Water Heater TPRV

How about a WH in an area inside the house (laundry room) where you cannot get the overflow line to the outside (without major remodeling) and it is on a slab foundation. Is there a way to make it safe and not cost a fortune?
I am also concerned that there is no outside source of combustion air in this laundry room/area

Install a Watts-210 valve on the water heater and a pressure relief valve on an exterior water line