Owning a pool comes with regular upkeep, but sometimes homeowners consider draining it entirely for cleaning, repairs, or renovations. While draining might seem like a straightforward task, it’s important to understand that doing it incorrectly can lead to costly damage. Whether you have a concrete or vinyl-lined pool, removing all the water is not without risks.
Why Draining a Pool Can Be Risky
- Structural Damage from Hydrostatic Pressure
Pools are designed to hold water, which counterbalances the pressure from the surrounding ground. When the pool is empty, underground water or shifting soil can push against the shell, causing cracks, lifting, or even popping the pool out of the ground, a phenomenon known as “pool pop.” - Vinyl Liner Shrinkage or Wrinkling
If you have a vinyl-lined pool, draining it completely can cause the liner to shrink, loosen, or wrinkle. Once it loses its tight fit, it can be difficult or impossible to reinstall without replacing it, which can be a costly repair. - Surface Drying and Cracking
Concrete and plaster pools rely on constant water coverage to maintain their surface integrity. Without water, plaster can dry out, crack, or flake, especially under direct sunlight. This not only affects the pool’s appearance but can also lead to further structural deterioration.
When Draining Is Necessary
While risky, there are situations where draining is unavoidable:
- Major Repairs: Structural fixes, resurfacing, or replacing certain components often require an empty pool.
- Severe Water Imbalance: If your water chemistry is far beyond correction (extreme calcium hardness, total dissolved solids, or contamination), a full drain and refill might be necessary.
- Pool Remodeling: Adding features, changing depth, or installing new finishes often involves draining.
How to Drain a Pool Safely
If draining is essential, following safe practices can help protect your investment:
- Check Groundwater Levels
Before draining, verify that the surrounding water table is low. If the water table is high, the risk of the pool shell lifting is significantly greater. - Choose Mild Weather Conditions
Extreme heat can dry out pool surfaces quickly, while heavy rains can increase groundwater pressure. Aim for mild, stable weather to reduce risks. - Use a Professional Service
Experienced pool professionals know how to safely manage drainage, assess risks, and use proper equipment. They can also handle hydrostatic relief valves to prevent structural stress. - Partial Draining as an Alternative
In some cases, a partial drain can solve water quality issues without exposing the entire structure to damage risks. This method is especially useful for minor chemical corrections.
Maintenance Tips to Avoid Frequent Draining
- Regular Water Testing: Keep pH, alkalinity, and sanitizer levels in check.
- Proper Filtration and Circulation: Clean and maintain filters to prevent water quality from deteriorating.
- Routine Cleaning: Skim debris, vacuum the floor, and brush pool walls to prevent buildup.
- Prevent Chemical Overuse: Excessive shock treatments or stabilizers can lead to imbalances that may tempt you to drain unnecessarily.
Need Expert Advice?
At Royal Pool Builders LA, we help homeowners make informed decisions about pool maintenance, renovations, and repairs, including whether draining your pool is truly necessary. Our team considers your pool type, local conditions, and long-term durability before recommending any course of action.
Call (806) 542-3470 to schedule a consultation or get a free estimate. Let’s protect your investment and keep your pool in top shape for years to come.