Thinking about draining your inground pool? Maybe you're facing a stubborn algae bloom you can't conquer, or perhaps you need to tackle some much-needed repairs. Whatever the reason, emptying an inground pool isn't as simple as pulling a plug; it requires careful planning and execution to avoid costly damage to your pool structure and surrounding property. Improper draining can lead to hydrostatic pressure buildup, causing the pool to crack, shift, or even pop out of the ground – a nightmare scenario for any pool owner!
Knowing the proper procedure for safely draining your inground pool is essential for both preventative maintenance and emergency situations. It allows you to effectively clean and address significant issues, prolonging the life of your pool and ensuring years of enjoyment. Neglecting the precautions can turn a simple task into an expensive and stressful ordeal, highlighting the importance of understanding the steps involved and the potential risks. So, let's dive in and learn how to get the job done right.
What essential steps and precautions do I need to consider before, during, and after draining my inground pool?
How far down can I safely drain my inground pool?
Generally, it's safest to avoid completely draining an inground pool. If you must drain it, never drain it completely empty. It's usually safe to drain it no further than halfway, or below the skimmer but above the main drain. The safest approach is to consult a pool professional for guidance specific to your pool and local conditions before draining any water.
Draining an inground pool completely can cause significant structural damage. The hydrostatic pressure from the surrounding groundwater can exert immense force on the empty pool shell, potentially causing it to crack, buckle, or even pop out of the ground. This risk is particularly high if the water table is high or the soil is saturated due to recent rain. Also, the weight of the water helps to hold the pool in place and stabilize the surrounding soil, and removing it can cause the pool walls to shift or collapse. The type of pool construction is important in deciding how much water to drain. Vinyl liner pools are generally more susceptible to damage when drained, as the liner can shrink, wrinkle, or detach from the walls. Fiberglass pools are also vulnerable to hydrostatic pressure. Concrete pools are often more robust, but they can still crack if drained improperly. Even draining partially, it's recommended to monitor the pool shell for any signs of bulging or cracking. A hydrostatic relief valve, if installed, can help to alleviate some of the pressure, but it's not a guarantee against damage. Ultimately, the decision of how much to drain your pool should be made with caution. If you absolutely need to drain the pool completely (for example, for major repairs), it's crucial to consult with a qualified pool professional. They can assess the water table, soil conditions, and pool construction to determine the safest course of action and may recommend bracing the pool walls or pumping out groundwater to equalize the pressure.What's the best type of pump for draining an inground pool?
The best type of pump for draining an inground pool is a submersible pump, specifically a submersible utility pump or a trash pump. These pumps are designed to be placed directly in the water and can handle the solids and debris that are often present in pool water, making them more efficient and less likely to clog compared to other types of pumps.
Submersible pumps are preferred because they are self-priming, meaning they don't require manual priming to start pumping water. This is a significant advantage when draining a pool, as it simplifies the process and minimizes the risk of the pump running dry and overheating. Furthermore, utility pumps and trash pumps are built to withstand the harsh conditions often encountered during pool draining, including exposure to chemicals and the presence of sediment. Utility pumps will generally have a smaller intake, so you'll need to monitor for clogs. Trash pumps are specifically designed to handle larger debris without clogging. When selecting a submersible pump, consider the flow rate (gallons per hour or GPH) and the discharge head (the vertical distance the pump can lift the water). A higher flow rate will drain the pool faster, but also check your local regulations about where pool water can be discharged, and the flow rate requirements. The discharge head needs to be sufficient to pump the water to your desired drainage location. Also, consider the power source – electric pumps are common, but gas-powered pumps might be necessary if you don't have easy access to an electrical outlet near the pool. Ensure that the pump you choose is compatible with the type of debris and water quality typically found in your pool.How do I prevent my inground pool from popping when I drain it?
The primary way to prevent an inground pool from "popping" or being damaged when drained is to relieve hydrostatic pressure. This involves ensuring that groundwater surrounding the pool shell isn't exerting excessive upward force. You accomplish this by accessing and opening the hydrostatic relief valve typically located at the bottom of the deep end before and during the draining process.
Understanding why a pool can "pop" is crucial. When a pool is full, the weight of the water inside counteracts the pressure from the groundwater outside. However, when you drain the pool, this internal weight is removed, and if the groundwater pressure is significant, it can literally push the pool shell upwards, causing cracks, bulges, or even complete structural failure. Factors increasing the risk include a high water table, poor soil drainage, and recent heavy rainfall. The hydrostatic relief valve is designed to automatically relieve this pressure. It's essentially a one-way valve that allows groundwater to enter the pool if the pressure outside exceeds the pressure inside. However, it can sometimes become clogged with debris or minerals, rendering it ineffective. Before draining, locate the valve (usually covered by a small grate), carefully remove the cover, and ensure the valve is clear and functioning. Some pool owners proactively remove the valve completely before draining to guarantee pressure equalization. If you’re unsure of the valve's location or how to access it, consult your pool's documentation or a qualified pool professional. Consider having a professional inspect the pool for any pre-existing conditions that could be worsened by draining. If you suspect a particularly high water table, consider consulting with a pool professional who can assess the situation and recommend additional precautions, such as dewatering the surrounding area with pumps. Never drain your pool completely during periods of heavy rainfall or when the water table is known to be high. It is best to drain during the driest time of the year.What do I do with the chlorine-filled water when draining?
Before draining your inground pool, it's crucial to neutralize the chlorine to avoid harming the environment. Let the water sit, untreated, for several days (typically 5-7) while frequently testing the chlorine level with a reliable test kit. The target is to achieve a chlorine level of 0 ppm (parts per million) before you begin draining. You can accelerate the process by using a chlorine neutralizer like sodium thiosulfate if needed.
Once the chlorine level is confirmed to be 0 ppm, you can typically drain the water onto your property, ensuring it doesn't flow directly into storm drains or nearby waterways. The specific regulations surrounding pool drainage vary significantly by location, so always consult your local municipality or homeowner's association for their specific guidelines and restrictions. They may require specific permits, testing, or disposal methods to prevent environmental damage. Violating these regulations can result in fines. Factors like the size of your property, the surrounding vegetation, and the proximity to sensitive areas (like wetlands or streams) will all influence the permitted methods for drainage. If you're uncertain or concerned about the volume of water, consider hiring a professional pool service company. They have the expertise and equipment to drain the pool safely and in compliance with all local regulations. They might pump the water into a sanitary sewer system, if permitted, or haul it away for proper disposal at an approved facility.How long does it typically take to completely drain an inground pool?
Draining an inground pool usually takes between 8 and 24 hours, but this can vary significantly depending on the pool's size, the pump's capacity, and the diameter of the discharge hose used.
Several factors influence the draining time. The larger the pool, the more water needs to be removed, which naturally extends the process. A more powerful pump, rated for a higher gallons-per-hour (GPH) flow rate, will drain the pool faster than a smaller, less powerful one. Similarly, a wider diameter discharge hose allows for a greater volume of water to be expelled at once, thus reducing the overall draining time. Consider investing in a submersible pump designed for draining pools for the fastest results. In addition to the above, it's crucial to monitor the draining process, particularly as the water level gets low. Some inground pools can experience hydrostatic pressure issues, where the pressure of the groundwater outside the pool exceeds the pressure inside, potentially causing the pool to float or crack. In areas with high water tables, it's best to consult with a pool professional before completely draining your pool to mitigate any risks.Should I hire a professional to drain my inground pool?
Whether you should hire a professional to drain your inground pool depends on several factors, primarily your experience, the pool's construction, and the reason for draining it. While it's possible to do it yourself, improper draining can lead to serious structural damage to your pool, so if you're unsure or dealing with a pool in poor condition, professional help is highly recommended.
Draining an inground pool is not as simple as pulling a plug. The hydrostatic pressure from the surrounding groundwater can cause the pool shell to "float" or crack if the water is removed too quickly, especially in areas with high water tables or clay soil. A professional will assess your specific situation, including soil conditions and the pool's construction, and employ methods to mitigate these risks. They might use a hydrostatic relief valve (if your pool has one) or employ pumps to control the rate of draining and monitor the groundwater levels. Furthermore, they have the proper equipment, such as submersible pumps capable of handling large volumes of water, and know how to dispose of the drained water responsibly, adhering to local regulations. If you're simply draining a small amount of water for minor repairs or winterizing, and you're confident in your ability to monitor the water table and prevent any issues, you might be able to handle it yourself. However, if you're draining the entire pool for significant repairs, liner replacement, or due to severe algae or contamination, the risks are much higher, and a professional is generally the safer and ultimately more cost-effective choice. A cracked or floating pool requires extensive and expensive repairs that far outweigh the cost of professional draining.What permits are required before draining my inground pool?
The permits required for draining an inground pool vary significantly depending on your location. Generally, you need to check with your local city or county government, specifically the building department, environmental services department, or water management district, to determine if a permit is needed. They will assess potential impacts on the local sewer system, storm drains, and the environment.
Draining a large volume of water from a pool can overwhelm the sanitary sewer system or contaminate storm drains if the water contains high levels of chemicals like chlorine, salt, or cyanuric acid. Some municipalities require a permit to ensure that the pool water is properly dechlorinated and pH-balanced before discharge. They might also specify approved methods for disposal, such as slowly releasing the water into the sanitary sewer system (if allowed) or using a sump pump to distribute it gradually across your lawn, avoiding runoff. Failure to obtain the necessary permits can result in fines and penalties. Before you even consider draining your pool, contact your local authorities. They can provide specific guidelines and application procedures. Furthermore, it's prudent to research local ordinances regarding water conservation, as some areas might restrict pool draining altogether, especially during drought conditions.And that's all there is to it! Emptying your inground pool might seem daunting, but with a little patience and the right steps, you can get the job done safely and effectively. Thanks for taking the time to read this guide, and we hope you found it helpful. Be sure to check back soon for more helpful tips and tricks to keep your pool sparkling all season long!