It’s likely that over-tightened regulators happen because users experience false leaks using the Snoop (surfactant) test.
Here is guidance for using Snoop properly:
- If you are using the Snoop bottle to detect gas leaks, you need to have the proper amount of liquid in the bottle. If you have too little liquid in the bottle, or the bottom of the Snoop dispenser tubing is not completely submerged in the Snoop liquid (similar to red arrow, above), you can introduce air bubbles into the tubing. Bubbles introduced for these reasons can cause a user to incorrectly decide that there is a leak in the connection between the regulator and the tank. The proper amount of liquid is at least 1 inch from the bottom of the bottle with the tubing completely covered by the liquid in the bottle.
- Gently apply a small stream of the Snoop liquid around the connection between the regulator and the gas cylinder and look for air bubbles to form around the connection. If air bubbles form, wipe them away with a paper towel and reapply the Snoop, to double-check the test results.
- If you confirm that bubbles are being caused by the connection, then attempt to slightly tighten the nut and repeat the test with Snoop. Teflon tape can be used to reinforce the seal between the tank and the regulator. Teflon tape is applied to the threads of the regulator to achieve a more secure fit between the nut and the tank threads. Diane keeps rolls of Teflon tape in her desk for these occasions and can demonstrate its proper use if needed.
Here is a useful YouTube demonstration using liquid Snoop for finding gas leaks.
Here is a great video from Harris that describes how to change a gas cylinder.