PSI issues?

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anthony.poolify

In The Industry
Mar 12, 2025
6
Riverside, California
Hello, I’m fairly new to the pool game, so figured it be best to ask here!

I have a Hayward Omnilogic panel with a cartridge system. I cleaned out the cartridges as they were real dirty and placed them back into the filter. But I noticed after running the pump on high it is at 30 psi. But when I run it at low or medium it’s at 2 PSI and 10 PSI respectively. Is this normal behavior to see when you run the pool pump at high?
 

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anthony.poolify said:
Hello, I’m fairly new to the pool game, so figured it be best to ask here!

I have a Hayward Omnilogic panel with a cartridge system. I cleaned out the cartridges as they were real dirty and placed them back into the filter. But I noticed after running the pump on high it is at 30 psi. But when I run it at low or medium it’s at 2 PSI and 10 PSI respectively. Is this normal behavior to see when you run the pool pump at high?
Click to expand...
Yes. You always need to check your filter at the same speed.
 
AP,

The filter pressure is not about how well the pump is running, it is about how much effort it takes to push the water through the filter..

The slower the pump runs, the easier it is to push water through the filter, and the lower the filter pressure.. The faster the pump runs, the more effort it takes, and the higher the pressure.

My filter pressure at 1200 rpm is about 1 or 2 lbs. on a 30 lb. gauge.. You almost can't see this on a 60 lb. gauge.

The problem is you, and not the filter or the pump... :mrgreen:

There is almost never a reason to run a VS pump at a fast speed.

Thanks,

Jim R.
 
HermanTX said:
Yes. You always need to check your filter at the same speed.
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I see it was at 30 before the cleaning, but I haven’t done the cleaning in a while. But after the cleaning it was still at 30 psi so I was concerned. But when I checked the low and medium they seemed to look fine. We run it at high for the automatic vacuum we have. Just wanted to make sure there was nothing wrong.
 
anthony.poolify said:
I see it was at 30 before the cleaning, but I haven’t done the cleaning in a while. But after the cleaning it was still at 30 psi so I was concerned. But when I checked the low and medium they seemed to look fine. We run it at high for the automatic vacuum we have. Just wanted to make sure there was nothing wrong.
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If it was 30psi at 3300rpm before and after cleaning then maybe it was not cleaned thoroughly as you should see some drop in pressure after cleaning.
For example, if you run your pump mostly at 1800rpm then set the GREEN Arrow to the current filter pressure AFTER CLEANING. Then set the RED arrow to 25% higher pressure. So Let’s say it was 10psi after cleaning then set the RED arrow at 13psi. This becomes a quick visual to check the pressure and know when to clean the filter. But always check the pressure at the SAME RPM.
 
30 PSI is high for any pump on any plumbing system. Usually it is lower than that but with more details on the setup, it is difficult to say.

Do you have an in-floor cleaning system?

Do you have VS pump? What is the RPM at 30 PSI?
 

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AP,

Thanks for the extra pics...

I agree... I do not see an IFCS either.. Heaters also add some resistance to the flow of water.

It is hard to tell, but it also appears that you do not have a booster pump, so I 'assume' that you have suction side cleaner..

Do you know if the VS pump is about 1.5 HP or 3 HP? The smaller the pump the faster it will need to run..

How fast do you run the pump to turn on the cleaner??

Have you tried to run it slower?

Thanks,

Jim R.
 
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In addition to what @Jimrahbe stated above. It does appear you have a suction side cleaner as there are 3 pipes to the left of the automated actuator in front of the pump. One would be a main drain suction, another is skimmer suction and the 3rd would be a suction side cleaner. This is the most common set up but there could be other setups such as 2 skimmer lines and 1 suction cleaner (no main drain). Please confirm or let us know what your thoughts are regarding the 3 pipes on the suction left side. The right side of the intake actuator would be suction from the spa main drain.

The direct flow from the pump to the filter then to the heater, then to the SWCG which leads to either the spa or the pool return lines, is pretty standard and does not look convoluted.

There are a bunch of pipes to the right of the heater but no detail is shown as to what that is. Is it a separate water feature?
 
I think the gauge green/red is fixed and can't be changed. The red will always be 10 psi ahead of the green which is too long to wait for the filter cleaning. That's 50% (20 to 30) and you should not wait longer the 25% so you need to know the clean pressure and figure 25% up from that. But that has nothing to do with why the system is starting at 30.
 
anthony.poolify said:
Do not have an in floor cleaning system. Here is my set up.
Click to expand...
That setup really should not have that high of a PSI even at full speed.

Has the pressure always been this high or did it start recently?

Did you inspect the check valve after the heater to see if the flapper is still operating properly?

What size is the filter?

The heater looks pretty new. How old is it? For the older ones, sometimes the internals can dislodge causing a partial blockage.

How many eyeballs are there returning water to the pool and what are their internal diameters?
 
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