Final answer:
It is not an accepted practice to join PVC and ABS pipes using a multi-purpose glue. Different types of adhesives are required for each type of pipe.
Step-by-step explanation:
The statement that it is an accepted practice to join PVC and ABS pipes as long as you use a multi-purpose glue is False. PVC and ABS are two different types of plastic materials with different chemical compositions and properties. They require different types of adhesives for proper bonding.
PVC pipes are commonly joined using solvent cement, which contains a chemical solvent that softens the PVC surface, allowing it to fuse together with another PVC surface. On the other hand, ABS pipes are usually joined using ABS cement, which is specifically designed for bonding ABS plastic. Using the wrong adhesive can result in weak joints or no bonding at all.
Therefore, it is important to use the correct adhesive for joining PVC and ABS pipes to ensure a strong and reliable connection.