Slickdeals is community-supported.  We may get paid by brands for deals, including promoted items.
Missed This Deal? Get alerts when similar deals are posted.
  1. Deal Image
Item 1 of 6
  1. Deal Image
  2. Deal Image
  3. Deal Image
  4. Deal Image
Item 1 of 6
expiredRokket | Staff posted Apr 18, 2026 5:56 AM

Flame King Universal Propane Tank Gauge Level Indicator

$11

$22

50% off
Amazon
58 Comments
43.9K Views
Visit Amazon
Deal Details
Amazon has Flame King Universal Propane Tank Gauge Level Indicator on sale for $10.68. Shipping is free w/ Prime or on orders $35+.

Home Depot has Flame King Universal Propane Tank Gauge Level Indicator on sale for $10.68. Shipping is free.

Thanks to Deal Hunter Rokket for sharing this deal.

Product Details:
  • Features glow-in-the-dark dial for easy reading
  • Emergency flow control detects and restricts leaks
  • Type-1 connection lets you connect to appliances easily

Editor's Notes

Written by citan359 | Staff
  • About this Deal:
    • Our research indicates that this deal is $3.31 less (23.66% savings) than the next best available price from a reputable merchant with prices starting at $13.99 at the time of this posting.
  • About this Store:
  • Additional Notes:
    • Please see the original post for additional details & give the WIKI and additional forum comments a read for helpful discussion.

Original Post

Written by Rokket | Staff
Community Notes
About the Poster
Deal Details
Community Notes
About the Poster
Amazon has Flame King Universal Propane Tank Gauge Level Indicator on sale for $10.68. Shipping is free w/ Prime or on orders $35+.

Home Depot has Flame King Universal Propane Tank Gauge Level Indicator on sale for $10.68. Shipping is free.

Thanks to Deal Hunter Rokket for sharing this deal.

Product Details:
  • Features glow-in-the-dark dial for easy reading
  • Emergency flow control detects and restricts leaks
  • Type-1 connection lets you connect to appliances easily

Editor's Notes

Written by citan359 | Staff
  • About this Deal:
    • Our research indicates that this deal is $3.31 less (23.66% savings) than the next best available price from a reputable merchant with prices starting at $13.99 at the time of this posting.
  • About this Store:
  • Additional Notes:
    • Please see the original post for additional details & give the WIKI and additional forum comments a read for helpful discussion.

Original Post

Written by Rokket | Staff

Community Voting

Deal Score
+126
Good Deal
Visit Amazon

Top Comments

chapalappa
4Comments
18Reputation
I almost never comment, but I use this in my classroom as an example of products sold that aim to use lack of knowledge to spereate money from a consumer. The pressure inside a closed cylinder is consistent regardless of how much liquid refrigerant is inside of it. Whether you have 20 lb of liquid propane or 1 oz of liquid propane in the tank, your pressures remain constant for the given temperature. The only thing this does is when you're cooking burgers on the grill and your flame dies out, you take a look at the gauge and it confirms what you already knew, that you're out of gas. The only way to actually know how much you have left is using its weight, so like a fish scale that measures the weight of the cylinder. Just my 2 cents Smilie
Go to Comment
jaredalanmitchell
1.4KComments
259Reputation
Depending on your needs, there's a "splitter" version of these from many other brands. I've had very good luck with ours.

I like them as you can use it with just one device hooked up, but when we go camping I can split our tank to two hookups (grill & camping stove etc).

https://www.amazon.com/Luney-Prop...B0FL7K5PYT
Go to Comment
DougLife_
145Comments
72Reputation
The issue with these is that gasses expand to fill space with the pressure being dependent on temperature, so as long as there is any liquid propane left in the tank the pressure will be basically the same between a mostly empty and full tank. This means that until the tank is just full of gaseous propane as the very last amount is dispensed, the gauge will read full and then rapidly drop. The proper way to measure the fullness is a scale or… just pick up the tank and shake it around to listen for the propane sloshing around inside.
Go to Comment

Join The Conversation

Share your experience with the Slickdeals community

Share information with the community. Please follow our Community Guidelines and be kind!

58 Comments

Sign up for a Slickdeals account to remove this ad.

Apr 18, 2026 4:57 PM
4.2K Comments
Joined Oct 2015
pyroskater85Apr 18, 2026 4:57 PM
4.2K Comments
I believe if you buy a tank from Costco it has a built in gauge already. if your planning on buying it from Costco.
1
Apr 18, 2026 5:00 PM
295 Comments
Joined Oct 2006
C_KentApr 18, 2026 5:00 PM
295 Comments
Quote from nymnyr8694 :
Should always have a backup tank. No need for a gauge of any sort.
Ok buddy.
6
Apr 18, 2026 5:00 PM
680 Comments
Joined Jul 2008
GoPadreApr 18, 2026 5:00 PM
680 Comments
Just pick up tank to gauge the weight - being doing that successfully for years

And also, have a full backup tank on standby. The worst is grilling and tank runs out sans a back-up
3
Apr 18, 2026 5:16 PM
145 Comments
Joined Dec 2008
DougLife_Apr 18, 2026 5:16 PM
145 Comments

Our community has rated this post as helpful. If you agree, why not thank DougLife_

The issue with these is that gasses expand to fill space with the pressure being dependent on temperature, so as long as there is any liquid propane left in the tank the pressure will be basically the same between a mostly empty and full tank. This means that until the tank is just full of gaseous propane as the very last amount is dispensed, the gauge will read full and then rapidly drop. The proper way to measure the fullness is a scale or… just pick up the tank and shake it around to listen for the propane sloshing around inside.
4
Apr 18, 2026 5:25 PM
1.2K Comments
Joined Feb 2006
FlipBumWallaApr 18, 2026 5:25 PM
1.2K Comments
How safe are things like this? One more place for a potential leak?
1
Apr 18, 2026 5:49 PM
220 Comments
Joined Jan 2023
BeautifulWallaby506Apr 18, 2026 5:49 PM
220 Comments

Our community has rated this post as helpful. If you agree, why not thank BeautifulWallaby506

Inline pressure base Gauge does not work. Don't waste your money.
1
1
Apr 18, 2026 5:50 PM
4 Comments
Joined Jun 2015
chapalappaApr 18, 2026 5:50 PM
4 Comments

Our community has rated this post as helpful. If you agree, why not thank chapalappa

I almost never comment, but I use this in my classroom as an example of products sold that aim to use lack of knowledge to spereate money from a consumer. The pressure inside a closed cylinder is consistent regardless of how much liquid refrigerant is inside of it. Whether you have 20 lb of liquid propane or 1 oz of liquid propane in the tank, your pressures remain constant for the given temperature. The only thing this does is when you're cooking burgers on the grill and your flame dies out, you take a look at the gauge and it confirms what you already knew, that you're out of gas. The only way to actually know how much you have left is using its weight, so like a fish scale that measures the weight of the cylinder. Just my 2 cents Smilie
23
3
3

Sign up for a Slickdeals account to remove this ad.

Apr 18, 2026 6:02 PM
1.1K Comments
Joined Nov 2011
freakingwillyApr 18, 2026 6:02 PM
1.1K Comments
Quote from pyroskater85 :
I believe if you buy a tank from Costco it has a built in gauge already. if your planning on buying it from Costco.
My grill has the hose feed from the right and it's not long enough to loop around. This forces me to use the Costco tank with the feed going to the right and the built in gauge facing the back of the grill, making it impossible to read. You cannot turn the gauge, it is permanently fixed.
Quote from chapalappa :
I almost never comment, but I use this in my classroom as an example of products sold that aim to use lack of knowledge to spereate money from a consumer. The pressure inside a closed cylinder is consistent regardless of how much liquid refrigerant is inside of it. Whether you have 20 lb of liquid propane or 1 oz of liquid propane in the tank, your pressures remain constant for the given temperature. The only thing this does is when you're cooking burgers on the grill and your flame dies out, you take a look at the gauge and it confirms what you already knew, that you're out of gas. The only way to actually know how much you have left is using its weight, so like a fish scale that measures the weight of the cylinder. Just my 2 cents Smilie
I have this Flame King version from Home Depot and an Expert Grill gauge that I got from a Walmart clearance a few years back, both are actually pretty accurate. From the start of a grilling session to the end, I can see that the pressure does drop and even when the gauge says "low", I can still squeeze out a few burgers before the tank empties.

I prefer the Flame King version because the dial can be rotated. The Expert Grill version cannot, so when mounted on my grill, the gauge is upside-down. It doesn't affect performance, but it's just weird to look at.
1
Apr 18, 2026 6:02 PM
10.2K Comments
Joined Sep 2007
Santa_ClausApr 18, 2026 6:02 PM
10.2K Comments
Quote from GoPadre :
Just pick up tank to gauge the weight - being doing that successfully for years

And also, have a full backup tank on standby. The worst is grilling and tank runs out sans a back-up
This.
2
Apr 18, 2026 6:03 PM
10.2K Comments
Joined Sep 2007
Santa_ClausApr 18, 2026 6:03 PM
10.2K Comments
Quote from chapalappa :
I almost never comment, but I use this in my classroom as an example of products sold that aim to use lack of knowledge to spereate money from a consumer. The pressure inside a closed cylinder is consistent regardless of how much liquid refrigerant is inside of it. Whether you have 20 lb of liquid propane or 1 oz of liquid propane in the tank, your pressures remain constant for the given temperature. The only thing this does is when you're cooking burgers on the grill and your flame dies out, you take a look at the gauge and it confirms what you already knew, that you're out of gas. The only way to actually know how much you have left is using its weight, so like a fish scale that measures the weight of the cylinder. Just my 2 cents Smilie
This..
2
Apr 18, 2026 6:34 PM
331 Comments
Joined Sep 2022
AquaVolcano980Apr 18, 2026 6:34 PM
331 Comments
Quote from chapalappa :
I almost never comment, but I use this in my classroom as an example of products sold that aim to use lack of knowledge to spereate money from a consumer. The pressure inside a closed cylinder is consistent regardless of how much liquid refrigerant is inside of it. Whether you have 20 lb of liquid propane or 1 oz of liquid propane in the tank, your pressures remain constant for the given temperature. The only thing this does is when you're cooking burgers on the grill and your flame dies out, you take a look at the gauge and it confirms what you already knew, that you're out of gas. The only way to actually know how much you have left is using its weight, so like a fish scale that measures the weight of the cylinder. Just my 2 cents Smilie
I have a Flame King tank with the built-in gauge like this, and it corresponds fairly closely to the spring-loaded gauge built into my older Weber grill that is using weight as the measurement. However, when the tank gets below one-quarter, the dial gauge is much more accurate.
1
Apr 18, 2026 6:54 PM
1.6K Comments
Joined Jul 2007
xmenxmenxmenApr 18, 2026 6:54 PM
1.6K Comments
Quote from GoPadre :
Just pick up tank to gauge the weight - being doing that successfully for yearsAnd also, have a full backup tank on standby. The worst is grilling and tank runs out sans a back-up
This is also what been doing for ages. Also have a spare. Spare tank are also cheap on marketplace. If it ever expires, just get it swap at the grocery store for a few bucks for doing their exchange.
1
Apr 18, 2026 7:08 PM
723 Comments
Joined Oct 2015
DrSeussApr 18, 2026 7:08 PM
723 Comments
Once you know you're empty, Tractor Supply (and I think U-HAUL) can re-fill a typical size tank for about $16 as long as the tank is no more than a few years old.
1
1
Apr 18, 2026 7:13 PM
921 Comments
Joined Oct 2007
CowboyjloveApr 18, 2026 7:13 PM
921 Comments
Woot had these a while back for
Like 5.00.

Sign up for a Slickdeals account to remove this ad.

Apr 18, 2026 7:33 PM
352 Comments
Joined Mar 2005
CleofusApr 18, 2026 7:33 PM
352 Comments
I always make sure I have a full spare tank so, thanks anyhow!
1

Join The Conversation

Share your experience with the Slickdeals community

Share information with the community. Please follow our Community Guidelines and be kind!

Related Searches

AutosHome & Home ImprovementGardening & OutdoorGrills & Grilling AccessoriesTravel & VacationsRV & Camper Van RentalsAmazon