Key Takeaways – How to Siphon Water With a Garden Hose
- Submerge the entire garden hose in the pool until it fills completely with water (remove all air).
- Keep one end of the hose underwater in the pool.
- Move the other end to a location lower than the pool’s water level.
- Release the lower end and let gravity start the flow.
- Make sure the submerged end stays underwater so the siphon continues working.
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Need to drain water from your pool without a pump? You can lower the water level in your pool using a simple garden hose and gravity by creating a siphon!
This guide explains how to siphon water out of a pool with a hose, when to use this method, and how to troubleshoot common siphoning issues.
How Siphoning Works (Simple Explanation)
Siphoning uses gravity and water pressure to move water from a higher level to a lower level without a pump (in this case, a garden hose).
When a hose is completely filled with water and one end is placed lower than the water source, gravity pulls the water downward to the lower end. As that water flows out, it creates continuous movement inside the hose. Because water sticks together (cohesion) and there’s steady pressure from the pool pushing behind it, the flow continues automatically.
For a garden hose siphon to work:
- The hose must be completely filled with water (no air inside).
- The drain end must be lower than the pool water level.
- The submerged end must stay underwater.
If air enters the hose or both ends are at the same height, the siphon stops. It’s simple!
What You Need to Siphon a Pool With a Garden Hose
Here are the tools you’ll need for this simple project:
- A standard garden hose – https://amzn.to/4703fR8
- A drainage area lower than the pool water level
- Enough time for gravity to do the work
You don’t need a pump or any other special equipment to siphon water out of a pool! Just a hose, said pool, and a spot lower than where your pool currently sits (for gravity to do it’s job).
Step 1: Fill Up the Hose With Water
For this step, you can either fully submerge the hose in the pool, or put one end of the hose in the pool and then fill up your hose at your hose bib. If you decide to submerge it, place the entire hose into the pool. Push it underwater until air bubbles stop coming out.
This removes air and fills the hose completely with water. If air stays inside, the siphon won’t start.
Step 2: Keep One End of the Hose Underwater
Once the hose is filled, keep one end submerged in the pool at all times.
If air enters, you’ll need to start again. Make sure you leave enough of the hose in the pool that it doesn’t accidently get pulled out when moving the hose in the next step.
Step 3: Move the Other End of the Hose to Lower Ground
While keeping water inside the garden hose, take the other end out of the pool and place it in a location that is lower than the water level.
Examples of a lower location:
- A sloped yard
- A driveway that drains downhill
- An approved storm drain (check local rules first)
The height difference (and gravity) is what makes this water siphon work.
Step 4: Let Gravity Drain/Siphon the Pool Water
Once the outlet end of the garden hose is lower and released, water should begin siphoning out of the pool and flowing automatically.
The flow will continue until:
- The water level drops below the submerged hose end
- Air enters the hose
- Both ends are at equal height
This water siphon method works because it uses gravity and water pressure to move water from a higher level to a lower level.
Once the hose is completely filled with water and positioned correctly, gravity pulls the water downward out of the pool, which keeps water moving through the hose without a pump.
Is Your Garden Hose Siphon Not Working? Common Questions and Troubleshooting
Here are some of the most common problems people encounter when trying to siphon water out of a pool with a hose.
Issue 1: The water isn’t flowing.
This is the most common issue when siphoning water out of a pool with a hose and usually it has a simple answer – it’s likely that the drain end of the hose isn’t actually lower than the pool. This method of siphoning water only works because of gravity.
If that isn’t the issue then you can next check that that the hose is completely filled with water. If there are air gaps in the hose, the water may stop coming out.
Issue 2: The flow of water has suddenly stopped.
If water flow stops suddenly, there is probably air in the hose. All you need to do to fix this is to refill and then resubmerge the hose.
Issue 3: The water is draining too slowly out of the hose.
There’s really only one fix for this – you need a wider hose! The only other thing you could do to try and speed up the pool water siphon is just increase the height difference between the submerged part of the hose and the drain end.
Siphoning Water With a Hose is Easy!
Not all yardwork has to be hard! Learning how to siphon water with a hose may be one of the easiest things you do this summer.