can I reduce eyeball size without adverse effect on pump?

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jeff1331

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May 8, 2016
14
Frisco, TX
I have put together a couple of evaporative chillers. We live in Texas and when it goes over 95, the pool will get too hot and may not cool down over nite. Essentially, you get run away heat. So, I made these homemade chillers out of PVC and they work OK. Well, I want to get more pressure and distance out of them so I am considering changing out the eyeballs in the remaining inlets and drop them from 3/4" (what they are now) to 3/8". Is that going to potentially jump my PSI too high on the filter or anything?

PS: I have also reduced the size and number of holes in my homemade chillers but didn't get much out of it. Would like to get more pressure on them. That's why I'm thinking to reduce the size of the holes on my inlet eyeballs. Just wondering if this could affect my pump.
 
Jeff,

You can use the size of the eyeballs to adjust the filter pressure... The larger the hole, the lower the pressure. By making the hole smaller, it will increase the pressure, but should not hurt anything, as long as you don't go crazy.. Just like putting your finger over the end of a garden hose..

Thanks,

Jim R.
 
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jeff1331 said:
I have put together a couple of evaporative chillers. We live in Texas and when it goes over 95, the pool will get too hot and may not cool down over nite. Essentially, you get run away heat. So, I made these homemade chillers out of PVC and they work OK. Well, I want to get more pressure and distance out of them so I am considering changing out the eyeballs in the remaining inlets and drop them from 3/4" (what they are now) to 3/8". Is that going to potentially jump my PSI too high on the filter or anything?

PS: I have also reduced the size and number of holes in my homemade chillers but didn't get much out of it. Would like to get more pressure on them. That's why I'm thinking to reduce the size of the holes on my inlet eyeballs. Just wondering if this could affect my pump.
Click to expand...
How did you build the chiller(s)? Any pics you can post? Thanks!
 
When I ran my evaporative cooler, I shut off two of the three returns and installed the "sprayer" on the last return.

I could get about 25 feet elevation and it changed my psi from normally 11 to around 26. This has no detrimental effect and, in fact, actually reduces your pump's electrical consumption just a little.
 
Interesting! I have wanted to put a smaller eyeball on one of my returns for the very reason Jeff1331 stated. However it does make my PSI go up by 3-4 when I do so - which is at the point where they say to backwash the filter (25% over you are when it is first started). I always assumed that since it went up that much I shouldn't do it. Good to know.
 
duraleigh said:
When I ran my evaporative cooler, I shut off two of the three returns and installed the "sprayer" on the last return.

I could get about 25 feet elevation and it changed my psi from normally 11 to around 26. This has no detrimental effect and, in fact, actually reduces your pump's electrical consumption just a little.
Click to expand...
Awesome, took your advice and plugged up two of the other returns.
 
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