Description：

With this adapter you can't overfill, the smaller bottle will just fit in the tank as it can hold, you can also backfill the larger tank if you get in a situation where your bigger tank is depleted .

Hook up a small cylinder with this adapter and it will equalize the pressure between the two tanks.
We have a safety feature compared to others. When the traffic is too high, we will automatically close at the end. This feature controls the flow of propane delivery and ensures that the tank never overflows. This protects you from dangerously overfilling your gas tank while they don't.

Notice:
To use an adapter, refill 1 lb from a 20-40 lb. cylinder tank
Important: Always start with an empty barrel.
Before backfilling, chill small empty 1-pound cylinders in the refrigerator (for optimal filling) for 15-20 minutes. Fill larger tanks at room temperature (no more than 85°F).

MOUNT TIPS:
Tank for attaching left-hand threaded lug adapters
Adapter's right-hand threaded cap attaches to a 1-pound cylinder (hand-tight)
Close 1 lb cylinder and tank upside down
Open the valve in the tank for a few minutes until you can no longer hear the propane transfer. Then, close the valve closed.
Return the 1 lb cylinder to the upright position.
Disconnect the small 1-pound cylinder in the first place.
Check 1 lb cylinder for leaks: Place a small amount of cylinder opening and safety valve with a half liquid soap, half water solution. If air bubbles appear, discard the jar in a safe area.

Include:
1 propane tank fill adapter