21. CPVC pipe can be used on?
22. Type M copper tubing can be used on?
23. Can aluminum pipe be used on water systems?
24. Can black Iron pipe be used on water systems?
25. Do hose bibs require a vacuum breaker?
26. A boiler drain does not require a?
27. What type of piping is prohibited from above ground applications?
28. What is the minimum slope of 3” drainage pipe?
29. What is the minimum slope of 2.5” drainage pipe?
30. Building sewers smaller than 8” diameter shall have cleanouts located at intervals of not more than?