Huskies said:

What would make a presto 23qt cap out at 12.5 psi?

Only thing I can see is maybe the weight could be tightened up, I can see some gaps.

Still, super weird. I'll run it for 2:30 to 3 hours instead and hopefully that'll be fine

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ThurmanMurman said:

tryptkaloids said:

I find old clean semp jars to be difficult to distinguish from something id never eat.

I guess I need more experience with the species

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I dont think I want to eat it without boiling, anyway. There may still be risks, but it's better than eating it raw. Some of the stuff I've seen - idk how you'd ever know for sure. Like ya said, that's above my abilities. 🤷‍♂️

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tryptkaloids said:

ThurmanMurman said:

tryptkaloids said:

I find old clean semp jars to be difficult to distinguish from something id never eat.

I guess I need more experience with the species

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I dont think I want to eat it without boiling, anyway. There may still be risks, but it's better than eating it raw. Some of the stuff I've seen - idk how you'd ever know for sure. Like ya said, that's above my abilities. 🤷‍♂️

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Thas just tea tho...

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Huskies said:

Weight isn't jiggling, but I also have extra coins taped on top since I normally run it at 16 psi.

I don't see any steam leaving elsewhere, I had re-oiled.re-stretched the inner ring as well.

Hopefully it's just the weight that needs to be tighetened up, I do see gaps.

3 hours should be enough at 12 psi for quart jars?

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Huskies said:

Weight isn't jiggling, but I also have extra coins taped on top since I normally run it at 16 psi.

I don't see any steam leaving elsewhere, I had re-oiled.re-stretched the inner ring as well.

Hopefully it's just the weight that needs to be tighetened up, I do see gaps.

3 hours should be enough at 12 psi for quart jars?

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1. It's definitely possible to lose steam in spots without actually seeing it.

2.. If in ANY doubt, you should just go ahead and replace your sealing ring and overpressure plug. Also, get some mineral oil and keep them oiled up.

3. As others mentioned, your pressure gauge could be off.

4. I'd recommend removing and inspecting the pressure gauge, cleaning out the opening, and inspecting the gasket which seals it to the lid.

On my oldest Presto, I had that gasket crap out on me- took forever to figure outbwhere rhe problem was- and I was unable to source a replacement. So I smeared RTV siliconee ok the whole assembly and put it back together. Been working like a charm for the past several years.



Edit: kept getting interrupted while writing this, so just wanted to add: seconding what everyone else said, too.

Huskies said:

Cheers, ty everyone!

@arky: were you doing quart jars or half pints / pints?

No luck with quart jars on my end in the instant pot.

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Always 4 quart jars at a time and I have 2 8 quart instant pots still. i ran them side by side doing 8 jars each 2.5 hours.

tryptkaloids said:

Huskies said:

What would make a presto 23qt cap out at 12.5 psi?

Only thing I can see is maybe the weight could be tightened up, I can see some gaps.

Still, super weird. I'll run it for 2:30 to 3 hours instead and hopefully that'll be fine

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Is the weight jiggling?

Either the guage is going out or the seal is.

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Nokumana said:

I'm about to run my first set of grain jars. I'm using Pastywhites's unmodified plastic jar lids.

What is the prevailing wisdom on the silicone gasket that comes with each lid? To use or not to use?

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Mr Piggy said:

My lids are ten year old while ball lids that never had gaskets, work like a charm.

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Well my lids are not ten years old, but I started out with unmodified leak-proof lids, worked okay, but got annoyed with having to close and open after a shake, tried filter stickers, worked okay, finally I got myself some thick quality SFD's and used RTV to glue them in place, I am never going back, they're awesome.

Kloakk said:

Mr Piggy said:

My lids are ten year old while ball lids that never had gaskets, work like a charm.

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Well my lids are not ten years old, but I started out with unmodified leak-proof lids, worked okay, but got annoyed with having to close and open after a shake, tried filter stickers, worked okay, finally I got myself some thick quality SFD's and used RTV to glue them in place, I am never going back, they're awesome.

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I do it the same way! If you shine a flashlight on the back of the lid, you can spot any tiny gaps around the seal. Believe me, it’s a bummer when you take a grain jar out of the pressure cooker and it’s way wetter than the others because of a tiny hole didn't seal.