I have a raypak above ground pool and spa heater I am newly installing, the instructions say I must have an external auxiliary bypass valve if rates exceed 70 gallons per minute. How do I measure flow rate?
Thanks in advance for any advice
I have a raypak above ground pool and spa heater I am newly installing, the instructions say I must have an external auxiliary bypass valve if rates exceed 70 gallons per minute. How do I measure flow rate?
Thanks in advance for any advice
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There isn't any easy way. What size pump do you have?
19K gal, vinyl, 1/2 HP WhisperFlo pump, 200 sqft cartridge filter, AutoPilot Digital SWG, Dolphin Dynamic cleaning robot
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Can you hook up a hose to the return fitting so you can fill a 5G bucket. You can see how long it takes to fill the bucket and do the math. I know it's a bit primitive but it will give you an idea.
18x36 Vinyl In-ground w/roman ends 27,400G, Hayward 3/4hp with 300# sand filter. Hayward heat pump heater
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Putting a standard hose on the return fitting will increase head loss significantly so the flow rate will not be very accurate.
I can estimate the flow rate for you but I need the following information:
Suction pipe diameter (e.g. 1.5", 2", 2.5")
Average length of suction pipes
Number of individual suction pipes from the water to the equipment
Number and type of suction side valves
Current Pump Make/Model
Height of pump relative to the water level
Pipe size between pump and filter (e.g. 1.5", 2", 2.5")
Filter type, size and multi-port valve size
Filter PSI reading at the desired valve settings and pump's highest speed setting
Height of pressure gauge relative to the pump center line
Heater - yes or no
Number and type of return side valves
Return pipe diameter (e.g. 1.5", 2", 2.5")
Average length of return pipes
Number of individual return pipes from the equipment to the water
Return eyeball/jet inner diameter (e.g. 1", 3/4", 1/2") or Jets (e.g. 3/8", 7/16")
Number of return eyeballs
Optional: Pump suction reading (in-hg) - not necessary but improves accuracy
Mark
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18'x36' 20k plaster, 1/2 HP 2sp pump, Aqualogic PS8 SWCG, 420 sq-ft Cartridge, Solar, 6 jet spa, 1 HP jet pump, 400k BTU NG Heater, ThePoolCleaner
Here's how I got a rough idea of my flow. I did mine to calculate how long to turn the water over so I could set my filter timer.Originally Posted by traciejo@gmail.com
I set the valves to suck from the spa and return to the pool. I stuck a ruler in there and got a depth from the seat, then timed it until it went down 6". Then I shut it down, reversed the valves, and measured how long it took to raise the water level again. I figured going both directions would give me the average since the lines are all different lengths.
My spa is round. I broke out the tape measure and got the diameter, then crunched some numbers and came up with how many gallons I moved and how long it took to do it. Answer is GPM.
In case math isn't your strong point, just post the measurements and someone can crunch the numbers for you.
16K freeform gunite with spa; Pentair 4000 DE filter; Century Whisperflow 1 HP; Pentair Minimax heater.
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Hello, this is my first post. The 1st poster in this thread, traciejo (my gf) posted while I was out shopping for some parts for the pool we are assembling, I was having her read the heater manual and see if she could help me figure out our install.
Thanks for all the detailed questions to help us with an answer. I'm going to follow up with more info.
AG 7300 gallons, 18ft Wilbar Industries “Summerfield” (but sold as a “Key West”)
Filter: Millennium 22'' Sand w/ 1.5HP 1 speed 120V
Raypak heater Model 130A (P-R130A-EN-C)
Detailed questions that dovetailed from this thread here:
many-questions-related-to-our-wilbar-18ft-ag-pool-install-t48479.html
AG 7300 gallons, 18ft Wilbar Industries “Summerfield” (but sold as a “Key West”)
Filter: Millennium 22'' Sand w/ 1.5HP 1 speed 120V
Raypak heater Model 130A (P-R130A-EN-C)