Christian Missions in Persia. Christianity was introduced in Persia in the Parthian period, and several bishoprics were established there (Latourette, II, pp. 263ff.).
You will likely pay more for the exchange, even if your tank is completely empty. An empty 20 lb tank will hold about 4.7 gallons of propane. That is $18.47 at $3.93 per gallon, which is the low quantity price (I just paid $3.44 per gallon when filling several tanks). The exchange is about the same price. Keep in mind this comparison is as if the exchange gives you a FULL tank.
I just paid $280.00 for 82 gallons of propane to fill my 100/120 gallon tank, delivered to my home (about 3 miles from the service center). That came to about $3.25 a gallon. This seemed extremely high to me. I will go through this âtank fullâ of gas by the first of the year if this very âcoolâ weather continues.