No, once you pay the gas bill, you can use it immediately. Why should it expire?
Now the smart gas meter is to store cash for the purchase of gas, such as the remote APP to pay one hundred and two hundred gas fees, you can rest assured that the use, once the arrears, there will be a text message to remind you to pay. If you are still using a lot of gas when you are not paying your bills, the gas company may turn off your gas. But if you immediately make up the arrears, and then hand in the extra money, it will be opened for you immediately.
No, the gas fee is not due to say that after you pay the gas fee, you can directly insert the pull into the gas meter, you can also keep the card properly until the gas is used up or after it is used up, and then insert the gas meter, because after you buy it is your private property, gas and water will not expire, so you can rest assured that the purchase, even if you can not use it, you can refund the fee, so you can be more assured!
You pay the gas bill and you put the card in the gas meter
Pay the heating bill. The gas bill can't be due soon.