anchor.diff:  
   /obj/machinery/portable_atmospherics/canister/tier_3
   	heat_limit = 1e12
  -	pressure_limit = 1e14
  +	pressure_limit = 9.2e13
   	volume = 5000
   	max_integrity = 500
   	can_max_release_pressure = (ONE_ATMOSPHERE * 30)
  
positive.code: 
  /obj/machinery/portable_atmospherics/canister/tier_1
  	heat_limit = 5000
  	pressure_limit = 50000
  	mode = CANISTER_TIER_1
  
  /obj/machinery/portable_atmospherics/canister/tier_2
  	heat_limit = 500000
  	pressure_limit = 5e6
  	volume = 3000
  	max_integrity = 300
  	can_max_release_pressure = (ONE_ATMOSPHERE * 30)
  
negative.code: /obj/machinery/portable_atmospherics/canister/examine(user)
  	. = ..()
  	if(mode)
  		. += "<span class='notice'>This canister is Tier [mode]. A sticker on its side says <b>MAX SAFE PRESSURE: [siunit_pressure(initial(pressure_limit), 0)]</b>.</span>"
  
  /obj/machinery/portable_atmospherics/canister/nitrogen
  	name = "Nitrogen canister"
  