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Flashcards in Basic Plumbing Deck (57)
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1

what are the 4 catagories of pipes and fittings

  • cast iron
  • galvanized metal 
  • copper
  • plastic

2

what is cast iron exclusively used for 

drainage systems

3

what should you do to a PVC pipe after cutting

de-burr the edges

4

what is the "Schedule" of pipe mean

schedule is the thickness

schedule 40 is thicker than 80

5

how much pressure should be in your water lines

42-46 psi

6

can PVC pipe be used for hot water lines

no, only for cold lines

CPVC can be used for hot

7

when priming how far out should the primer be from the joint

about 3/4"

8

what should you do before glueing all your pipes

dry fit everything to make sure everything is good, and make tick marks on all the joints to ensure proper re-alignment

9

what is CPVC

chlorinated polyvinyl chloride

10

what size pipes does CPVC come in 

3/8", 1/2", 3/4" and 1"

11

what is the best material for water supply pipes

copper because it has great water flow

12

how many wall thickness grades does copper have, and what are they

3

M: red lettering, thinnest and least expensive

L: blue lettering, required by code for commercial plumbing

K: has the heaviest walls and is mostly used for underground water service lines

13

what is Mapp gas

methylacetylene-propadine and liquefied petroleum gas

14

how hot can the flame get using Mapp gas 

5300 degrees

15

which can burn hotter propane or mapp gas

mapp gas

16

what is the purpose of flux

cleans away the oxidized coating on metal and allows the solder to bond

17

what must you do when adding copper to a galvanized pipe

include a dielectric union

18

what is PEX

polyethylene

19

what are some advantages to PEX

  • Easy to install
  • easy to transport
  • good insulation
  • quiet
  • good for retrofit jobs
  • freeze resistant

20

how far apart should the support braces be when using PEX

horizontaly every 32"

vertically every 10'

21

how long and how hot can you run hot water through PEX

210 degrees for 48 hours

ongoing use 180 degrees and up to 100 psi

22

what sizes does PEX come in

1/4", 1/2", 3/4" and 1"

23

what kind of piping do push on connectors work for

CPVC, copper and PEX

the white plastic sleeves must be removed when using copper

24

what is the DWV system

the drain, waste vent system

25

what are drain lines

carry water from sinks, shower and tubs

26

what are waste lines

carry waste from toilets

27

what do vent lines do

exhaust sewer gases and provide the air pressure to allow wastes to flow freely

28

what are the min code requirements for clearance around toilets

min 15" left and right and min 12" behind toilet

29

sewerage systems are usually made from pipe ranging in diameter from ___ to ___ inches

2 to 36

30

any drain line must have a ____ in drop per ____ 

1/4" drop per every 1' horizontally