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 > Leak down test on the LP gas system, leak detected.

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SCADAMAN29325

Clinton, SC

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Posted: 01/19/23 03:06pm Link  |  Quote  |  Print  |  Notify Moderator

Could I add a 90° fitting here? That fitting to a POL fitting for my grill?

[image]


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enblethen

Moses Lake, WA

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Posted: 01/19/23 04:40pm Link  |  Quote  |  Print  |  Notify Moderator

Do not use the side port on the smaller regulator.


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wolfe10

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Posted: 01/20/23 07:50am Link  |  Quote  |  Print  |  Notify Moderator

enblethen wrote:

Do not use the side port on the smaller regulator.


Correct. Do not use the first stage plug for anything.

If your grill requires full propane PSI, "T" in between POL and regulator.

If the grill requires 11 column inches water PSI, "T" in after the regulator.


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SCADAMAN29325

Clinton, SC

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Posted: 03/28/23 11:31am Link  |  Quote  |  Print  |  Notify Moderator

Hey everybody, finally got around to doing the leak down test. (TLDR, go to 'Present')

Background:
Calhoun Falls State Park, on our 5th night there back in Feb, I had a dream that something was making an alarm sound. Nope not a dream, the new propane leak detector was going off. Never heard it before so it took me a minute to figure what was making that noise alarm. Anyways, I opened the door to let any gas flow out. Sure enough it stopped yelling at me and I went back to sleep. (Yeah, not the dumbest thing I ever did, but close to it.) 2 hours later it went off again. This time I shut off the propane tank. It was cold outside, but the little electric heater we was doing OK, so I went back to sleep again.

Actually I had forgot about that issue, till I was reviewing my to-do list, but by then we were prepping for Myrtle Beach State Park and didn't have time to look into the issue.

So at MBSP same thing almost. We spent our week watching planes go overhead and it was great! Let the COLD waves wash over our feet and then walked to the end of the pier. On the way back traffic was horrible going out on hwy 501 AND on both sides of Columbia on I-20 / I-26 (note to self: DON'T GO THROUGH COLUMBIA AROUND 5PM!). We were had just got into Columbia when that alarm started again. Found a parking lot, opened the door, waved the gas out the door. 10 minutes later it went off again. I shut off the propane, we had the fridge running on gas while in transit, moved the ice trays from the freezer to the fridge to help it stay cool for that last 2 hours home. Yes, 3 hours, not the normal 1 hour. Two, TWO! Two Tractor trailers had broke down on I-26 in the construction zones, no way for them to pull off the road. Spicy words were spoken often.

Present:
Just built the manometer with 5/8" clear tube, a 1x4 2ft long and zip ties. (https://youtu.be/QnlfQK-8qy4) Hooked it up and did a measurement, 12" of water column, close enough for me. And it was rock solid, for a minute, then it dropped all of a sudden. I was going to bleed off a little pressure to see if the shutoff valve had a bypass leak. When I touch the stove knob, that's when it dropped. Hmm... tried it again, no drop. Went around banging on stove, fridge, furnace and water heater no more sudden dropping, till after the banging, it did again, just dropped after about a minute and then slowly went down.

So now I need to find the propane leak. After some more thinking I will probably order a sniffer off Amazon to help find where the leak is.

STRANGE how it drops all of a sudden after a minute, then slowly leaks down.

Before the drop (6" mark)



[image]

After dropping:
[image]


Edit, added this pic:
[image]

* This post was edited 03/30/23 07:19am by SCADAMAN29325 *

Grit dog

Black Diamond, WA

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Posted: 03/28/23 12:55pm Link  |  Quote  |  Print  |  Notify Moderator

Cool!
I usually just use soap water in a spray bottle.


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opnspaces

San Diego Ca

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Posted: 03/28/23 07:54pm Link  |  Quote  |  Print  |  Notify Moderator

Just trying to come up with some ideas. Are you sure your attachment to the manometer is solid and leak free?

Assuming solid and leak free then I'm assuming an appliance is trying to start gas flow and that's when it drops.

Is the refrigerator on Propane? If so try putting the refrigerator on Electric or better yet just turn it off. It will easily stay cold for 2 hours with the door closed. Does the dropping stop?

Is the oven possibly on? I mean on as if baking and not just on pilot and you didn't realize it?

The furnace should be obvious because the fan will run first before it calls for propane

The water heater? I'm guessing no because you saw it drop twice and the water heater cycles on very infrequently.


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SCADAMAN29325

Clinton, SC

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Posted: 03/29/23 09:35am Link  |  Quote  |  Print  |  Notify Moderator

Solid connection, I wiggled tube to be sure.

Everything should be off.

I'll be doing some more looking and sniffing.

When I find the area I will do more soapy water testing.

Thanks

enblethen

Moses Lake, WA

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Posted: 03/29/23 03:11pm Link  |  Quote  |  Print  |  Notify Moderator

Remember to check the regulator! Soap down the vent!

SCADAMAN29325

Clinton, SC

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Posted: 03/30/23 07:15am Link  |  Quote  |  Print  |  Notify Moderator

****! Everything SHOULD be off!
After seeing that the water column dropped every 3 minutes (charged the lines, start stopwatch, saw drop, repeat...) I went around and checked all the appliances, I found the fridge was still on! I thought FOR SURE it was off, but could not see the lights due to the angle I was at!

Sometimes you just have to tattle tell on yourself!
Jeez Phil how stupid you can be sometimes!

Anyways this still does not resolve my problem of the propane sensor going off. That was yesterday, will continue troubleshooting today.

Should I post this or not...?

SCADAMAN29325

Clinton, SC

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Posted: 03/30/23 09:00am Link  |  Quote  |  Print  |  Notify Moderator

FORK! STILL HAPPENING! 2.5 minutes it drops all of a sudden! Yes, fridge is off, furnace is off, water heater is off, stove is off, water heater is off, I do not have an oven.

What else could it be?

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