Same here. I've retired a can or two in the time I've had the heater. The o= nly times I've noticed them leaking is right after you remove an empty from= the heater and they are cold and the pressure is real low. They get really= cold when you run the heater on high, sometimes frost builds up on the can= s. Propane has low vapor pressure and maybe the valves depend on pressure t= o help stay closed. Bob ________________________________________ From: piclist-bounces@mit.edu on behalf of John G= ardner Sent: Monday, November 27, 2017 4:11 PM To: Microcontroller discussion list - Public. Subject: Re: [OT] Best garage heating option My experience is that the tank valve fails, eventually. On 11/27/17, Sean Breheny wrote: > Are the 16 oz tanks built with enough margin to handle the fatigue cycles > from emptying and re-filling? --=20 http://www.piclist.com/techref/piclist PIC/SX FAQ & list archive View/change your membership options at http://mailman.mit.edu/mailman/listinfo/piclist .