Pool drain and clean service isn’t something most North Texas pool owners think about until their water chemistry is so far gone that no amount of chemicals can fix it. Maybe your cyanuric acid is through the roof. Maybe the water just looks tired and cloudy no matter what you throw at it. Whatever the reason, there comes a point where the smartest move is to dump the old water and start fresh. But here’s the catch — a pool drain and refill in DFW isn’t as simple as pulling a plug.
Do it wrong and you could crack your shell, violate city ordinances, or end up with a pool that pops right out of the ground. Let’s walk through how to do this the right way.
When Does a North Texas Pool Need a Pool Drain and Refill?
Cyanuric Acid Too High — The #1 Reason for Pool Drain and Clean in DFW
This is far and away the most common reason we drain pools in North Texas. If you’ve been using stabilized chlorine tablets for years, your cyanuric acid has been climbing the entire time. Once CYA passes 80 to 100 ppm, your chlorine basically stops working — it’s still in the water, but it can’t kill anything. The CDC’s guidelines on pool disinfection stress effective free chlorine levels, and high CYA makes that impossible. The only fix? Drain some or all of the water and dilute it with fresh. No chemical on the market removes CYA.
Total Dissolved Solids Too High
Water doesn’t stay young forever. Over five to seven years in DFW’s hard water, dissolved minerals and chemical byproducts accumulate to the point where the water just doesn’t respond to treatment the way it should. If your TDS is above 3,000 ppm and climbing, a pool drain and refill is the reset button.
Calcium Hardness Beyond Manageable Levels
DFW tap water comes in loaded with calcium to begin with. Over years of evaporation and refilling, calcium hardness concentrates higher and higher. When sequestering agents can’t keep up and you’re seeing scale on everything, a pool drain and clean is the most effective solution.
Severe Algae Contamination
Sometimes a green pool is so far gone that treating it in place would cost more in chemicals and labor than just draining, scrubbing the surfaces, and refilling. Black algae embedded deep in gunite plaster is a classic example — treatment works, but sometimes a full drain and acid wash is faster and more thorough.
Pool Resurfacing or Major Renovation
If you’re replastering, retiling, or doing any major structural work, the pool has to be drained anyway. This is a great opportunity to address any other chemistry or equipment issues while the water is out.
Contamination Events
Chemical accidents, sewage backup, or dead animals in the pool — these situations sometimes require a complete pool drain and refill for health and safety reasons, not just chemistry.
How to Properly Drain a Pool in North Texas
Never Fully Drain a Gunite Pool Without Professional Supervision
This is the part that scares people, and it should. North Texas sits on expansive clay soil that holds groundwater, especially after rain. When you remove the weight of 15,000 to 25,000 gallons of water from a gunite shell, hydrostatic pressure from that groundwater can literally push the pool up out of the ground. It’s called pool pop, and it’s a real risk in DFW clay soil. This is not a DIY project. A professional pool drain and refill service monitors conditions throughout the entire process.
Where to Discharge Pool Water in DFW
City regulations vary, but most DFW municipalities allow you to discharge pool water into the sanitary sewer through your cleanout — never into storm drains, never into the street, and never onto a neighbor’s property. Check with your specific city. The City of Plano and other North Texas cities have specific ordinances about pool water service discharge, and fines for improper disposal are no joke.
How Long Does It Take to Drain a Pool?
A typical DFW pool holding 15,000 to 25,000 gallons takes 8 to 16 hours to drain depending on your submersible pump size and plumbing. Don’t rush it — draining too fast in hot weather can cause plaster to dry out and crack.
Refilling — What to Expect
DFW tap water will come in high in calcium and alkalinity right out of the hose — that’s just North Texas water. First-fill chemistry management is critical to get the water balanced before problems start. Total refill time runs 12 to 24 hours depending on water pressure and pool size. Expect $50 to $200 on your water bill for the refill, depending on your local water rates and pool volume.
Partial Drain vs Full Drain — Which Does Your Pool Need?
Not every situation calls for a full pool drain and clean. A partial drain — removing 25 to 50 percent of the water and refilling — fixes mild CYA and TDS problems with less risk and faster turnaround. It’s cheaper and you’re back up and running the same day. A full drain is necessary for resurfacing, severe contamination, extreme chemistry that a partial won’t fix, or when the surfaces need a thorough acid wash or scrub.
Your pool water service provider should assess your specific situation and recommend the right approach — not just default to the most expensive option.
Pool Drain and Refill Cost in DFW
Here’s what a pool drain and refill realistically costs in the DFW market. A partial drain and refill service typically runs $200 to $400. A full pool drain and clean with surface scrubbing and refill costs $400 to $800. Your water bill will add $50 to $200 depending on pool size and local rates. Post-refill chemical startup — getting the fresh water balanced and swim-ready — runs another $100 to $200. Total realistic cost for the whole process: $350 to $1,200 depending on scope.
Not cheap, but significantly less expensive than replacing equipment that’s been destroyed by bad water chemistry over years of neglect.
After the Refill — Critical First Steps for Your Pool Water Service
Test All Chemistry Parameters Immediately
Don’t assume fresh water is balanced water. DFW tap water has its own chemistry profile and it needs testing right away — pH, alkalinity, calcium, CYA, and chlorine.
Balance pH and Alkalinity First
DFW fill water comes in with pH and alkalinity on the high side. Bring those down first before addressing anything else — everything downstream depends on getting those two right.
Add Stabilizer — Fresh Water Has Zero UV Protection
Brand new water has zero cyanuric acid, which means the sun will burn through your chlorine in hours. Add CYA to 30-50 ppm for chlorine pools, 60-80 ppm for salt water systems. This is one of the most important pool maintenance tips after any drain and refill.
Don’t Add Calcium Hardness Increaser
DFW fill water already has plenty of calcium. Adding more is how you end up right back where you started — scaling up equipment and tile lines within months of a fresh fill.
Run the Pump Continuously for 24-48 Hours
Keep the water moving while you’re balancing chemistry. Stagnant fresh water in Texas heat can turn on you fast, especially before chlorine levels are established.
New Plaster Pools — Follow the Curing Protocol
If your pool drain and refill was for a replaster, the startup process is completely different from an established pool. Fresh plaster needs specific chemistry management for 28 days — the National Plasterers Council has detailed startup guidelines that your pool service should follow to the letter.
People Also Ask
How often should you drain your pool in Texas?
Most DFW pools benefit from a partial or full drain every 5 to 7 years, or sooner if CYA or TDS levels get out of control. Pools using stabilized tablets may need draining more frequently.
Can I drain my pool into the street in DFW?
No. Most DFW cities require pool water to be discharged to the sanitary sewer through your cleanout, not into storm drains or streets. Check your specific city’s ordinances before draining.
How much does it cost to drain and refill a pool in North Texas?
Total cost for a professional pool drain and refill in DFW ranges from $350 to $1,200 depending on whether you need a partial or full drain, surface cleaning, and chemical startup.
Is it safe to fully drain a gunite pool?
It can be — but only with professional supervision. DFW’s clay soil creates hydrostatic pressure that can damage or pop an empty pool shell, especially after rain. Never attempt a full drain yourself.
How long does it take to fill a pool with a garden hose?
A typical 15,000 to 25,000 gallon DFW pool takes 12 to 24 hours to refill with a standard garden hose, depending on your water pressure. Using multiple hoses speeds things up.
What do I do with the water chemistry after refilling my pool?
Test immediately, balance pH and alkalinity first, add stabilizer for UV protection, skip the calcium increaser, and run the pump continuously for 24-48 hours. Or just let your pool service handle the chemical startup — it’s the safest option.
PoolBurg’s Pool Drain and Clean Service — Safe, Compliant, Professional
At PoolBurg, we handle the entire pool drain and clean process from start to finish — draining safely with hydrostatic risk management, compliant water discharge, thorough surface cleaning, controlled refilling, and complete chemical startup so your water is swim-ready. We do this across our entire North Texas service area and we’ve seen every possible scenario with DFW pools.
Pool water beyond saving? PoolBurg’s drain and refill service gives you a fresh start — get your free assessment today.
