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Plumbing > Basic Plumbing > Flashcards

Basic Plumbing Flashcards

1
Q

what are the 4 catagories of pipes and fittings

A
  • cast iron
  • galvanized metal
  • copper
  • plastic
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2
Q

what is cast iron exclusively used for

A

drainage systems

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3
Q

what should you do to a PVC pipe after cutting

A

de-burr the edges

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4
Q

what is the “Schedule” of pipe mean

A

schedule is the thickness

schedule 40 is thicker than 80

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5
Q

how much pressure should be in your water lines

A

42-46 psi

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6
Q

can PVC pipe be used for hot water lines

A

no, only for cold lines

CPVC can be used for hot

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7
Q

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

A

about 3/4”

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8
Q

what should you do before glueing all your pipes

A

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

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9
Q

what is CPVC

A

chlorinated polyvinyl chloride

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10
Q

what size pipes does CPVC come in

A

3/8”, 1/2”, 3/4” and 1”

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11
Q

what is the best material for water supply pipes

A

copper because it has great water flow

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12
Q

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

A

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

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13
Q

what is Mapp gas

A

methylacetylene-propadine and liquefied petroleum gas

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14
Q

how hot can the flame get using Mapp gas

A

5300 degrees

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15
Q

which can burn hotter propane or mapp gas

A

mapp gas

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16
Q

what is the purpose of flux

A

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

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17
Q

what must you do when adding copper to a galvanized pipe

A

include a dielectric union

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18
Q

what is PEX

A

polyethylene

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19
Q

what are some advantages to PEX

A
  • Easy to install
  • easy to transport
  • good insulation
  • quiet
  • good for retrofit jobs
  • freeze resistant
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20
Q

how far apart should the support braces be when using PEX

A

horizontaly every 32”

vertically every 10’

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21
Q

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

A

210 degrees for 48 hours

ongoing use 180 degrees and up to 100 psi

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22
Q

what sizes does PEX come in

A

1/4”, 1/2”, 3/4” and 1”

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23
Q

what kind of piping do push on connectors work for

A

CPVC, copper and PEX

the white plastic sleeves must be removed when using copper

24
Q

what is the DWV system

A

the drain, waste vent system

25
Q

what are drain lines

A

carry water from sinks, shower and tubs

26
Q

what are waste lines

A

carry waste from toilets

27
Q

what do vent lines do

A

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

28
Q

what are the min code requirements for clearance around toilets

A

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

29
Q

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

A

2 to 36

30
Q

any drain line must have a ____ in drop per ____

A

1/4” drop per every 1’ horizontally

31
Q

what is the min width of a vent pipe

A

1 1/4”

32
Q

the vent pipe should always be more than ___ the width of the drain pipe

A

half the width

33
Q

what is the min width piping for single and double toilet systems

A

single toilet 2” piping

double toilet 3” piping

34
Q

what are the types of venting

A

wet venting

auxillary venting

direct venting

35
Q

what is direct venting

A

if a fixture is within 5’ of a waste stack, a standard vent is not required as the stack itself acts as a vent

36
Q

what is a stack vent

A

the extension of the waste stack that potrudes from the roof to vent gases

37
Q

what is a drainage trap

A

a curved section of pipe that fills with water creating a seal against odors and gases

38
Q

what are the 4 types of faucets

A
  • compression
  • ball
  • cartridge
  • disk
39
Q

what is a septic system

A

an on site sewege managment system designed to safely treat and dispose of waste water

40
Q

the waste in a septic tank naturally seperates into what three layers

A

the top layer Scum

the middle layer waste water

the bottom layer sludge

41
Q

what is it that keep scum and sludge from leaving the septic tank

A

a baffle

42
Q

what comes from the septic tank to the leach field

A

a distribution box

43
Q

whats effluent

A

waste water that has been filtered and treated by the soil before it enters the water table

44
Q

what is the purpose of the drain/leach field

A

to deliver the effluent to the soil to be broken down

45
Q

what does the small amount of sludge left in the tank do

A

promotes bacterial growth

46
Q

what does bacterial growth do

A

breaks down solid waste

47
Q

how often should you pump your septic for a family of four

A

every 2 to 3 years

48
Q

what are three types of septic tanks

A

concrete

plastic

polyethlyene

49
Q

what must you do if installing a polyethylene tank

A

ensure it is secured to the ground to prevent floating

50
Q

how big must a tank be for a three bedroom house

A

1,000 gallons or more

51
Q

how big must a tank be for a four bedroom house

A

1250 gal or more

52
Q

how big must a tank be for a five bedroom house

A

1500 gals or more

53
Q

what is one of the most important factors to consider when determining the size of the vent line

A

determine the number of units that will be connected

54
Q

what is the ring that goes between the toilet and the floor flange that prevents water from leaking

A

wax ring

55
Q

what traps do you use for floor drains and wall drains

A

use a P trap for walls

use a S trap for floors

56
Q

if water is warm but not hot what heating element do you replace

A

top heating element

57
Q

if you get a small amount of very hot water but then cold what heater element do you replace

A

bottom element

Plumbing (1 decks)

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