High pool pump pressure

nityntiy

Active member
May 17, 2016
40
Dallas, TX
My pump pressure is running high lately even after hosing down the cartridge 3-4 times. It starts at 8 psi and in 20 minutes or so, goes up to 16 psi. I had a lot of algae in it last month as I was out of town for several weeks. I ended up shocking the pool and washing the cartridge, but still, the pressure is running higher than normal. There is another valve next to the pump that leaks water. Not sure if that's the culprit. What are my options?

The blue component (whatever that is) leaks water through the top.
 

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nityntiy

Active member
May 17, 2016
40
Dallas, TX
Yes, that was couple weeks ago. Now the water is clear but cloudy and pressure is real high. The filter looks clean compared to the first 2-3 days, it was real dirty and greenish with all the algae in it. But now it looks normal. I checked the skimmer and it looks clean of debris as well.
 

duraleigh

Admin
Mod Squad
TFP Expert
Platinum Supporter
LifeTime Supporter
In The Industry
Apr 1, 2007
32,916
Sebring, Florida
That leak on the pressure side does not contribute to high pressure. What does contribute is resistance (dead algae and debris) in your filter.

As Marty says above, I think you will find you still have algae and that your problem is with your chemistry and not with your filter.
 

nityntiy

Active member
May 17, 2016
40
Dallas, TX
Ok, I refilled the pool today and added some 10% liquid chlorine couple hours ago. Now I have only 2ppm free chlorine. Guess needs to remove further algae.
 

proavia

LifeTime Supporter
TFP Guide
Feb 6, 2015
1,677
Chandler AZ
Post a full set of test results from one of our recommended test kits. Also, fill out your signature with details about your pool and equipment (including test kit).

FC
CC
pH
TA
CH
CYA
Water temp

After we have this info, we can better assist you.
 

nityntiy

Active member
May 17, 2016
40
Dallas, TX
I read online algae slime can create a coating on the filter which is hard to remove through shocking. I think that's what's going on in my case. The filter doesn't look dirty but the pressure is real high. :(
 

Lilypad

Bronze Supporter
Nov 12, 2016
207
Plano, Texas
The blue component (whatever that is) leaks water through the top.
This is a Nature 2 cartridge. It will leak until you replace the cartridge, which isn't a good thing.
If you search the Forum, you'll find that it will: add metals to your pool that you don't need, not
do any of the things promised to keep your water "cleaner with less chlorine" and cost you a
ridiculous amount to replace the cartridge 2x a year. I think it's why the convenient "leak feature"
was added!

I had one for many years until I found TFP. I had the cartridge completely removed and had a
PVC piece added to patch the hole. I don’t miss it AT ALL. My pool looks great and I get to
save over $150+ annually.
 

jimmythegreek

TFP Expert
Bronze Supporter
In The Industry
Aug 10, 2017
1,699
Morris Cnty NJ
You have algae still and the filter is gummed in the tight section of inner sleeve. TSP as recommended above is the best bet. I use a rubbermaid garbage can to soak them overnight
 

Pool Whisperer 85

In The Industry
Dec 3, 2019
3
California
Use good water pressure, and a good high pressure nozzle. They sell brass ones at home depot for about 5 dollars. It should look like a mustard cap, shaped like a cone. This is the best nozzle to use. It sounds like you've still got algae between the pleats of your cartridges. I have noticed a certain brand of cartridges do tend to plug up rapidly after only 1 year of use, I don't know if they have fixed the issue.
 
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nityntiy

Active member
May 17, 2016
40
Dallas, TX
After shocking, I ended up vacuuming the white dust(large quantity) from the pool floor and it was fed back through the skimmer line. Is that how it's supposed to be done? It's my first time doing it. Just making sure I don't need to drain/clean the water inside the catridge dome since the pressure remains high even after hosing down the filter.
 

nityntiy

Active member
May 17, 2016
40
Dallas, TX
I had severe algae problem and ended up shocking the pool to get rid of it. But now the filter pressure is high shortly after running the pump. Tried cleaning the filters mulitple times, but pressure stays high in 20 minutes.
 

mknauss

Mod Squad
TFP Expert
Bronze Supporter
May 3, 2014
23,632
Laughlin, NV
To clear the pool of algae, you should follow the SLAM Process. It is not a one time application of chlorine.

What test kit do you use? Can you fill out your signature?

Your filter is clogging with algae.
 

nityntiy

Active member
May 17, 2016
40
Dallas, TX
To clear the pool of algae, you should follow the SLAM Process. It is not a one time application of chlorine.

What test kit do you use? Can you fill out your signature?

Your filter is clogging with algae.
I did slamming and ended up getting the white dust at the bottom. That's when I did the vacuum to remove the dust. Then I cleaned the filters multiple times, still the pressure goes up shortly after starting the pump (around 30-40 minutes). Never had this issue before, normally cleaning the filter 2 times max brings the pressure back to normal.
 

nityntiy

Active member
May 17, 2016
40
Dallas, TX
Read Cartridge Filter Use and Care - Further Reading

You need to clean a cartridge with TSP and then soak in diluted acid.
Thinking about picking up some TSP cleaner. But I read online that it might cause phosphate bloom in your pools which is rich source of algae food. Is it still safe to clean the filter with it? How do you ensure the filter is fully clean from the TSP after hosing it down?