Cross Connection Plumbing. James Peterson Plumbing Program Phone: (651) E mail:

Transcription

1 Cross Connection Plumbing James Peterson Plumbing Program Phone: (651) E mail: jim.peterson@state.mn.us

2 History Romans were first to use lead pipe to distribute water and remove waste water from buildings. 2

3 History Digging wells and cisterns to collect rainwater was the primary means of getting water throughout most settlements. Water was not a popular beverage during those days. A girl from Barbados boarding with her grandmother in 1714 while the eight year old attended school in Boston, complained to her father that grandmother was making her drink water. Dad wrote back and insisted that she get beer or wine as befitted her station. 3

4 History This distaste for water goes back to the medieval notion that water caused the chills and other sickness. The more likely reason was that the privy and the local well were too close together and spawned cholera and typhoid instead. 4

5 History Early water mains were made of bored out logs. Sags in the log allowed water to stagnate, become infested with insects, and generally leave a woody taste. 5

6 History An outbreak of amoebic dysentery in Chicago during the 1933 World's Fair was traced to faulty plumbing. Tragic results were 98 deaths and 1,409 official cases. 6

7 Minnesota Plumbing Code Minnesota Chapter 349, Laws of 1933, licensing of plumbers went into effect April 22, 1933, requiring plumbers in cities of more than 5,000 people be licensed. By October 1933 there were: 663 Master Plumbers 1037 Journeyman Plumbers 7

8 Minnesota Plumbing Code The Minnesota Plumbing code went into effect in July This code could be adopted by reference. Several hundred cities used this code. 8

9 Minnesota Plumbing Code 9

10 Minnesota Plumbing Code The code had been revised in 1939 and The 1969 code was mandatory and applied statewide. It has been revised many times since to update for new technologies. Backflow protection has followed. 10

11 Cross Connections 11

12 Back Siphonage Taken from images/backflow_anim_2.gif 12

13 Back Siphonage Taken from 13

14 Back Siphonage Taken from elcowater.org/backflow.html 14

15 Back Siphonage Protection Devices 15

16 Back Siphonage ASSE 1019 Atmospheric V B as part of the valve 16

17 Back Siphonage Atmospheric Vacuum Breaker(AVB) ASSE

18 Back Siphonage Shut off valves are not permitted downstream of an AVB. No more than 8 hours line pressure. 18

19 Back Siphonage Hose bib backflow 19

20 Back Siphonage 1052 not rated for back pressure No shut off downstream 20

21 Back Siphonage The ASSE 1052 is the ONLY approved screw on hose bib backflow preventer Back pressure not permitted Continuous line pressure NOT PERMITTED 21

22 Back Siphonage Hose bib with ASSE

23 Back Siphonage The ASSE 1011 for hose bibs are no longer approved. 23

24 Back Siphonage Pressure vacuum breakers Continuous line pressure permitted This is a testable device 24

25 Back Siphonage 25

26 Back Siphonage The PVB must be at least 12 inches above the highest sprinkler head 26

27 Yard Hydrants 27

28 Back Pressure 28

29 Back Pressure When the pressure in the plumbing system can rise above the pressure in the water supply 29

30 Back Pressure taken from Backflow_Events.ht 30

31 Back Pressure Double check valve with intermediate atmospheric vent (DCVIAV) For low level hazard (taste and odor) Back pressure permitted Line pressure permitted Not testable 31

32 Back Pressure Reduced pressure zone backflow preventer assembly (RPZ) For high level hazard Back pressure permitted Line pressure permitted Require testing and must be maintained 32

33 Back Pressure 33

34 Back Pressure This device is common to dairy operations. It in not listed as an approved back flow protection. 34

35 Device Testing 35

36 Device Testing 36

37 Device Testing 37

38 Device Testing 38

39 Device Testing A backflow prevention rebuilder certification allows the holder, who must also hold a current plumbing license, to perform the installation, maintenance, testing, repair, replacement or rebuilding of reduced pressure zone backflow prevention assemblies. Current ASSE 5130 and 5110 certification is required for this registration. A backflow prevention tester certification limits the holder to testing reduced pressure zone backflow prevention assemblies. A plumber license is not required to obtain a tester certification, though current ASSE 5110 certification is required. 39

40 Device Testing 40

41 Water Softeners 41

42 Drains Get the drains off the floor and out of the floor drains 42

43 43

44 Drains Remember the air gap 44

45 Not Yet No air gap Green hose is not approved for water distribution. 45

46 Close but no cigar Drain material must meet the requirements for water distribution. 46

47 Now that s better Proper air gap Material approved for water distribution. 47

48 Federal Safe Drinking Water Act (SDWA) regarding "lead free" plumbing Effective Jan. 4, 2014, the Reduction in Lead Drinking Water Act requires all drinking water system materials and products including plumbing pipes, fittings and fixtures introduced into commerce or for use must meet the new "lead free" definition. This definition has been revised from not more than 8 percent to mean "not more than a weighted average of 0.25% lead when used with respect to the wetted surfaces of pipes, pipe fittings, plumbing fittings and fixtures." 48

49 Federal Safe Drinking Water Act (SDWA) regarding "lead free" plumbing Could the product come in contact with drinking water? If NO then it does not have to meet the lead free requirements If YES then 49

50 Federal Safe Drinking Water Act (SDWA) regarding "lead free" plumbing Is the product a toilet, bidet, urinal, fill valve, shower valve, service saddle, or water distribution main gate valve larger than 2 inches? If YES then the product does not need to meet the lead free requirement. If NO then 50

51 Federal Safe Drinking Water Act (SDWA) regarding "lead free" plumbing Is the product used exclusively for nonpotable services or where the water is not anticipated to be used for human consumption? IF NO then: Product must meet the new lead free requirement If YES then: Product does not need to meet the lead free requirement 51

52 "There is no question that our health has improved spectacularly in the past century. One thing seems certain: it did not happen because of medicine, or medical science, or even the presence of doctors. " "Much of the credit should go to the plumbers and engineers of the western world. The contamination of drinking water by human feces was at one time the greatest cause of human disease and death for us...(but) when the plumbers and sanitary engineers had done their work in the construction of our cities, these diseases began to vanish. " Lewis Thomas (medical researcher and essayist, ) 52

53 Minnesota Department of Labor and Industry James Peterson Plumbing Program Phone: (651) E mail: jim.peterson@state.mn.us 53