Backflow Prevention Practice Exam

An appropriate purpose of a thrust block is to ____?

1. Adjust pressure changes

2. Maintain pipe joint integrity

3. Stop backflow

4. Support failing soil conditions

The correct answer is: Maintain pipe joint integrity

The appropriate purpose of a thrust block is to maintain pipe joint integrity. Thrust blocks are typically used in piping systems, especially in vertical and horizontal sections where there are changes in direction or elevation. When fluid moves through a pipe, especially under high pressure, the forces exerted can cause the joints to separate or fail if they are not properly supported. Thrust blocks help to absorb these forces and prevent movement at the joints, thus preserving the integrity of the entire system. By distributing the force exerted by the fluid over a wider area of soil, thrust blocks effectively minimize the risk of joint failure, ensuring a reliable and durable piping system. This understanding of thrust blocks is crucial, as ensuring pipe joint integrity is vital for the overall safety and functionality of backflow prevention systems.