Psi 0 a little confused

Apr 12, 2018
57
Indianapolis, IN
Well shoot went out to run the pump last night and it’s like it lost prime. I put the hose in the pump basket and filled it up.

This all ran fine day before yesterday at 14psi no issues. Last thing I did was add DE to the filter, and was running fine again at 14psi.

When prinming the pump do I have to fill the main and skimmer pipes or is the pump basket well enough?

I just dont understand why. It’s about 34 degrees out does that make a diff?

note correct amt of de added and ran for 15 min after, I think the bag suggested only 5.min. After this post I primed 2 times and only was getting like 3-4 psi. I gave up.

i have a main drain and skimmer.
 
When prinming the pump do I have to fill the main and skimmer pipes or is the pump basket well enough?
The basket alone should suffice, although you may have to do that a couple times depending on the difficulty of prime and the pump "pulling" water through the pipes to the basket. The temp won't matter.

So everything was fine before this until you added DE? Let's ask you a few questions:
- Did you just recently open your closed pool? If so, did you open it or have someone do it for you?
- Besides the DE, has any other maintenance been done?
- When was the last time the grids were removed & cleaned?
- How much DE did you add?
- How/where did you add the DE (please describe)
- Does your pressure gauge move at all now? Any chance it's not working properly after winter?
- Have you tried priming from just the skimmer or main drain one at a time alternating?

Let's start there and see what we come up with by putting all our TFP heads together. :)
 
Have you tried feeling the return pressure in front of the jets to verify that you have poor flow when the gauge is reading that 3-4 psi ??
 
The basket alone should suffice, although you may have to do that a couple times depending on the difficulty of prime and the pump "pulling" water through the pipes to the basket. The temp won't matter.

So everything was fine before this until you added DE? Let's ask you a few questions:
- Did you just recently open your closed pool? If so, did you open it or have someone do it for you?
- Besides the DE, has any other maintenance been done?
- When was the last time the grids were removed & cleaned?
- How much DE did you add?
- How/where did you add the DE (please describe)
- Does your pressure gauge move at all now? Any chance it's not working properly after winter?
- Have you tried priming from just the skimmer or main drain one at a time alternating?

Let's start there and see what we come up with by putting all our TFP heads together. :)

I also posted under filters and got some good responses.

I opened my own pool recently first timer had a company scheduled, but gained enough knowledge and just did it myself. All went to plan and had 14 PSI right before and after adding DE.
Added 3.25 lbs of DE as a slurry for a 24ft per owners manual. At the time was getting 14 PSI all jets working well I let this filter for maybe 15 min, manual stated at least 5 min after DE. DE added per skimmer as a slurry, I added in parts as to let the DE filter in and coat the grates, no issues noted.

I assumed all was well.

Not sure when the grids were cleaned last, I would assume when the pool was closed professionally last fall. No other maintenance yet.

So far I have determined my prime from the get go was weak, the water does not fill the basket all the way as noted in priming videos still was getting a 14 psi at the filter and on the water valve.

I've tried priming with the main closed and skimmer closed and I only get a pressure surge at the filter of maybe 10PSI as I open the main valve, I don't get this surge as much when trying to prime with only the skimmer. IN all cases I get a PSI of 3-4 at the water valve.

When I first ran the pool I always heard the water valve working a 14 psi, but I only here that when I attempt to prime now.

So far have found a couple of loose fittings and corrected, but no improvement. No sucking of air that I can detect. I did verify that my impeller was clear and clean.

I suspect that maybe I had a partial clog and adding DE finished the job.
 
I would assume when the pool was closed professionally last fall. No other maintenance yet.
This statement always concerns me. Our concept of "professional" seems to vary from what we actually receive. I've seen that more times here at TFP than I can count. Often times techs show-up and just do the absolute minimum. If you have any doubt about the work done at closing, it may be worth inspecting/cleaning the grids before you add anymore DE. While we immediately dive into the suction plumbing for suspected prime problems, a restriction in the filter can really impact the pumps ability to pull water. My small cartridge does that as well to my pump. When the cartridge starts getting full, my pump basket water level drops quicker on low speed. So once you've completely ruled-out any issues on the suction side, it may be time to give that filter a good spring cleaning. :)
 
So I called the local pool company that serviced the pool last year.

They confirmed they in fact clean the filter when closing, but as to weather I can trust that statement is yet to be seen. I explained my issue in detail and they plan to try and fit me in Friday, but suggested I attempt to use the drain king once I get it Tuesday. She also suggested many of the things you folks have suggested and I had already attempted.

So course of action: Try the drain king on the skimmer side, and since I have time take the filter apart and do a spring cleaning just to verify it was done correctly and is fresh for when we get back to running and or not the issue. If all else fails have the pool place take over Friday.

Question since the main drain has a cover over it with small holes how does one use a drain king on it I mean will the junk come out of the holes on the drain cap? I have 2 main drain inlets on the deep end.
 
travelcat18.

Are any of your valves hard to turn? I opened my pool this weekend and had a similar situation, it turned out that one of the O-rings on my valve broke and as a result a lot of air was being pulled in, the valve was harder to turn due to the broken o-ring. I recommend that you lube the gasket on the pump lid and check for any air leaks on the valves before the pump. Hope this helps, but please let us know what the issue was once you have found it.
 
82291B06-BBDB-4DCC-B2AD-CD01F4CD6182.jpgSo I believe I confirmed no clog in the skimmer. Put the hose in at the pump and water poured from skimmer (doing a partial drain on the pool CYA) anyway I did the same for the main drain and let it run and nothing came back at me so that suggests no clog will confirm tomorrow with the drain king. I tore down the filter for a good cleaning so I could rule that out as a cause and found this fiberglass on the pump housing bottom. Not sure it is all the way through or not. If you can tell it’s lifted with a line of dirt under possible crack.
 

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