Is your grill's propane tank no longer refillable, or outright broken? Most tanks last about seven years and can be refilled over that period of time. But when it's time to replace it, keep in mind that most trash haulers don't accept the 20-pound tanks. The good news: They are recyclable. Most household hazardous waste (HHW) collection sites (or special dates in your community when HHW is collected) will accept them for proper disposal. Also, major propane tank brands, like AmericaGas and Blue Rhino, accept them for recycling, and your local retailer may also take them back, too.