When cooking on a gas grill, if the flame isn't as high as you think it should be, use the wooden end of a wire brush and tap the regulator, in case you have dirt or grease in the line. This may solve the problem of the low flame and keep you from having to purchase a new regulator.
I created this video blog on how to fix a BBQ grill. I found this grill on the side of the road and it looked nice enough to be fixed. I use it for camping now.