Rheem Gas Hot Water Supply Heaters warranty Specifications and Dimensions, Model Number Style

SPECIFICATIONS AND DIMENSIONS

MODEL NUMBER

STYLE

MBTUH NATURAL GAS (X 1000)

DIMENSIONS (INCHES)

SHIPPING WEIGHT††

Ref.

With-

Height

Jacket

Gas

Flue

to

out

With

In-

Out-

(indoor)

(outdoor)

Width

Overall

Height

Conn.

Dia.

Dwg.

Pump

Pump

door

door

Input

Output

Input

Output

A

B

C

G

J

K

L

M

N

(Indoor)

(Outdoor)

1

GBB136*

GBBP136*

•

•

136.0

112.0

136.0

112.0

241⁄8

45.0

301⁄8

1⁄2

–

6

91⁄4

101⁄4

31⁄2

195

195

GBC186**

GBCP186**

•

•

181.0

148.0

181.0

148.0

181⁄4

40.0

38

3⁄4

121⁄16

6

–

–

–

191

200

2

GBC264**

GBCP264**

•

•

264.0

216.0

264.0

216.0

223⁄8

40.0

38

3⁄4

111⁄8

7

–

–

–

214

220

GBC331**

GBCP331**

•

•

334.0

274.0

334.0

274.0

253⁄4

40.0

38

3⁄4

103⁄4

8

–

–

–

234

240

GBC399**

GBCP399**

•

•

399.0

327.0

399.0

327.0

291⁄4

40.0

38

3⁄4

121⁄2

9

–

–

–

253

260

GBC512

GBCP512

•

•

511.5

419.4

511.5

419.4

323⁄4

57.0

33

1

–

10

253⁄8

–

–

510

535

3

GBC627

GBCP627

•

•

627.0

514.1

627.0

514.1

371⁄2

57.0

33

1

–

12

291⁄2

–

–

520

545

GBC726

GBCP726

•

•

726.0

595.4

726.0

595.4

415⁄8

57.0

33

1

–

12

341⁄4

–

–

630

685

GBC825

GBCP825

•

•

825.0

676.5

825.0

676.5

453⁄4

57.0

33

1

–

14

381⁄2

–

–

660

720

GBC926

GBCP926

–

•

–

–

926.0

759.3

523⁄8

–

–

1

–

–

–

–

–

–

790

GBC962

GBCP962

•

–

961.7

788.6

–

–

523⁄8

683⁄4

331⁄2

1

18

14

28

–

–

760

–

GBC1083

GBCP1083

–

•

–

–

1083.0

888.1

591⁄4

–

–

1

–

–

–

–

–

–

850

GBC1125

GBCP1125

•

–

1124.7

922.2

–

–

591⁄4

741⁄2

331⁄2

1

255⁄8

16

32

–

–

800

–

GBC1178

GBCP1178

–

•

–

–

1178.0

966.0

635⁄8

–

–

1

–

–

–

–

–

–

910

GBC1223

GBCP1223

•

–

1222.5

1002.4

–

–

635⁄8

741⁄2

331⁄2

1

235⁄8

16

32

–

–

860

–

4

GBC1287

GBCP1287

–

•

–

–

1287.0

1055.3

685⁄8

–

–

11⁄4

–

–

–

–

–

–

975

GBC1337

GBCP1337

•

–

1336.6

1096.0

–

–

685⁄8

761⁄2

331⁄2

11⁄4

235⁄8

18

36

–

–

930

–

GBC1413

GBCP1413

–

•

–

–

1413.0

1158.7

747⁄8

–

–

11⁄4

–

–

–

–

–

–

1065

GBC1467

GBCP1467

•

–

1467.0

1202.9

–

–

747⁄8

761⁄2

331⁄2

11⁄4

235⁄8

18

36

–

–

1000

–

GBC1570

GBCP1570

–

•

–

–

1570.0

1287.4

811⁄8

–

–

11⁄4

–

–

–

–

–

–

1120

GBC1630

GBCP1630

•

–

1630.0

1336.5

–

–

811⁄8

791⁄2

361⁄2

11⁄4

235⁄8

18

36

–

–

1040

–

GBC1758

GBCP1758

–

•

–

–

1758.0

1441.6

893⁄8

–

–

11⁄4

–

–

–

–

–

–

1150

GBC1826

GBCP1826

•

–

1825.6

1496.9

–

–

893⁄8

811⁄2

361⁄2

11⁄4

235⁄8

20

40

–

–

1090

–

*Equipped with bronze headers, all other models have glasslined cast iron headers. GBC – cast iron headers. GBB – bronze headers. †† Subtract 55 lbs. when ordering GBC models.

**Low NOx models add “N” after model number. Outdoor models add “-O” after model number. Indicate Natural or LP when ordering.

	MBTUH PROPANE GAS†
Model
Size		Multiplier
136-399		Same as natural gas
512-825		.94
926-1826		.92 Indoor
		.955 Outdoor (input)
		.92 Outdoor (output)

† Multiplier x Nat. MBTUH = Pro. MBTUH

MIN. CLEARANCES TO COMBUSTIBLE SURF.

Model		Left	Right	Top
Size	Rear	Side	Side	Indoor	Outdoor
136	12"	12"	6"	42"	Unobstr.
186-399	12"	12"	12"	39"	Unobstr.
512-825	12"	18"	6"	36"	Unobstr.
926-1826	24"	24"	24"	24"	Unobstr.

For servicing provide 24" minimum unobstructed clearance in front of unit.

	ELECTRICAL RATINGS
Model
Size	With Pump
136-399	3.7 amps @ 120V (1/8 hp pump)
331-399	3.6 amps @ 120V (1/6 hp pump)
512-1826	7.2 amps @ 120V (1/2 hp pump)

141/2

A

K

71/4

K

L

101/2

PUMP

INDOOR

OUTDOOR

(OPTIONAL)

PUMP COVER

UP FRONT

(OPTIONAL

11/4

INLET

OUTDOOR

J

CONTROLS

MODELS ONLY)

B

OUTLET

68-3/4

ELEC.

INDOOR

381/2

CONN.

DRAFT

OUTLET

G

(B)

(C)

9-7/8

STACKLESS

INLET

C

GAS

OUTDOOR TOP

241/4

1-1/2 NPT

26-1/2

10-1/4

REAR VIEW

153/8

FRONT VIEW

WATER

CONNECTION

2

COMBUSTIBLE

8-1/2

3/4 NPT

13-1/4

3-7/8

A

4 7/8

31/4

26-1/2

GAS

GAS

21-1/4

2

FLOOR SHIELD

ELECTRIC

4 3/4

CONNECTION

CONNECTION

OPTIONAL

CONNECTION

DRAWING 1

ON INDOOR

DRAWING 2

291/2

A

A

18

321/2

A

18

K

K

A

2

2

143/4

111/4

L

18

INDOOR OUTDOOR

2

J

21/2

INDOOR

OUTDOOR

B

B

441/8

OUTLET INLET

G

C

GAS

463/4

1

141/2

OUTLET

INLET

28

/4

1

ELEC

C

G

14

/2

17

273/4

GAS

ELEC

CONN

CONN

14

113/4

6

COMBUSTIBLE

1

/8

21/4

FLOOR SHIELD

21/4

21/2

1

8

51/8

1

COMBUSTIBLE

5/8

11

OPTIONAL

5

6

1 /8

FLOOR SHIELD

5

11 /

OPTIONAL

ON INDOOR

ON INDOOR

DRAWING 3

DRAWING 4