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InvisibleSuckatshrooms
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Registered: 09/26/22
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Presto Pressure Cooker PSA
    #28015778 - 10/25/22 11:36 AM (2 years, 2 months ago)

For anyone that has the presto pressure cooker, replace the cheap 1/8” gauge with a better 1/4” glycerin filled gauge. The presto gauge measures 2-3psi off right out of the box and if it’s accurate out of the box, it probably won’t be for long.

Edited by Suckatshrooms (10/25/22 12:50 PM)

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OfflineBubbaluch
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Re: Presto Pressure Cooker PSA [Re: Suckatshrooms]
    #28015784 - 10/25/22 11:42 AM (2 years, 2 months ago)

How did you test your presto to come to the conclusion the gauge was off by 2-3 psi?

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OfflineScrewup
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Re: Presto Pressure Cooker PSA [Re: Suckatshrooms]
    #28015791 - 10/25/22 11:47 AM (2 years, 2 months ago)

Did the weight not jiggle at 15PSI?

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OfflineBajazly
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Re: Presto Pressure Cooker PSA [Re: Bubbaluch]
    #28015793 - 10/25/22 11:48 AM (2 years, 2 months ago)

As soon as mine hits 15 psi the rocker starts doing its thing like clockwork. That being said, gauges are notoriously off but generally they will be relative meaning at 15 psi they may read 12 or 17 or... As long as you know how much it is off then you have frame of reference that things are correct.

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InvisibleGuerrilla
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Re: Presto Pressure Cooker PSA [Re: Bajazly] * 1
    #28015806 - 10/25/22 11:59 AM (2 years, 2 months ago)

Link?


--------------------
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InvisibleSuckatshrooms
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Re: Presto Pressure Cooker PSA [Re: Bubbaluch]
    #28015808 - 10/25/22 11:59 AM (2 years, 2 months ago)

Quote:

Bubbaluch said:
How did you test your presto to come to the conclusion the gauge was off by 2-3 psi?



I replaced with a fluid filled gauge just because I prefer them. When then the new gauge read different, I attached the old gauge to my air compressor and tested against my calibrated regulator for the air dryer. The calibrated gauge and new gauge both disagreed with the presto gauge.

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InvisibleSuckatshrooms
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Re: Presto Pressure Cooker PSA [Re: Screwup]
    #28015811 - 10/25/22 12:00 PM (2 years, 2 months ago)

Quote:

Screwup said:
Did the weight not jiggle at 15PSI?



The pressure regulator starts jiggling at around 11 psi.

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InvisibleSuckatshrooms
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Re: Presto Pressure Cooker PSA [Re: Bajazly]
    #28015812 - 10/25/22 12:01 PM (2 years, 2 months ago)

Quote:

Bajazly said:
As soon as mine hits 15 psi the rocker starts doing its thing like clockwork. That being said, gauges are notoriously off but generally they will be relative meaning at 15 psi they may read 12 or 17 or... As long as you know how much it is off then you have frame of reference that things are correct.



Mine did too, or so I thought.

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OfflineBajazly
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Re: Presto Pressure Cooker PSA [Re: Guerrilla]
    #28015819 - 10/25/22 12:04 PM (2 years, 2 months ago)

Quote:

Guerrilla said:
Link?




Not sure if this was @me but if so, I've been working with stuff with pressure gauges for years and it's just what I have noticed.

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InvisibleGuerrilla
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Re: Presto Pressure Cooker PSA [Re: Bajazly]
    #28015822 - 10/25/22 12:05 PM (2 years, 2 months ago)

No, OP


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OfflineBajazly
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Re: Presto Pressure Cooker PSA [Re: Suckatshrooms]
    #28015840 - 10/25/22 12:13 PM (2 years, 2 months ago)

Quote:

Suckatshrooms said:
Quote:

Bajazly said:
As soon as mine hits 15 psi the rocker starts doing its thing like clockwork. That being said, gauges are notoriously off but generally they will be relative meaning at 15 psi they may read 12 or 17 or... As long as you know how much it is off then you have frame of reference that things are correct.



Mine did too, or so I thought.




Until the pin or the pin seat on the vent valve starts getting wazzled out a little bit I would trust the weight. Gauges have more moving parts to go bad and unless you are having them calibrated all the time they will always go bad/read different over time.

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InvisibleSuckatshrooms
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Re: Presto Pressure Cooker PSA [Re: Bajazly]
    #28015849 - 10/25/22 12:17 PM (2 years, 2 months ago)

Quote:

Bajazly said:
Quote:

Suckatshrooms said:
Quote:

Bajazly said:
As soon as mine hits 15 psi the rocker starts doing its thing like clockwork. That being said, gauges are notoriously off but generally they will be relative meaning at 15 psi they may read 12 or 17 or... As long as you know how much it is off then you have frame of reference that things are correct.



Mine did too, or so I thought.




Until the pin or the pin seat on the vent valve starts getting wazzled out a little bit I would trust the weight. Gauges have more moving parts to go bad and unless you are having them calibrated all the time they will always go bad/read different over time.



Yes, absolutely. That’s why I was saying if the shitty presto gauge reads good out of the box it probably won’t for long. The glycerin filled gauges have always lasted longer for me.

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OfflineTheUsualSuspect
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Re: Presto Pressure Cooker PSA [Re: Suckatshrooms]
    #28025470 - 10/31/22 12:53 AM (2 years, 2 months ago)

Quote:

Suckatshrooms said:
replace the cheap 1/8” gauge with a better 1/4” glycerin filled gauge.




Do you have a link to a suitable replacement gauge? I would like to do research.

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InvisibleSuckatshrooms
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Re: Presto Pressure Cooker PSA [Re: TheUsualSuspect]
    #28025765 - 10/31/22 08:55 AM (2 years, 2 months ago)

Quote:

TheUsualSuspect said:
Quote:

Suckatshrooms said:
replace the cheap 1/8” gauge with a better 1/4” glycerin filled gauge.




Do you have a link to a suitable replacement gauge? I would like to do research.




No, because the max temp of glycerin is too low for use in pressure cooker, even if it is accurate for now! I should have looked at the specs more closely. I’ve just always used them for everything else and didn’t think of the temp. If this one dies, I think I’ll get the AA PC replacement that has the dual gauge with temp.🤷

Edited by Suckatshrooms (10/31/22 08:56 AM)

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OfflineSirPsycho
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Re: Presto Pressure Cooker PSA [Re: Suckatshrooms]
    #28025779 - 10/31/22 09:09 AM (2 years, 2 months ago)

Quote:

Suckatshrooms said:
Quote:

TheUsualSuspect said:
Quote:

Suckatshrooms said:
replace the cheap 1/8” gauge with a better 1/4” glycerin filled gauge.




Do you have a link to a suitable replacement gauge? I would like to do research.




No, because the max temp of glycerin is too low for use in pressure cooker, even if it is accurate for now! I should have looked at the specs more closely. I’ve just always used them for everything else and didn’t think of the temp. If this one dies, I think I’ll get the AA PC replacement that has the dual gauge with temp.🤷



The manual for AA pressure cookers straight up tells you the gauges are not accurate and you should just rely on the rocker


--------------------
:pm:Ask about free prints: Ps tampanesis, subtropicalis, cubensis(ESS) and Pan cyanescens:pm:
Balance in life is like running on ice.

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InvisibleSuckatshrooms
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Re: Presto Pressure Cooker PSA [Re: SirPsycho]
    #28025905 - 10/31/22 10:37 AM (2 years, 2 months ago)

Quote:

SirPsycho said:
Quote:

Suckatshrooms said:
Quote:

TheUsualSuspect said:
Quote:

Suckatshrooms said:
replace the cheap 1/8” gauge with a better 1/4” glycerin filled gauge.




Do you have a link to a suitable replacement gauge? I would like to do research.




No, because the max temp of glycerin is too low for use in pressure cooker, even if it is accurate for now! I should have looked at the specs more closely. I’ve just always used them for everything else and didn’t think of the temp. If this one dies, I think I’ll get the AA PC replacement that has the dual gauge with temp.🤷



The manual for AA pressure cookers straight up tells you the gauges are not accurate and you should just rely on the rocker



Yeah, that’s my whole problem with the presto gauge as well. The presto jiggle weight wasn’t accurate, and I trim it to precise pressure with steel washers. But I can’t tell what pressure it’s trimmed to without an accurate gauge. Before I retired, I worked in healthcare and the steam gauges for the autoclaves were calibrated guaranteed for 5 years, but in reality they stayed accurate for well over 5 years. This glycerin gauge is working well, but now I’m just afraid it’ll explode one day.😝

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OfflineSirPsycho
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Re: Presto Pressure Cooker PSA [Re: Suckatshrooms] * 1
    #28025912 - 10/31/22 10:42 AM (2 years, 2 months ago)

The weights are accurate, the gauges aren't. Trust your rocker weight


--------------------
:pm:Ask about free prints: Ps tampanesis, subtropicalis, cubensis(ESS) and Pan cyanescens:pm:
Balance in life is like running on ice.

  🅑🅞🅣🅣🅛🅔 🅖🅐🅝🅖

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InvisibleSuckatshrooms
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Re: Presto Pressure Cooker PSA [Re: SirPsycho]
    #28026434 - 10/31/22 03:53 PM (2 years, 2 months ago)

Quote:

SirPsycho said:
The weights are accurate, the gauges aren't. Trust your rocker weight



Don’t bet on it. I had to buy a new jiggle weight. I got the kind that’s adjustable for 5,10 or 15lbs. It starts rocking perfect right at 15psi now, but if I didn’t have the good gauge, I wouldn’t have ever known the weight was bad. Just for curiosity sake, will anyone else with a presto weigh their weight for me. I’m curious if the actual weight is wrong or if it was something else causing it to not function properly. Maybe the cone could be misshapen.

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OfflineLowDownDennis
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Re: Presto Pressure Cooker PSA [Re: Suckatshrooms]
    #28026653 - 10/31/22 05:54 PM (2 years, 2 months ago)

Watching

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OfflineTheUsualSuspect
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Re: Presto Pressure Cooker PSA [Re: LowDownDennis] * 1
    #28027063 - 10/31/22 09:51 PM (2 years, 2 months ago)

I found out where we are all screwing up. We just need to get the pressure cooker testing gauge kit. I'm sure its both cheap and commonly available:



although at the end it does say the weighted gauge canners dont need to be tested.

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OfflineSingularFusion
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Re: Presto Pressure Cooker PSA [Re: TheUsualSuspect]
    #28027186 - 11/01/22 12:01 AM (2 years, 2 months ago)

I don't understand why the master gauge is trusted to be any more accurate than the gauge on the PC. It surely suffers from the same issues, no? it is after all just another presto gauge, so...

trust the weight for sure, but yeah can anybody weigh one for us please, and tell us what psi you are typically running at that weight?

Cheers fellas

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Invisiblebigfootscreepyuncl
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Re: Presto Pressure Cooker PSA [Re: SingularFusion]
    #28027198 - 11/01/22 12:23 AM (2 years, 2 months ago)

I just did a quick 5 minute search and couldn't find the test tool they used. I did find out that it only costs $5 at my local university to get mine tested and calibrated though. I'll probably just do that unless the test pump is like $40. If that's the case I'll probably get one and test my gauge monthly during my cult season


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Invisiblebigfootscreepyuncl
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Re: Presto Pressure Cooker PSA [Re: bigfootscreepyuncl] * 1
    #28027199 - 11/01/22 12:31 AM (2 years, 2 months ago)

I'm having issues uploading pictures at the moment but my 15psi Presto toggle weight weighs 85.77g


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OfflineTheUsualSuspect
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Re: Presto Pressure Cooker PSA [Re: SingularFusion]
    #28027261 - 11/01/22 01:22 AM (2 years, 2 months ago)

Quote:

Nef said:
I don't understand why the master gauge is trusted to be any more accurate than the gauge on the PC.




In gauging and inspection, gauges need certified at specified times. That gauge in the video is sent back to presto once a year for re calibration and re certification.

I suspect if someone asked presto, they might be able to re check and re certify a customers gauge but given how many are out in circulation, presto might refuse to prevent an avalanche of requests.

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OfflineSingularFusion
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Re: Presto Pressure Cooker PSA [Re: TheUsualSuspect]
    #28027292 - 11/01/22 01:45 AM (2 years, 2 months ago)

cheers for explaining suspect

cheers for weighing yours bigfoot, gonna have a look at mine closely but I assume all is ok because I achieve sterilisation

I am running extra weight on mine to hit like 18psi+ regularly

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InvisibleSuckatshrooms
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Re: Presto Pressure Cooker PSA [Re: bigfootscreepyuncl]
    #28027340 - 11/01/22 02:49 AM (2 years, 2 months ago)

Quote:

bigfootscreepyuncl said:
I'm having issues uploading pictures at the moment but my 15psi Presto toggle weight weighs 85.77g



My bad weight is 84.6g and my new good one in 92g.

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InvisibleBaba Yaga
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Re: Presto Pressure Cooker PSA [Re: Suckatshrooms]
    #28027919 - 11/01/22 02:39 PM (2 years, 2 months ago)

I got two weights, one is 86.4g and I add 16.2g to it which together makes the weight jiggle @ 17psi on my clock.

EDIT: The second weight is 86.3g and additional washers weigh 16.2g, only 0.2g difference.





I think the other weight is one gram lighter and starts jiggling @ 16.5 psi but I have to weigh the whole thing incl. washers to confirm. Got it jiggling at the moment, will update tomorrow.

I only use the gauges to see how far away I am approximately before the weight starts to jiggle so I am not meandering too far away from the PC. Got my setting of the gas burner pretty much down and just have to dial it back and can go about my day. What I can say is that the gauge has not changed in the last 4 years, it still shows the same values (17psi/16.5psi)

We got pretty hard water here and I have to add vinegar when filling the PC and when I take the lid off I do twist a piece of kitchen paper to make a wick and put it up the gauge opening on the inside of the lid to get the water out. There is quite a bit in there. Maybe that does help.

Edited by Baba Yaga (11/02/22 03:03 PM)

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OfflineSirPsycho
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Re: Presto Pressure Cooker PSA [Re: Baba Yaga]
    #28027925 - 11/01/22 02:41 PM (2 years, 2 months ago)

Quote:

Baba Yaga said:
I got two weights, one is 86.4g and I add 16.2g to it which together makes the weight jiggle @ 17psi on my clock.




I think the other weight is one gram lighter and starts jiggling @ 16.5 psi but I have to weigh the whole thing incl. washers to confirm. Got it jiggling at the moment, will update tomorrow.

I only use the gauges to see how far away I am approximately before the weight starts to jiggle so I am not meandering too far away from the PC. Got my setting of the gas burner pretty much down and just have to dial it back and can go about my day. What I can say is that the gauge has not changed in the last 4 years, it still shows the same values (17psi/16.5psi)

We got pretty hard water here and I have to add vinegar when filling the PC and when I take the lid off I do twist a piece of kitchen paper to make a wick and put it up the gauge opening on the inside of the lid to get the water out. There is quite a bit in there. Maybe that does help.



I got really hard water too, you got any tips for removing build up?


--------------------
:pm:Ask about free prints: Ps tampanesis, subtropicalis, cubensis(ESS) and Pan cyanescens:pm:
Balance in life is like running on ice.

  🅑🅞🅣🅣🅛🅔 🅖🅐🅝🅖

"Mist your balls and fan your asshole" - Pandaskis, 2023

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OfflineSeaSalt
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Re: Presto Pressure Cooker PSA [Re: Suckatshrooms]
    #28027938 - 11/01/22 02:48 PM (2 years, 2 months ago)

Quote:

Suckatshrooms said:
Quote:

SirPsycho said:
The weights are accurate, the gauges aren't. Trust your rocker weight



Don’t bet on it. I had to buy a new jiggle weight. I got the kind that’s adjustable for 5,10 or 15lbs. It starts rocking perfect right at 15psi now, but if I didn’t have the good gauge, I wouldn’t have ever known the weight was bad. Just for curiosity sake, will anyone else with a presto weigh their weight for me. I’m curious if the actual weight is wrong or if it was something else causing it to not function properly. Maybe the cone could be misshapen.



87.1g Presto 23 qt jiggle weight


--------------------
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InvisibleSuckatshrooms
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Re: Presto Pressure Cooker PSA [Re: SirPsycho]
    #28027947 - 11/01/22 02:53 PM (2 years, 2 months ago)

Quote:

SirPsycho said:
Quote:

Baba Yaga said:
I got two weights, one is 86.4g and I add 16.2g to it which together makes the weight jiggle @ 17psi on my clock.




I think the other weight is one gram lighter and starts jiggling @ 16.5 psi but I have to weigh the whole thing incl. washers to confirm. Got it jiggling at the moment, will update tomorrow.

I only use the gauges to see how far away I am approximately before the weight starts to jiggle so I am not meandering too far away from the PC. Got my setting of the gas burner pretty much down and just have to dial it back and can go about my day. What I can say is that the gauge has not changed in the last 4 years, it still shows the same values (17psi/16.5psi)

We got pretty hard water here and I have to add vinegar when filling the PC and when I take the lid off I do twist a piece of kitchen paper to make a wick and put it up the gauge opening on the inside of the lid to get the water out. There is quite a bit in there. Maybe that does help.



I got really hard water too, you got any tips for removing build up?



You can just neutralize the water to 6 pH with acetic acid.

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InvisibleBaba Yaga
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Re: Presto Pressure Cooker PSA [Re: SirPsycho]
    #28027968 - 11/01/22 03:03 PM (2 years, 2 months ago)

I think the water here is as hard as it can get. When I make a sterile water syringe there always precipitates a lot of lime when boiling tap water for 10 min in a pot with lid. Also ended up with sediment in LCs when using tap, it's all RO water now.

What I do is add 20-30 ml of 5% vinegar to the 3 quart of water that go in and there is virtually no buildup inside the PC. The only area that does require cleaning once a year or every two years is around the jiggle weight and the pipe the weight sits on. I use a kitchen paper soaked with vinegar or citric acid solution and put is on the lime scale on the lid and clean the softened scale off with one of those non-scratch scrubbing pads. The pipe I clean with a soaked cotton bud. The earlier you do it the easier it is, I'm lazy when it comes to this kind of things though.


Last time I made jars I forgot to add vinegar and when I got the jars out they had a lot of lime on the outside. Touching them after they had dried was like someone screeching with a piece of chalk on a black board.

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OfflineBajazly
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Re: Presto Pressure Cooker PSA [Re: Baba Yaga]
    #28028036 - 11/01/22 03:44 PM (2 years, 2 months ago)

87 gs Presto 23 qt jiggle weight, kicks off dead on 15 psi and the PC is brand new. Used it about 4 times so far.

The other variable is the diameter of the hole in the stem the weight sits on. Its pretty small so it wouldn't take much diameter difference to get it off a bit.

Edited by Bajazly (11/01/22 03:47 PM)

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OfflineSirPsycho
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Re: Presto Pressure Cooker PSA [Re: Baba Yaga]
    #28028066 - 11/01/22 04:02 PM (2 years, 2 months ago)

Quote:

Baba Yaga said:
I think the water here is as hard as it can get. When I make a sterile water syringe there always precipitates a lot of lime when boiling tap water for 10 min in a pot with lid. Also ended up with sediment in LCs when using tap, it's all RO water now.

What I do is add 20-30 ml of 5% vinegar to the 3 quart of water that go in and there is virtually no buildup inside the PC. The only area that does require cleaning once a year or every two years is around the jiggle weight and the pipe the weight sits on. I use a kitchen paper soaked with vinegar or citric acid solution and put is on the lime scale on the lid and clean the softened scale off with one of those non-scratch scrubbing pads. The pipe I clean with a soaked cotton bud. The earlier you do it the easier it is, I'm lazy when it comes to this kind of things though.


Last time I made jars I forgot to add vinegar and when I got the jars out they had a lot of lime on the outside. Touching them after they had dried was like someone screeching with a piece of chalk on a black board.



Mine isn't quite that bad but my jars are definitely cloudy.

I'll give it a go soon. The build up is messing up the rocker


--------------------
:pm:Ask about free prints: Ps tampanesis, subtropicalis, cubensis(ESS) and Pan cyanescens:pm:
Balance in life is like running on ice.

  🅑🅞🅣🅣🅛🅔 🅖🅐🅝🅖

"Mist your balls and fan your asshole" - Pandaskis, 2023

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InvisibleSuckatshrooms
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Re: Presto Pressure Cooker PSA [Re: SirPsycho]
    #28028073 - 11/01/22 04:06 PM (2 years, 2 months ago)

Quote:

SirPsycho said:
Quote:

Baba Yaga said:
I think the water here is as hard as it can get. When I make a sterile water syringe there always precipitates a lot of lime when boiling tap water for 10 min in a pot with lid. Also ended up with sediment in LCs when using tap, it's all RO water now.

What I do is add 20-30 ml of 5% vinegar to the 3 quart of water that go in and there is virtually no buildup inside the PC. The only area that does require cleaning once a year or every two years is around the jiggle weight and the pipe the weight sits on. I use a kitchen paper soaked with vinegar or citric acid solution and put is on the lime scale on the lid and clean the softened scale off with one of those non-scratch scrubbing pads. The pipe I clean with a soaked cotton bud. The earlier you do it the easier it is, I'm lazy when it comes to this kind of things though.


Last time I made jars I forgot to add vinegar and when I got the jars out they had a lot of lime on the outside. Touching them after they had dried was like someone screeching with a piece of chalk on a black board.



Mine isn't quite that bad but my jars are definitely cloudy.

I'll give it a go soon. The build up is messing up the rocker



Use a pH strip or meter to figure out how much you need to add. Shoot for 6. As long as your water has a stable pay, you only need to figure this out once.

Edited by Suckatshrooms (11/01/22 04:07 PM)

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