starting up for season - low pressure

[td3201]

Hello all,

First time opening the pool on my own. Thought I got it all nailed down but the pressure isn't enough as it's tripping the pressure switch on the heater. Here's what happens when I get start it all up.

1. Charge the return lines
2. Open filter release valve on Sta-Rite PLM150
3. Start system up
4. Everything looks normal
5. Close release valve on filter
6. Pressure on filter reads 35 PSI and stays there
7. Notice that heater starts up fine
8. Wait 1-3 mins
9. Heater reads pressure switch open

Pool and skimmer basket are free of debris. The filter isn't that old, looks in good condition, and was cleaned. I suspect the supply lines or the heater itself. Not sure where to look. Thanks for any ideas!

 

[Texas Splash]

Seems like a fairly high PSI reading. Have you run a full set of water tests yet? That's where I would start.

 

[td3201]

Thank you for replying. I have on my own. All within normal range. I was going to run it into Leslie's quick to verify. If pressure at filter is too high, why would pressure switch on heater be grumpy?

 

[mknauss]

All within normal range.

Provide the data if you would. Along with your test kit model, etc. Not a pool store test.

 

[mknauss]

If pressure at filter is too high, why would pressure switch on heater be grumpy?

That is before the filter media. If the filter media is plugged, and flow is restricted, the heater will not run.

 

[td3201]

Oh boy. You want data from a test kit. I'm using test strips. What's the working theory here? You guys feel my levels are off and causing flow issues?

 

[mknauss]

The likely case is you have algae that is plugging the filter.

You need a test kit. See Pool Test Kits - Further Reading

 

[Texas Splash]

You guys feel my levels are off and causing flow issues?

Very common at opening. Even if you are lucky enough to not open to a green swamp, organics (transparent) can overwhelm the filter. As Marty pointed out, a through set of "reliable" test numbers from a TF-100 or Taylor K-2006C will help to confirm. A good test kit pays for itself in time, effort, and knowing exactly what chemicals may or may not be required. You won't get that kind of accurate advice from the local pool store.

 

[td3201]

Sorry for not close the loop here. Simple solution. I had to replace my filter. As soon as I did that, filter pressure was reduced by 1/2. Thanks all!