On a recent Friday I went into the main Buriram Fire Station and showed the staff two different fire extinguishers that needed to be recharged. They could not help me with the small size, but the 15 liter they quoted 500 baht. I said fine and I would come back the next Wednesday. On my return the price had risen to 600 baht, I was polite but they did not budge. Get the price in writing is my advise. The original purchase price of that extinguisher in Thailand is 1500 baht give or take, so you just give the Farang version of "Thai Smile" and no one loses face. Yes it was interesting to train the family and household staff on how to use a fire extinguisher. Water to stop any flare up on the BBQ, but for a LPG gas tank fire the Fire Extinguisher was a worth the baht. The family was a bit "casual" in their attitude when moving and connecting a cooking gas tank.