Propane tanks can be returned or exchanged at the Nans Mobil in Fairfax (1301 Main St, Fairfax, VT 05454; 802-849-6161),  or the Beverage Mart in St. Albans (211 Lake Street, St. Albans, VT 05478; 802-527-7437). Small propane (1 lbs) can be brought to Aubuchon Hardware in Swanton (145 1st St, Swanton, VT 05488; 802-868-7884).