No, plastic pipe fittings should not be used in fire-resistant systems as they have low resistance to heat and can melt or contribute to the spread of fire.
No, plastic pipe fittings cannot be used in fire-resistant systems as they have a low resistance to heat and can melt or release toxic fumes during a fire.
No, plastic pipe fittings should not be used in fire-resistant systems as they have a lower resistance to heat and fire compared to other materials such as metal or fire-resistant plastics.