Shop around - Go to Menards.
You should be able to get a 12-3 extension cord for less than $1/foot. Then just cut the ends off and install a 20 amp plug.
Originally Posted by Ecnerwal
What does the primary pressure gauge on the tank tell us? That's right, the temperature. Put it on a scale if you want to know how much is in it...
Put some duct tape over the gauge - Or better yet - Replace the high pressure gauge with a plug - High pressure gauges are useless!