If you are wondering how long to fill up pool with garden hose, the answer depends on several factors, including pool size, water pressure, and hose flow rate. Filling a swimming pool for the first time requires careful planning, as the process can take several hours or even days, depending on the volume of water needed.
On average, a standard garden hose delivers 5 to 12 gallons per minute (GPM). This means a 10,000-gallon pool could take anywhere from 14 to 33 hours to fill completely. However, larger pools, such as a 15,000-gallon or 20,000-gallon pool, will take significantly longer unless you use a faster water source.
In this guide, we will cover:
- How to calculate pool fill time using a simple formula
- A pool fill time calculator for quick estimates
- The cost of filling a pool with city water or bulk delivery
- The cheapest ways to fill a pool and save money
- Whether you can fill a pool with well water without damaging your well
By understanding these key factors, you can plan efficiently and ensure your pool is filled in the fastest and most cost-effective way possible.
Factors That Affect How Long to Fill Up Pool with Garden Hose
Filling a pool with a garden hose can take anywhere from a few hours to several days, depending on various factors. The primary elements that influence fill time include pool size, water flow rate, and the type of water source used. Understanding these factors can help you estimate the time required and choose the best method for filling your pool efficiently.
Pool Size Matters
The larger the pool, the longer it will take to fill. Below are estimates for common pool sizes:
- How many gallons in a kiddie pool? A small kiddie pool typically holds around 500 gallons, which can be filled in less than an hour with a standard garden hose.
- 16×48 pool (~5,000 gallons) vs. 22×52 pool (~10,000 gallons): A 16×48-inch above-ground pool holds roughly 5,000 gallons, while a 22×52-inch pool can hold about 10,000 gallons. Filling the larger pool takes twice as long.
- 15,000-gallon pool vs. 20,000-gallon pool: These larger pools take significantly more time, often over a full day, depending on the water flow rate.
Water Flow Rate
The speed at which your hose delivers water is a crucial factor in determining fill time. Most standard garden hoses have a flow rate of 5 to 12 gallons per minute (GPM), depending on water pressure and hose diameter.
- At 5 GPM: A 10,000-gallon pool will take about 33 hours to fill.
- At 10 GPM: The same pool would take only 16-17 hours.
- At 12 GPM: The fill time is reduced to about 14 hours.
Filling Pool with Hose vs. Other Methods
While using a garden hose is the most common method, alternative water sources can speed up the process:
- City Water: The most convenient option, but be aware of water restrictions and costs, especially in areas with high water rates.
- Well Water: Free but slower, and excessive use may deplete or damage the well if it cannot replenish quickly.
- Bulk Water Delivery: Fastest but more expensive, especially for large pools.
Can You Fill a Pool with Well Water?
Yes, you can fill a pool with well water, but there are some risks to consider:
- Limited Water Supply: Overuse can cause the well to run dry temporarily.
- Water Quality Issues: Well water may contain iron, sulfur, or other minerals that can stain the pool or require additional chemical treatments.
- Pump Wear and Tear: Prolonged use can strain your well pump, leading to costly repairs.
If using well water, consider filling the pool gradually over several days and monitoring the well’s recovery rate.
By understanding these factors, you can better plan your pool filling process and decide on the best water source for your needs.
How to Calculate Pool Fill Time
Before filling your pool, it’s important to estimate how long the process will take. The time required depends on your pool size and the flow rate of your garden hose.
How Long to Fill a Pool Calculator
Use the following formula to estimate pool fill time:
How to Calculate Pool Fill Time
Before filling your pool, it’s important to estimate how long the process will take. The time required depends on your pool size and the flow rate of your garden hose.
How Long to Fill a Pool Calculator
Use the following formula to estimate pool fill time:
Fill Time (hours) = Pool Volume (gallons) ÷ (Hose Flow Rate (GPM) × 60)
For example, if your hose flow rate is 10 gallons per minute (GPM) and your pool holds 10,000 gallons, the estimated fill time would be:
10,000 ÷ (10 × 60) = 10,000 ÷ 600 = 16.7 hours
How Long to Fill Up Pool with Garden Hose Calculator
Pool Fill Time & Cost Calculator
Below are estimated times for different pool sizes using a 10 GPM hose:
- How long does it take to fill a 5,000-gallon pool? ≈ 8-9 hours
- How long to fill up a 6,000-gallon pool with a garden hose? ≈ 10 hours
- How long does it take to fill a 20,000-gallon pool with a garden hose? ≈ 33 hours
- 500,000-gallon backyard pool? Takes weeks unless using bulk delivery or a fire hydrant.
If your hose has a lower flow rate, the fill time will increase. Using multiple hoses can reduce fill time significantly.
Cost to Fill a Pool with Water
The cost of filling your pool depends on whether you’re using city water, well water, or bulk water delivery.
How Much Does It Cost to Have 1,000 Gallons of Water Delivered?
Bulk water delivery costs $4–$10 per 1,000 gallons, depending on location. For a 10,000-gallon pool, expect to pay $40–$100.
How Much Does It Cost to Fill a Pool with Water in Florida?
In Florida, city water rates vary by region, but the average is $3–$6 per 1,000 gallons. Bulk delivery costs may be higher in rural areas.
City Water vs. Bulk Delivery: Which is More Cost-Effective?
- City Water: Generally cheaper, but filling a large pool may increase your water bill significantly.
- Bulk Delivery: Faster but often more expensive than city water. A good option for large pools or low-pressure areas.
Cheapest Way to Fill a Pool
- Use city water overnight when demand is lower.
- Check for off-peak water rates to reduce costs.
- Use multiple hoses to speed up filling time.
- If using well water, fill gradually to avoid pump strain.
- Compare bulk delivery rates if your local water prices are high.
By calculating fill time and understanding costs, you can plan efficiently and save money when filling your pool.
Pool Sizes & Estimated Fill Times
The time required to fill a pool depends on its size and the flow rate of your garden hose. The table below provides estimated fill times using a 10 GPM (gallons per minute) hose.
| Pool Size | Gallons | Time to Fill (10 GPM Hose) |
| Kiddie Pool | ~500 | ~1 hour |
| 16×48 Pool | ~5,000 | ~8-9 hours |
| 22×52 Pool | ~10,000 | ~16-17 hours |
| 15,000-Gallon Pool | 15,000 | ~25 hours |
| 20,000-Gallon Pool | 20,000 | ~33 hours |
| 500,000-Gallon Backyard Pool | 500,000 | ~34 days (at 10 GPM) |
If your hose has a higher or lower flow rate, your fill time will vary. Using multiple hoses can help reduce the total time required.
Alternative Ways to Fill a Pool: Well Water, Hydrants & Bulk Water
While a garden hose is the most common method, there are other ways to fill a pool faster or more affordably.
Well Water: Can You Fill a Pool with Well Water?
Using well water is an option, but it comes with risks:
- Cost-effective if the well has a strong supply
- May strain the well pump if filled too quickly
- Water quality issues (iron, sulfur, or sediment) may require filtration or chemical treatment
If using well water, it is best to fill the pool gradually over several days and monitor the well’s recovery rate.
Hydrant or Fire Department Water
Some areas allow residents to use fire hydrants or obtain water from the local fire department, but approval is required.
- Fills the pool in hours instead of days
- May require permits or rental fees
- Not always available in residential areas
It is important to contact the local water department or fire department to check for availability and regulations.
Bulk Water Delivery
For a fast and convenient option, a bulk water delivery service can be hired.
- Can fill a pool in a few hours
- No strain on the home’s water system
- More expensive than city water
Comparing costs between bulk water delivery and city water can help determine the most cost-effective option.
Each water source has advantages and disadvantages, so the best choice depends on cost, speed, and availability.
Additional Pool Maintenance Tips
Filling your pool is just the first step. Proper maintenance ensures clean, safe water and extends the lifespan of your pool.
How to Drain a Pool with a Hose
Draining a pool may be necessary for cleaning, repairs, or winterization. Follow these steps to drain your pool safely using a garden hose:
- Choose a drainage location – Ensure water flows into an appropriate drainage system, not your neighbor’s yard.
- Siphon Method (for small pools) – Submerge one end of a hose in the pool, then create suction by sucking on the other end until water flows.
- Pump Method (for large pools) – Attach a submersible pump to a hose and place it in the deepest part of the pool.
- Monitor the drainage process – Avoid draining the pool completely unless necessary, as it can damage the pool structure.
- Refill and rebalance chemicals – Once maintenance is complete, refill the pool and adjust the pH, chlorine, and alkalinity levels.
After Filling: Checking pH, Chlorine, and Chemical Balance
After filling your pool, water chemistry must be properly balanced for safe swimming. Use a pool test kit to check the following levels:
- pH Level: Ideal range is 7.2 – 7.6
- Chlorine Level: Should be between 1 – 3 ppm (parts per million)
- Alkalinity: Recommended range is 80 – 120 ppm
- Calcium Hardness: Should be between 200 – 400 ppm
Adjust chemicals accordingly and allow the water to circulate for at least 24 hours before swimming. Proper chemical balance is essential for safe swimming. According to the CDC’s Pool Chemical Safety Guide, maintaining the correct pH and chlorine levels helps prevent bacteria growth and waterborne illnesses.
Conclusion
Filling a pool with a garden hose takes anywhere from a few hours to several days, depending on the pool size and hose flow rate. The cost of filling a pool varies based on whether you use city water, well water, or bulk delivery services.
To plan effectively:
- Use a “How Long to Fill a Pool Calculator” for an accurate time estimate.
- Consider alternative water sources for faster or more cost-effective filling.
- Follow proper maintenance steps after filling to keep your pool water clean and balanced.
By preparing ahead of time, you can save money, conserve water, and ensure a hassle-free pool-filling process.
Filling a pool efficiently saves time, money, and resources. Whether you’re a homeowner looking for the best water source or a business offering bulk delivery and pool services, smart strategies make a difference.
At Home Revista, we provide expert insights and top partnerships to help you fill pools faster, cut costs, and optimize maintenance. Join our 47M+ community today for smarter home and business solutions!
