Your LPG storage tank should have a gauge that shows you how much fuel it has in it. Most LPG suppliers suggest that you arrange a fuel delivery when the level in your tank gets down to about 20%. Make regular checks, particularly in the winter when you will use more, so you know when levels are low.
Rushden
Rushden is definitely a town plus civil parish in the county of Northamptonshire, England.
The parish of Rushden covers an area of some 3,777 acres (15.28 km2), and is an area of the area of East Northamptonshire. The population of Rushden is 29,272 (Census 2011), which makes it the fifth largest town in the county. The Rushden-Higham urban area, which comes with the adjoining town of Higham Ferrers, posseses an approximated populace of 36,410.