21. The British plumbing system is actually very cleverly thought out. 22. The discharge water must be purged outside the house, not through the plumbing system . 23. The University's plumbing system contains pipes for maintaining slood differential. 24. Officials blamed the failure of the project on incompatibility with the building's existing plumbing systems . 25. The straight sections of plumbing systems are called " pipes " or " tubes ". 26. Granite Systems will focus on computer networking _ the plumbing system that links computers together. 27. The Stooges manage to destroy the entire plumbing system in the home in grand fashion. 28. Water tanks on the roof provided the necessary water pressure for the building's plumbing system . 29. All the squatters were evicted, rubbish cleaned up, and a centralized plumbing system was begun. 30. In 2006, the electrical and plumbing systems were upgraded.
