Reference Guide to Aid in Inspecting Homes

Unique Serial Numbers

Bradford White Water Heaters:

A – 1984/2004                              L – 1994/2014

B – 1985/2005                             M – 1995/2015

C – 1986/2006                             N – 1996/2016

D – 1987/2007                             P – 1997/2017

E – 1988/2008                             S – 1998/2018

F – 1989/2009                             T – 1999/2019

G – 1990/2010                             W – 2000/2020

H – 1991/2011                             X – 2001/2021

J – 1992/2012                             Y – 2002/2022

K – 1993/2013                             Z – 2003/2023

York Air Conditioners & Furnaces:

A – 1971/1992                M – 1982/2003

B – 1972/1993                N – 1983/2004

C – 1973/1994                              P – 1984

D – 1974/1995                              R – 1985

E – 1975/1996                              S – 1986

F – 1976/1997                              T – 1987

G – 1977/1998                              V – 1988

H – 1978/1999                              W – 1989

J – 1979/2000                              X – 1990

K – 1980/2001                              Y – 1991

L – 1981/2002                 Ended in 2004

Trane Air Conditioners & Furnaces:

W – 1983                              H – 1993

X – 1984                              J – 1994

Y – 1985                              K – 1995

S – 1986                              L – 1996

B – 1987                              M – 1997

C – 1988                              N – 1998

D – 1989                              P – 1999

E – 1990                              R – 2000

F – 1991                              Z – 2001

G – 1992                              T – 2002

Electrical Section

GFCI Protection:
Exterior                                                        1973

Bathrooms                                                 1975

Garage                                                          1978

Replacing Ungrounded Outlets     1984

Jetted Tub                                                   1987

Kitchen (Within 6 Feet of Sink)      1987

Unfinished Basement                          1987

Crawlspace                                                1990

Kitchen (All Countertops)                1996

Dedicated Exceptions:
Refrigerator

Freezer

Microwave

Washing Machine

Other Electrical:

Bathroom Exhausts Vented to the Exterior     1987

Bedroom AFCI Breakers                                              1999

Dining/Living Room AFCI Breakers                       2008

Tamper-Resistant Outlets                                            2012

Dryer Vent Length:

25 Feet Maximum

-2.5 FeetPer 45 Degree Bend

-5 Feet Per 90 Degree Bend

Copper Wire Sizes & Amps

Single Strand Aluminum Wiring:

Maximum Number of Circuits in a Panel:

100 Amp                20 Circuits/Breakers

125 Amp                24 Circuits/Breakers

150 Amp                30 Circuits/Breakers

200 Amp                 40 Circuits/Breakers

Minimum Heights of Electrical Service Wiring:

Walkways                                    10 Feet

Driveways                                   12 Feet

Streets/Parking                         18 Feet

Flat Roof                                        10 Feet

Pitched Roof                              3 Feet

Pitched Roof Edge                          18 Inches

Smoke & Carbon Monoxide Detectors:

Bedroom Smoke Detectors                     1997

Carbon Monoxide Detectors                  2012

Knob & Tube Wiring:

Ungrounded Electrical System Used From the 1880s to the 1930s. Needs to Be Out in the Open to Dissipate Heat. If in the Attic it Can’t Be Covered With Insulation.

Plumbing Section

Clay Drain Piping
Cast Iron Drain Piping (1800s – 1970s)
Galvanized Steel Drain Piping (1800s – 1970s)
Copper Drain Piping
ABS Drain Piping
PVC Drain Piping
Drum Trap Drain
S Trap Drain
P Trap Drain
Galvanized Steel Water Supply Piping (1800s – 1970s)
Copper Water Supply Piping (1960s – Now)
PVC Water Supply Piping
CPVC Water Supply Piping
Polybutylene (PB) Water Supply Piping (1978 – 1998)
Polyethylene (PEX) Water Supply Piping (1990s – Now)
Flexible Braided Water Supply Piping
Black Iron Gas Piping
CSST Gas Piping

Decks & Stairways:

Roofing Identification

3 Tab Asphalt Shingle
30 Year Architectural Asphalt Shingle
40 Year Architectural Asphalt Shingle
Wood Shakes/Shingles
Concrete Tile
Concrete Tile
Roll Roofing
Rolled Silver
Tar & Gravel
Rubber Membrane
Metal Panels
Aluminum (Metal) Shingles

Insulation Identification

Vermiculite Asbestos (1920s-1970s)
Mineral/Rock Wool (1970s-1980s)
Cellulose (Shredded Paper)
Yellow Fiberglass
Pink Fiberglass
White Fiberglass

Asbestos-Containing Materials

Asbestos in Houses Was Used from the 1800s to the 1970s. The Following are Items in Which it was Used:

Exterior Siding
Flooring Tiles
Ceiling Tiles
Ceiling Texture
Duct Wrap
Duct Tape
 
Attic/Wall Insulation