16 July 2024 Finishing Up my OB Pool
- Thread starter setsailsoon
- Start date
- Oct 25, 2015
- 5,814
- Pool Size
- 28000
- Surface
- Plaster
- Chlorine
- Salt Water Generator
- SWG Type
- CircuPool RJ-60 Plus
The flow looks especially strong at the infinity wall because I have four floor returns just inside that wall pointing straight up. I have a vacuum gauge and I will see if I can hook that up to the suction Bowl drain. The pump is definitely louder at full speed but also definitely not cavitating. I know what that sounds like from my plant engineer days.
If you put a vacuum gauge in the pump suction drain plug, be careful not to overstress the hole and crack the plastic.
- May 3, 2007
- 18,076
- Pool Size
- 20000
- Surface
- Plaster
- Chlorine
- Salt Water Generator
- SWG Type
- Hayward Aqua Rite (T-15)
Right but the thermostat opens less with higher flow rates through the exchanger because the temperature drops with flow rate increase in the heat exchanger. So the thermostat is more like a flow rate regulator and tries to keep the flow rate through the heat exchanger constant for constant temperature with varying flow rates through the rest of the heater.
Also, the thermostat does not open at all when the heater is off.
- May 3, 2007
- 18,076
- Pool Size
- 20000
- Surface
- Plaster
- Chlorine
- Salt Water Generator
- SWG Type
- Hayward Aqua Rite (T-15)
What is the diameter of the outlet of each return?
Is there a grate over the return?
- Oct 25, 2015
- 5,814
- Pool Size
- 28000
- Surface
- Plaster
- Chlorine
- Salt Water Generator
- SWG Type
- CircuPool RJ-60 Plus
The infinity Basin has two returns one at each end that are CMP elongated drains with 3-in each that are combined into a 4 in underground that then runs up to the Elbow at the pad where I have a four to three inch reducer bushing. Then 3 in to the pump suction Union fitting. The main Pool and Spa returns are two and a half inch..
All of the return fittings are elongated CMP fittings with a grate.
With all of this talk you have not shown us the water in motion as of yet. I think it is time to see it all in action!
- Oct 25, 2015
- 5,814
- Pool Size
- 28000
- Surface
- Plaster
- Chlorine
- Salt Water Generator
- SWG Type
- CircuPool RJ-60 Plus
Here you go, you get an early preview. First video was setting the level with forming on inside below the 12" tile. Second was video from last night. Third was video inside the pool. There's no valves in the gutter pipe yet. When I have them installed I expect to be able to increase the flow over the back edge ~ 3X. Didn't want post these to the main thread 'till I have the valves installed so I can show max flow over back edge and add a few with ruler at edge to show the measured flow height.
Chris
OH MY that is everything you were working for and it works!!! Now my next video request will be you cannon balling into the pool to show us how the it handles that kind of water action!
The entire perimeter is not taking as much flow per foot as the Infinity Edge.
The valves will only make a small difference.
The heater is the big restriction.
To get the full flow from the pump, you need to have the least restriction possible.
The valves will only make a small difference.
The heater is the big restriction.
To get the full flow from the pump, you need to have the least restriction possible.
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- May 3, 2007
- 18,076
- Pool Size
- 20000
- Surface
- Plaster
- Chlorine
- Salt Water Generator
- SWG Type
- Hayward Aqua Rite (T-15)
This sounds like the suction side of the pump. I was asking about the return side of the pump. How does the water return back into the pool?
This pipe is maybe 20 GPM.
What size is this pipe?
You can get a 5 gallon bucket and time how long it takes to fill.
20 GPM will take 15 seconds to fill a 5 gallon bucket.
30 GPM will take 10 seconds to fill 5 gallons.
You can push a PVC cap over the end of the pipe to stop the flow to see what that does.
If you tie in the filtration pump to pull from the trough suction, you can add another 70 to 100 GPM.
What size is this pipe?
You can get a 5 gallon bucket and time how long it takes to fill.
20 GPM will take 15 seconds to fill a 5 gallon bucket.
30 GPM will take 10 seconds to fill 5 gallons.
You can push a PVC cap over the end of the pipe to stop the flow to see what that does.
If you tie in the filtration pump to pull from the trough suction, you can add another 70 to 100 GPM.
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- May 3, 2007
- 18,076
- Pool Size
- 20000
- Surface
- Plaster
- Chlorine
- Salt Water Generator
- SWG Type
- Hayward Aqua Rite (T-15)
This would indicate flow rate is close to 200 GPM which does not seem possible with the heater in line. Plus it well exceeds the maximum flow rate of 120 GPM.
Could you post a picture of the pad plumbing as it stands right now?
It's hard to tell, but it does not look like 5/16".
It is very difficult to get an accurate measurement.
If you get a flowmeter and some vacuum and discharge pressure readings, then we can better assess the flow rate.
I know that 4" pipe seems big, but it might be a little bit undersized if you want to get the full flow from both pumps on the Infinity edge.
You definitely need to get the heater off of the Infinity Edge loop.
It is very difficult to get an accurate measurement.
If you get a flowmeter and some vacuum and discharge pressure readings, then we can better assess the flow rate.
I know that 4" pipe seems big, but it might be a little bit undersized if you want to get the full flow from both pumps on the Infinity edge.
You definitely need to get the heater off of the Infinity Edge loop.
How much does the water level drop in the trough from pump off to pump on?
Use that difference to calculate the volume in motion.
For example, if the trough is 32 x 2 feet, each inch is 40 gallons.
If the drop is 2.8", then that is 112 gallons extra in the pool.
If the pool is 18 x 32, each inch is 358 gallons.
1 gallon = 0.0027933" in the pool.
112 gallons = 0.31285" = 5/16" lift.
Use that difference to calculate the volume in motion.
For example, if the trough is 32 x 2 feet, each inch is 40 gallons.
If the drop is 2.8", then that is 112 gallons extra in the pool.
If the pool is 18 x 32, each inch is 358 gallons.
1 gallon = 0.0027933" in the pool.
112 gallons = 0.31285" = 5/16" lift.
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- May 23, 2015
- 25,704
- Pool Size
- 16000
- Surface
- Plaster
- Chlorine
- Salt Water Generator
- SWG Type
- Pentair Intellichlor IC-60
What is the schedule for getting that Infinity trough finished?
Pool water in contact with bare concrete is not great. The concrete is not waterproof and it will absorb pool water. That absorbed water will travel to parts of the concrete exposed to air and you will start to see efflorescence develop. The pool water will also leech alkaline calcium components out of the cement. It needs to get finished as soon as you can. I realize getting the plumbing setup is fun and there’s lots to do there, but the edge troughs and the main trough need to get finished.
Pool water in contact with bare concrete is not great. The concrete is not waterproof and it will absorb pool water. That absorbed water will travel to parts of the concrete exposed to air and you will start to see efflorescence develop. The pool water will also leech alkaline calcium components out of the cement. It needs to get finished as soon as you can. I realize getting the plumbing setup is fun and there’s lots to do there, but the edge troughs and the main trough need to get finished.
If the pool is 32 x 18 and the trough is 32 x 2, then the drop in the trough will be 9X the lift, which is a lot easier to measure.
2.8" = 45/16".
(45/16")/9 = 5/16".
Check the drop in the trough and then cap the pipe to see how much more the drop and lift are.
Try this at different speeds to get an idea of the lift at different speeds.
2.8" = 45/16".
(45/16")/9 = 5/16".
Check the drop in the trough and then cap the pipe to see how much more the drop and lift are.
Try this at different speeds to get an idea of the lift at different speeds.
- Oct 25, 2015
- 5,814
- Pool Size
- 28000
- Surface
- Plaster
- Chlorine
- Salt Water Generator
- SWG Type
- CircuPool RJ-60 Plus
Yes that's right sorry. The returns go to the four floor returns in front of the wall or to return to the pool wall plus one to the spa or three small returns to the bubblers on the sun deck.
- Oct 25, 2015
- 5,814
- Pool Size
- 28000
- Surface
- Plaster
- Chlorine
- Salt Water Generator
- SWG Type
- CircuPool RJ-60 Plus
I didn't actually measure this yet but it looks to be about 2 in. That probably includes overnight evaporation less than half an inch.
- Oct 25, 2015
- 5,814
- Pool Size
- 28000
- Surface
- Plaster
- Chlorine
- Salt Water Generator
- SWG Type
- CircuPool RJ-60 Plus
It's kind of hard to tell but the inside of the infinity Basin has three coats of waterproofing on it. The top Edge and wall Edge are bare concrete and you can see a little difference in color. I checked the inside of the basin pretty carefully first couple of days that we had water to verify we were not leaking any out. There's just a tiny change in the level that I expect is evaporation.