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PostPosted: Feb 18th, '18, 03:58 
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I have bought a resun king 5. It has a flowrate of 6000l/hour. it is fixed rate. What plumbing tricks can i use to lower the flow rate ?


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PostPosted: Feb 18th, '18, 09:04 
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What most people do is put a T and a ball valve into the line going from the pump. The redirected flow usually goes elsewhere to increase aeration. The ball valve lets you adjust how much goes.


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PostPosted: Feb 18th, '18, 14:14 
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What Scotty says is one way, but you dont actually need a T, just put an inline tap and slightly close it to restrict the flow a bit. The effect on the pump is no different to pumping to a higher head.

BTW, pumps don't actually have a fixed rate as such, the specified flow rate is usually the maximum flow at zero head. There should be a graph in the specifications showing flow rate at different head heights.

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PostPosted: Feb 18th, '18, 16:32 
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other option is to spread the flow around the beds with a perimeter pipe.
That will spread the water but the net return flow will be same.
or better still add a second grow bed ;-)

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PostPosted: Feb 20th, '18, 17:10 
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Thnkyou for your advice. The pump has to lift 2.75m. There wasnt a graph included, but i looked up a similar pump
(eco 1584), and the flow rate should reduce to about 1500l/h. The fish tank i intend to use I will fill to 2000l.
I'm going with the T idea of scotty, and redirecting the water to the sump, aereated.
Thankyou once again


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