Question about Hayward Sand Filter System & Tank 21" 1 1/2 Hp

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Pump Size How to Calculate

How do I calculate the pump size needed for me?

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Pump Size Calculation: Gauging the correct size for your water garden pump will ensure your pond receives the proper water circulation. Unless the pump you buy is already configured with a built-in fountain head, you'll need to calculate how much a pump can handle before you choose a certain size or model. A good rule of thumb is that pumps should be able to pump out about half the pond volume every hour. So a pump that moves 500 gallons per hour would be appropriate for a 1,000 gallon pond. In order to determine the size pump you'll need, you must calculate several key measurements.

Posted on Aug 27, 2008

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There are a number of online sites that have free calculators for pond keepers. Just google garden pond calculator. You will have to start with a pond volume calculator, once you know the approximate amount of water your pond holds, then use the other calculators to figure TDH (total dynamic head), friction loss, etc.
Hope this helps
Raincree

Posted on Jan 03, 2009

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Head loss is 70m, and discharge is 6.92
l/s .how calculate pump horse power

Posted on May 03, 2010

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It seems as if youve already got the best solutions

Posted on Oct 02, 2011

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What size circulating pump will I need to buy for my closed loop infloor heating system for my garage floor that is 30ft by 40ft? The pex tubing is in the S shape,1ft apart and is a 3 zone configuration if that helps.

Truewoman

Posted on Jan 09, 2010

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john224
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SOURCE: how do i calculate pump size how do select pump

Thank you for posting your question here on Fixya.com.


The short answer is based on amount of fluid needed at the delivery point(s) and at what pressure that fluid needs to be at those points. If it is a pool pump the answer changes slightly since a pool is a closed loop system and you are more concerned with the turnover rate of the water in order to keep it clean. Is there a specific application you need help with? If so please add a comment to this post and I'll see what I can do to assist.


If this answer does not fix your problem, please comment with additional details prior to rating the answer. You may also contact me thru our website at www.arrowmotor.net. Positive feedback is appreciated once your problem is solved!

Posted on Mar 11, 2011

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you will need a pump that has a greater ability to pump water thru two or more nozzles , this pump spec is known as (GPM) this number needs to be greater than all the nozzles gpm , second pump spec goes hand in hand with the first spec and that's LIFT the pumps lift (head pressure) needs to be greater than the height of highest waterfall plus 2 inches , id suggest using two valves after the pipe Tee from pump to restrict flow to the lower of the two outlets (water seeks its own level ) so the lower of the two or more outlets will receive all the flow , and last but not least the PIPE or tube size needs to be of large enough size to handle all the flow needs of your pump ,simple std pipe size flow rate charts are avail on internet easy enough so I wont go into that

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How do i calculate pump size how do select pump


Thank you for posting your question here on Fixya.com.


The short answer is based on amount of fluid needed at the delivery point(s) and at what pressure that fluid needs to be at those points. If it is a pool pump the answer changes slightly since a pool is a closed loop system and you are more concerned with the turnover rate of the water in order to keep it clean. Is there a specific application you need help with? If so please add a comment to this post and I'll see what I can do to assist.


If this answer does not fix your problem, please comment with additional details prior to rating the answer. You may also contact me thru our website at www.arrowmotor.net. Positive feedback is appreciated once your problem is solved!

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Just installed,having problems after priming,i can' t enough water coming up.is there adustments on pump that i need to know?


There are no adjustments for pump. Amount of water it will pump is set by pump design. The way I read your posting is the pump picks up prime but not enough delivery. Check your connections (pipes) make sure your not sucking air on any of them. check for obstructions in discharge. Are you sure the water source will handle a pump this size? Its possible also the foot valve is stuck.

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Hi,

If you're talking about the O-rings that are on the pump unions you will need to measure your pump.

Measure the diameter of the thread on the pump...
1.5": Pump thread measures approx. 2-3/8" O.D.
2.0": Pump thread measures approx. 3" O.D.
2.5": Pump (intake) thread measures approx. 3-5/8" O.D.

Any reputable hot tub dealer should be able to supply you with O-rings if you tell them what size unions your pump has. The most common is 2".

Kind Regards,
Ian.
http://hottub.synthasite.com

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The pump is rated to produce (x) amount of GPM. (gallons per minute) If your wondering about the pressure the pump will produce, It depends on a lot of variables, like at what point in the system output you measure and how far from the pump (friction loss). The pump name plate should show some data, start there. Go online and get the data for that specific pump. Check with Mfg of pump.

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