MEP 1 - Plumbing - Houston

DWV

Drain Waste Vent

SS

Sanitary Sewer

OSHA requires trenching protection at ___.

5 feet or greater

types of trenching protection:

- stepping/bencing

- trench box

- shoring

SS/SD materials:

- cast iron

- copper

- PVC

- ABS

What color is cast iron?

black

How is cast iron pipe joined.

hub and no-hub joints

Cast iron is ___.

non-combustible

Cast iron is the ___ option for indoor plumbing.

quietest

Copper piping can be joined by ___, ___, or ___.

soldering, threaded joints, or compression joints

PVC is a ___ ___.

white plastic

PVC can be joined by:

slip and threaded joints

Copper piping is ___ option for plumbing.

most expensive

PVC is ___ and ___.

combustible and noisy

ABS is ___ ___.

black plastic

ABS can be joined by ___ and ___.

slip and threaded joints

ABS is ___ and ____.

combustible and noisy

What is typically installed after the building sewer exits the footprint of the building?

double cleanout

What should be installed on SD pipes inside the building?

insulation

If water is flowing from a cow tongue:

check the roof, primary drainage is probably clogged

What is used to size drainage pipes?

DFU

What is the maximum gallons per flush for a toilet?

1.6 gpf

What is the minimum allowable vent pipe size?

1 1/4 inches

Every fixture must have a ___.

P-trap

What is the purpose of the vent pipe system?

to let air into the system

VTR

vent through roof

Plumbing drawings are found on the ___.

P sheets

Plumbing is Division ___.

22

The old plumbing division is ___.

15

MEP plans go out to ___ from the footprint of the building.

5 feet

After that ___ pick up the rest of the plumbing.

civil plans

invert elevation:

from the surface of the ground to the bottom interior of the pipe

Your ___ can't be bigger than your ___.

branches, main

DW

domestic water

CW

cold water

HW

hot water

SW

soft water

OSHA requires fall protection at ___.

6 feet

DW pipe materials:

- copper

- PEX

- galvanized steel

- CPVC

- PVC

PEX is a ___ plastic that is also ___.

combustible, flexible

PEX is good for ___ and ___.

CW and HW

wall thickness of PEX:

SDR9

wall thickness of copper:

K, L, M, DWV (thickest to thinnest)

Type K copper pipe is used ____.

under the slab

Galvanized steel is joined by ___.

threaded joints

Galvanized steel is ___ for HW/CW.

just ok

Galvanized steel is ___ prone.

corrosion

wall thickness of galvanized steel:

Schedule 40, Schedule 80

CPVC can be used for more ___ than PVC

extreme temperatures

wall thickness of CPVC:

Schedule 20, 40, 80, etc (CPVC)

bigger number =

thicker pipe

wall thickness of PVC:

Schedule 20, 40, 80 (PVC)

types of local water treatment:

- water softeners

- water filtration

water heater power:

-gas

-electric

water heater types:

- tank

- instantaneous

Natural gas pipe is ___.

yellow

FP

fire protection

___ is not always included in the contract drawings.

FP desing

Wet systems are used where there is ___.

HVAC

An outdoor FP system would use a ___.

dry system

explain the 12 in 12x8 tapping sleeve

12 = diameter of city main

explain the 8 in 12x8 tapping sleeve

8 = diameter of building supply

Fire protection is Division ___.

21

___ must be between water and sewer lines.

5 feet

If you smell gas, you need to ___.

clear

Don't ___ till you know its safe.

dig

Shut of ___ when working on it.

gas piping

Btu

British Thermal Unit

CFh

Cubic Feet per Hour

1 CFH =

1000 Btu/h

1 Therm =

100000 BTUH

1 PSI =

16 oz

1 PSI =

28 inches WC

WC

water column

higher pressure in NG lines =

smaller pipe

NG

natural gas

Flues must be ___ from the intake.

10 feet

Regulators ___ in an NG system

change pressure (usually decrease)

The IFGC has a minimum burial depth of ___ for NG.

12 inches

___ and ____ are allowed underground for NG

Plastic and steel

___ is NOT allowed for above ground NG piping.

Plastic

Outdoor NG pipe should be elevated ___.

3.5 inches

Natural gas testing:

- 1.5(working pressure) = no less than 3 psi

- withstand that pressure for 30 minutes for every 500 CF of pipe

After ___, NG pipe must be welded.

2 inches

___ can NOT be used for NG

PVC