The type of plastic tubing that is often used in radiant floor heating systems is known as what? ABS ocevc OPEX OPVC

## Step 1<br />The problem is asking for the type of plastic tubing that is commonly used in radiant floor heating systems. Radiant floor heating is a system where warm water flows through tubing beneath the floor to provide heat. The tubing used in these systems must be durable, resistant to corrosion, and able to withstand high temperatures.<br /><br />## Step 2<br />ABS (Acrylonitrile Butadiene Styrene) is a type of plastic known for its strength and impact resistance. However, it is not typically used in radiant floor heating systems due to its lower temperature tolerance compared to other plastics.<br /><br />## Step 3<br />Ocevc is not a recognized type of plastic or material in the context of heating systems or plumbing.<br /><br />## Step 4<br />OPEX (Odorless Polyethylene) is a type of plastic tubing known for its durability, flexibility, and resistance to corrosion and high temperatures. It is commonly used in radiant floor heating systems because it meets all the necessary requirements for such applications.<br /><br />## Step 5<br />OPVC (Oxygen-Free Polyvinyl Chloride) is a type of PVC that is resistant to oxygen and moisture. However, it is not typically used in radiant floor heating systems due to its lower temperature tolerance compared to OPEX.<br /><br />Based on this analysis, the correct answer is OPEX, as it is the type of plastic tubing that is often used in radiant floor heating systems due to its suitable properties for this application.