How do you handle situations where drain repairs require coordination with other trades or contractors?

Are you familiar with using air pressure testing or vacuum testing for drain system evaluation?

Can you explain your approach to preventative maintenance for drain systems?

How do you handle situations where drain repairs need to be performed during operating hours of a business or facility?

Have you ever been involved in designing or constructing drain systems from scratch? If so, what was your role?

Can you describe a time when you had to work on a drain system with limited access or space for repairs?

How do you handle situations where drain repairs require temporarily shutting off water supply to a building or area?

Are you familiar with using drain lining or pipe bursting techniques for drain repairs? If so, can you explain the process?

Can you explain your experience with using smoke testing or dye testing to identify drain system defects?

How do you ensure that the repairs you perform are long-lasting and durable?