Multi-section homes with plumbing in more than one section require drainage system crossover connections to join all sections of the home.The crossover design requirements are located in, and must be designed in accordance with part 3280.610.
If portions of the drainage system were shipped loose because they were necessary to join all sections of the home and designed to be located underneath the home, they must be installed and supported in accordance with 3280.608.
Drains must be completed in accordance with 3280.610:
The drainage system must be inspected and tested for leaks after completion at the site.The installation instructions must provide testing requirements that are consistent with 3280.612.
Figure to Subchapter G, Section IV - Drainage Systems
Drain Pipe Slope and Connections
02- 385 C.M.R. ch. 890, § G-IV