A propane buffer tank is a specialized cylinder designed for use with propane-powered floor care machines, including floor buffers, burnishers, and polishing machines commonly used in commercial cleaning and facilities maintenance. Flame King's 20 lb single-spud LP buffer tank includes a pre-installed propane vapor valve and a built-in level gauge so operators can monitor fuel during use. Unlike standard BBQ-style tanks, the single-spud vapor valve configuration matches the low-demand fuel delivery requirements of floor propane equipment.