I need to do a complete drain due to high CYA and calcium hardness. I have a Zoller 1/3 hp submersible pump (40gpm) and a 5/8” garden hose. Hose run is a lengthy 135’. Lift is about 5 1/2 feet. Pool is 10K gallons, but I’m just looking for a flow rate….I can do the math. Has anyone done this? Just curious how long this is going to take. I’d run a test and measure the flow, but that’s as much work as starting the drain and I’m not quite ready to start it yet. Just looking for a rough idea. I was thinking I’d be lucky to get 6 -7 GPM, but IDK.
Submersible Pump & Garden Hose Drain
- Thread starter JM7
- Start date
Use a bigger hose, or multiple hoses. I happened to have irrigation pipe on hand. But if not, flat backwash hose is pretty cheap.
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Or buy the 1.6 HP pump for $83 on Amazon and a large hose. (As of this second there is a $10 coupon making it $73)
Submersible pump hack.
Hey all !! I’ve been doing this for years but finally got good pics to show the difference. I have a standard 1/3 HP submersible pump withshown here Flow from 100ft 3/4 inch hose. Here comes the fun part : In the sprinkler section of the home centers / hardware store they have 3/4...
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Or buy the 1.6 HP pump for $83 on Amazon and a large hose. (As of this second there is a $10 coupon making it $73)
- Jun 24, 2021
- 15,759
- Pool Size
- 29000
- Surface
- Vinyl
- Chlorine
- Salt Water Generator
- SWG Type
- CircuPool RJ-60 Plus
The Zoller pump has a 1.5" output.
You can build a pvc "stack" with a 1.5" Male threaded to SLP connector (thread goes into the pump). Glue a length of 1.5" PVC to get it to the height required, then a 90, then a short piece, the an SLP to threaded FEMALE connector. Finally put this adapter into the female threads:
You can then connect a 1.5" backwash hose to the adapter with a hose clamp...you will get good production.
I would put the sump in a bucket to protect the pool surface.
I might also recommend you follow the "no drain water exchange" here:
www.troublefreepool.com
End result will look like this:
You can build a pvc "stack" with a 1.5" Male threaded to SLP connector (thread goes into the pump). Glue a length of 1.5" PVC to get it to the height required, then a 90, then a short piece, the an SLP to threaded FEMALE connector. Finally put this adapter into the female threads:
You can then connect a 1.5" backwash hose to the adapter with a hose clamp...you will get good production.
I would put the sump in a bucket to protect the pool surface.
I might also recommend you follow the "no drain water exchange" here:
Draining - Further Reading
www.troublefreepool.com
End result will look like this:
- Jun 24, 2021
- 15,759
- Pool Size
- 29000
- Surface
- Vinyl
- Chlorine
- Salt Water Generator
- SWG Type
- CircuPool RJ-60 Plus
I tried that. The backwash hose, as it goes over the edge of the pool, creases/collapses and reduces flow. That's what led me to build it.
- May 3, 2014
- 62,663
- Pool Size
- 6000
- Surface
- Fiberglass
- Chlorine
- Salt Water Generator
- SWG Type
- Pentair Intellichlor IC-40
With the garden hose, you will get at most 5 gpm. Likely a bit less with 135' run.
I get about 3.4 GPM.
Hazen-Williams Water Flow Formula: Head Loss, Data, Charts & Calculator
Friction head loss (<i>ft<sub>H2O</sub> per 100 ft pipe</i>) in water pipes can be estimated with the empirical Hazen-Williams equation.
www.engineeringtoolbox.com
y= 5.5 + 1.168X^2, y from 0 to 20 - Wolfram|Alpha
Wolfram|Alpha brings expert-level knowledge and capabilities to the broadest possible range of people—spanning all professions and education levels.
www.wolframalpha.com
Last edited:
1.5" pipe will give you about 32 GPM average.
9,720/32 = 304 minutes = 5.06 hours.
www.wolframalpha.com
9,720/32 = 304 minutes = 5.06 hours.
y=2.75 + 0.0075X^2, y from 0 to 20 - Wolfram|Alpha
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www.wolframalpha.com
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