to go. Additionally, do not plan a drain if you know you will be away or unable to monitor the refill process.
Chemistry After Refilling
After you refill the pool, your water chemistry will need immediate attention. Fresh tap water in Mesa and Gilbert often has different pH and alkalinity levels than your pool requires. Because of this, you will need to test and balance the water before anyone swims.
Furthermore, a fresh fill can introduce calcium and minerals that affect your equipment over time. A pool technician can test the water and recommend the right balance of chemicals. This step protects both your family and your pool investment.
Ready to get expert help with your pool? Talk with a pool care expert at Valley Pool Service to make sure your drain and refill goes smoothly from start to finish.
Mistake #6: Attempting a Full Drain Without Professional Help
Perhaps the biggest mistake is trying to fully drain pool water without hiring a professional. In Gilbert, Mesa, Chandler, and the surrounding East Valley, pool draining involves real structural and legal risks. A trained technician understands these risks and knows how to manage them properly.
Moreover, professionals carry the right equipment and experience to drain pool water safely and efficiently. They also know how to inspect your pool shell and equipment during the draining process. As a result, potential problems are caught early before they become expensive repairs.
On the other hand, a DIY drain gone wrong can cost far more than a professional service visit ever would. Therefore, for a full or partial drain, we strongly recommend scheduling a professional inspection and service. Your pool — and your wallet — will thank you.
Frequently Asked Questions About Pool Draining in Mesa AZ
How often should I drain pool water in Mesa?
Most pools in the East Valley need a full or partial drain every few years. However, the exact frequency depends on your water quality and usage. A pool professional can test your total dissolved solids (TDS) levels to determine when draining is necessary.
Can I drain pool water into my yard?
In most cases, draining chemically treated water into your yard or landscaping is not recommended. It can harm plants and contribute to soil erosion. Additionally, local regulations in Mesa and Gilbert may restrict this practice. Always verify local rules first.
What is the safest time of year to drain a pool in Arizona?
Late fall through early spring offers the safest window for draining. Cooler temperatures protect your pool shell and surface from heat damage. Furthermore, the groundwater table is typically lower during these months, reducing hydrostatic pressure risk.
Will draining my pool damage the plaster or pebble finish?
Yes, it can — especially if the pool sits empty for too long in direct sunlight. Arizona’s intense UV rays and heat can dry out and crack pool surfaces quickly. Therefore, minimizing the time your pool sits empty is essential to protecting your finish.
Do I need a permit to drain my pool in Mesa?
Permit requirements vary by city and situation. Mesa and other East Valley cities may have specific guidelines for large water discharges. Therefore, contact your local city utility or water department to confirm any requirements before you drain pool water.
Let Valley Pool Service Handle Your Pool Draining the Right Way
Draining a pool in Mesa or anywhere in the East Valley is not a casual weekend project. It requires careful planning, the right equipment, and knowledge of local regulations. Therefore, trusting an experienced pool professional is always the smarter choice.
At Valley Pool Service, our Gilbert-based technicians have extensive experience helping homeowners across Mesa, Chandler, Gilbert, and Queen Creek drain, inspect, and refill their pools safely. We will walk you through every step and make sure your pool is protected throughout the process.
Whether you need a full drain, a partial drain, or just an inspection before you start, our team is ready to help. Request a free quote today and let us take the guesswork out of pool draining. Contact Valley Pool now to schedule your service visit and keep your pool in top condition all year long.
