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Directory: Catalog > Water
Heaters > A.O. Smith > Parts
Parts List: A.O. Smith LB-1000, Series 920/951
- Use the chart to find the part you need to order. A diagram of the unit is below the chart to assist you in locating your part.
- Click on the underlined link to go directly to the part's page for pricing and ordering.
- For parts that are not underlined and do not have a link, please Contact Us for price and availability.
- The manufacturer has changed some part numbers to a new part number, and we have referenced the new part number in the chart (if applicable). Please note that the manufacturer may change part numbers and availability at any time.
- You can download and print the original PDF of the A.O. Smith parts list at the bottom of the page.
By-Pass Kit Parts List:
| Item |
Description |
LW/LB-1000
Series 920/951 |
| 1 |
Ball Valve |
191935 |
| 2* |
Control, Tank Temperature LW Models |
99058-1 (new # 9005925205) |
| 3 |
Hex Reducing Bushing (for use with relief valve) - LW models |
91940-1 (new # 091940-001) |
| 3 |
Hex Reducing Bushing (for use with relief valve) - LB models |
91940-8 |
| 4* |
Orifice, Gas Assembly - See Orifice Table |
|
| 5 |
Relief Valve - LW models |
98883-3 (new # 098883-003) |
| 5 |
Relief Valve - LB models |
98883-2 (new # 210451-002) |
| 6* |
Strap, Cable |
99592-2 |
| 7 |
Tee, Condensate |
192040-1 (new # 192040-001) |
| 8 |
Tee (for use with relief valve) - LW models |
78685-2 |
| 8 |
Tee (for use with relief valve) - LB models |
78685-5 |
| 9 |
Tee, 2 in. |
191584 (new # 191584-000) |
| 10 |
Tee, 2 in. x 2 in. x 3/4 in. |
78685-4 (new # 078685-004) |
| 11 |
Valve, Drain |
23273 |
| 12 |
Valve, Manual Shutoff |
3423-3 (new # 211694-000) |
| 13 |
Vent Patch Assembly |
192161 (new # 9005283205) |
NOTES:
- The manufacturer may change part numbers and availability at any time.
* Not Illustrated
** On LB models the circulating pump must be installed between the boiler inlet and the bypass. LW models have pump mounted inside jacket.
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Parts List A:
| Item |
Description |
LW/LB-1000 |
| 1 |
Bracket, Cover |
191602 |
| 2 |
Burner and Cone Assembly |
191850-2 (new # 9007222005) |
| 3 |
Bushing, Temp. Sensing |
191908 |
| 4 |
Combustion Chamber Assembly |
192129 (new # 9005813205) |
| 5 |
Connector, Hose |
191765 (new # 191765-000) |
| 6 |
Control, Dual Limit (for LB) |
191671 (no longer available) |
| 7 |
Control, Dual Limit for (LW) |
191671-1 (no longer available) |
| 8 |
Coupling, Flexible with Gasket |
191780-1 |
| 9 |
Cover |
192155 |
| 10 |
Gasket, Outer |
191563-1 (new # 9005679205) |
| 11 |
Gasket, Plate Assembly |
191564-1 |
| 12 |
Gasket, Inner |
191563 (new # 9005679205) |
| 13 |
Housing Assembly |
191627-4 (new # 9005369205) |
| 14 |
Igniter |
192334 (new # 9006101205) |
| 15 |
Insulation, Burner |
191618 (new # 191618-000) |
| 16 |
Nut, Manifold |
191555-1 |
| 17 |
O-Ring |
191556-2 (new # 191556-002) |
| 18 |
Power Supply, Temperature Indicator |
191905 (new # 9005996105) |
| 19 |
Screw, Maching #8-32 SST |
191770 (new # 191770-000) |
| 20 |
Sealer, Silicone |
191482-1 (new # 191482-001) |
| 21 |
Sensor, Temperature with Temperature Indicator |
191910 (new # 9005997105) |
| 22 |
Spacer, Ring |
191554-1 (new # 191554-001) |
| 23 |
Switch, Safety Flow |
78168 (new # 9005680205) |
| 24 |
Tee Assembly |
192387 (new # 9006117205) |
| 25 |
Tube Assembly, Primary - LW models |
192388 (new # 9005137205) |
| 25 |
Tube Assembly, Primary - LB models |
192225 (new # 9005135205) |
| 26 |
Tube Assembly, Outlet |
192224 (new # 192224-000) |
| 27 |
Tube Assembly, Secondary |
192386 (new # 9006118205) |
| 28 |
Washer, Flat #8 SST |
191768 (new # 191768-000) |
| 29 |
Well, Temperature Sensor |
191907 (new # 191907-000) |
| 30 |
Restrictor Air, Top Cover |
191926-1 (new # 9005809215) |
NOTES:
- The manufacturer may change part numbers and availability at any time. |
Parts List B:
| Item |
Description |
LB/LW-1000 |
| 1 |
Block, Terminal (4 Required) |
98205 (new # 098205-000) |
| 2 |
Bolt, Machine 5/16 in. - 18 |
191358-1 |
| 3 |
Box 4 in. x 4 in. Junction |
93558-4 (new # 9005076205) |
| 4 |
Bracket Assembly, Front |
192167 |
| 5 |
Bracket, Dia-Scan |
191756 |
| 6 |
Cover, Top |
191609-1 (new # 9005125205) |
| 7 |
Dia-Scan Assembly |
191815 |
| 8 |
Fastener |
191813 |
| 9 |
Frame Assembly |
182127 |
| 10 |
Handle, Lower Front Panel |
191802 (new # 191802-000) |
| 11 |
Indicator, Temperature |
191910 (new # 9005997105) |
| 12 |
|
|
| 13 |
Nut, Hex #8-32 |
41284-1 (new # 041284-001) |
| 14 |
Nut, Hex 5/16 in. - 18 |
097896 |
| 15 |
Overlay, On/Off |
191799 |
| 16 |
Panel, Left Side |
192187 |
| 17 |
Panel, Lower Front |
191805-1 |
| 18 |
Panel, Rear |
192191 (new # 9005134205) |
| 19 |
Panel, Right Side |
192186 |
| 20 |
Panel, Upper Front |
191806-1 |
| 21 |
Plate, On/Off |
191800 |
| 22 |
Power Supply, Temperature Indicator |
191905 (new # 9005996105) |
| 23 |
Retainer, Wire |
39884 |
| 24 |
Screw, Flat Head # 4 |
191906 |
| 25 |
Screw #10, Ground |
39885-1 |
| 26 |
Screw, Thread Cut #8 x 5/8 in. |
20107-3 (no longer available) |
| 27 |
Switch, Rocker |
191665 (new # 9004484215) |
| 28 |
Transformer, 50VA |
192337 (new # 190021-000) |
| 29 |
Trim |
191810 |
| 30 |
Washer, Lock #10 |
191771-1 |
| 31 |
Washer, Lock #8 |
3347-1 |
| 32 |
Washer, Flat 5/16 in. |
191359 |
NOTES:
- The manufacturer may change part numbers and availability at any time. |
Parts List C:
| Item |
Description |
LW/LB-1000 |
| 1 |
Clamp, Hose (Large) |
191794-1 (new # 191794-001) |
| 2 |
Clamp, Hose (Small) |
191794 (new # 191794-000) |
| 3 |
Connector, Female Bulkhead |
191744 (new # 191744-000) |
| 4 |
Connector, Port |
191745 (new # 191745-000) |
| 5 |
Drain, Flange |
191620 (no longer available) |
| 6 |
Drain, Flange Assembly |
191625 |
| 7 |
Elbow |
191664 (new # 191664-000) |
| 8 |
Gasket, Blocked Flue |
191767 (new # 191767-000) |
| 9 |
Gasket, Drain |
191622 |
| 10 |
Gasket, Vent |
191683-1 (no longer available) |
| 11 |
Nipple |
20373-18 (no longer available) |
| 12 |
Nut, Hex 1/4 in. |
170272 (new # 170272-000) |
| 13 |
Nut, Hex 1/4 in. Stainless |
191769 (new # 191769-000) |
| 14 |
O-Ring |
191556-1 (new #191556-001) |
| 15 |
Plate, Drain Seal |
191626 (new # 191626-000) |
| 16 |
Pump Assembly, Circulator - LW models |
192203 (new # 211538-000) |
| 17 |
Tube Assembly, Inlet |
192308 (no longer available) |
| 18 |
Tube Assembly, Primary - LB models |
192225 (new # 9005135205) |
| 19 |
Tube Assembly, Primary - LW models |
192388 (new # 9005137205) |
| 20 |
Tubing, Condensate |
191746 (new # 9004490215) |
| 21 |
Tubing, Pressure |
191562 (new # 191556-002) |
| 22 |
U-Bolt Assembly |
191938 |
| 23 |
Valve, Drain |
26273 (no longer available) |
| 24 |
Vent, Assembly |
191687-1 (new # 191687-001) |
| 25 |
Vent, Flange |
191685-2 (new # 191685-002) |
| 26 |
Vent, Flange Assembly |
191686-1 (No Longer Available) |
| 27 |
Washer, Lock 1/4 in. Stainless |
191771 (new # 191771-000) |
| 28 |
Washer, Flat |
191766 |
| 29 |
Washer, Lock 1/4 in. |
1006 (new # 001006-000) |
| 30 |
Bracket, Vent Support |
192194 (no longer available) |
| 31 |
Vent, Restricting Ring (Series 951, Propane) |
191923-1 (no longer available) |
NOTES:
- The manufacturer may change part numbers and availability at any time. |
Parts List D:
| Item |
Description |
LB/LW-1000 |
| 1 |
Blower |
192195 (new # 9005372205) |
| 2 |
Blower Adapter Assembly |
192215-1 (new # 192215-001) |
| 3 |
Blower, Manifold Assembly |
192217 |
| 4 |
Bracket, Blower |
192223 |
| 5 |
Clamp, Hose |
191794 (new # 191794-000) |
| 6 |
Elbow, 1-1/4 in. |
192216 |
| 7 |
Elbow, Union 1-1/4 in. |
86506-1 |
| 8 |
Flange, Observation Port |
191573 (new # 191573-000) |
| 9 |
Gasket, Blower Air Inlet |
192213 |
| 10 |
Gasket, Burner |
191564 (new # 191564-000) |
| 11 |
Gasket, Manifold |
191565 (no longer available) |
| 12 |
Gasket, Port (1/8 in. Thick) |
191576-1 |
| 13 |
Gasket, Port (1/16 in. Thick) |
191576 (new # 191576-000) |
| 14 |
Manifold Assembly |
192309 |
| 15 |
Nipple, Close 1/8 in. |
191147-1 (new part # 191147-001) |
| 16 |
Nipple, Close Stainless |
191772-1 |
| 17 |
Nipple, Tapped |
86505-26 |
| 18 |
Nipple, 1-1/4 in. x 38-1/2 in. |
86505-28 |
| 19 |
Nipple, 1-1/4 in. x 28-3/4 in. |
86505-27 |
| 20 |
Nipple, 1-1/4 in. x 2 in. |
86505 (new # 086505-000) |
| 21 |
Nipple, 1-1/4 in. x 3 in. |
86505-2 (new # 086505-002) |
| 22 |
Nipple, 1-1/4 in. x 4 in. |
86505-6 |
| 23 |
Nut, Hex 1/4 in. |
170272 (new # 170272-000) |
| 24 |
Orifice, Air (Series 920 - Natural Gas) |
192270-1 |
| 24 |
Orifice, Air (Series 951 - Propane) |
192270-3 |
| 25 |
Orifice, Union - See Orifice Table |
|
| 26 |
Plug, 1/8 in. Pipe |
3348 (new # 003348-000) |
| 27 |
Port, Observation Lower |
191572 (new # 191572-000) |
| 28 |
Port, Observation Upper |
191572-1 (new # 191572-001) |
| 29 |
Screen, Air Inlet |
192220-1 (new # 192220-001) |
| 30 |
Screw, Cap 1/4 in. |
190960-2 |
| 31 |
Screw, Flathead #8-32 x 1/2 in. |
191542 |
| 32 |
Screw, Flathead #8-32 x 3/4 in. |
191542-1 |
| 33 |
Switch, Low Gas Pressure |
191149-1 (new # 9003301205) |
| 34 |
Switch, Restricted Gas Flow |
191076 |
| 35 |
Tee, 1/8 in. |
40119 (new # 040119-000) |
| 36 |
Tee, Union |
191633 (new # 191633-000) |
| 37 |
Tubing, Pressure |
191562 (new # 191556-002) |
| 38 |
Tubing, Top Cover Assembly |
191925 |
| 39 |
U-Bolt Assembly |
191938-3 |
| 40 |
Valve, Main Gas |
078481-3 |
| 41 |
Valve, Manual Shutoff |
3423-3 (new # 211694-000) |
| 42 |
Valve, Solenoid Gas |
192189 (new # 192189-000) |
| 43 |
Washer, Lock 1/4 in. |
1006 (new # 001006-000) |
NOTES:
- The manufacturer may change part numbers and availability at any time. |
Parts List E (LW/LB-1000 Series 951 Propane):
| Item |
Description |
LB/LW-1000 |
| 1 |
Valve, Main Gas, Propane (951 Series) |
077780-0 |
| 2 |
Regulator, Propane (951 Series) |
192460 |
| 3 |
Valve, Manual Shut-Off |
3423-3 (new # 211694-000) |
| 4 |
Switch, Restricted Flow |
191076 |
| 5 |
Switch, Low Pressure |
191149-3 (new # 9003301205) |
| 6 |
Nipple, 1-1/4 in. |
86505-13 |
| 7 |
Nipple, 1-1/4 in. |
86505-2 (new # 086505-002) |
| 8 |
Nipple, 1-1/4 in. |
86505-10 |
| 9 |
Elbow, Union 1-1/4 in. |
86506 (new # 086506-000) |
| 10 |
Elbow, 90° 1-1/4 in. |
94516 (new # 094516-000) |
| 11 |
Elbow, 90° Street 1-1/4 in. |
192216 |
| 12 |
Nipple, 1-1/4 in. |
86505-32 |
| 13 |
Nipple, 1-1/4 in. |
86505-6 |
| 14 |
Nipple, 1-1/4 in. |
86505-4 |
| 15 |
Tee, 1/8 in. NPT Branch |
192465 |
| 16 |
Connector, Angle 1/8 in. |
1578 (new # 001578-000) |
| 17 |
Bleeder, Tube |
210016 |
| 18 |
Bleeder, Tube |
192461 |
NOTES:
- The manufacturer may change part numbers and availability at any time. |
Parts List F:
| Item |
Description |
LB/LW-1000 |
| 1 |
Bushing, Snap (Large 1-1/8 in. Hole) |
191078 |
| 2 |
Bushing, Snap (Small, 7/ 8 in. Hole) |
98863 (new # 098863-000) |
| 3 |
Cabinet with Cover |
191561 (new # 191561-000) |
| 4 |
Control, Hot Surface Ignition |
191848 (new # 9004492005) |
| 5 |
Fuse, 1/4 Amp |
191842-2 (new # 191842-002) |
| 6 |
Fuse, 2 Amp |
191842 (new # 191842-000) |
| 7 |
Fuse, 10 Amp |
191842-1 (new # 191842-001) |
| 8 |
Holder, Fuse |
191843 (new part # 191843-000) |
| 9 |
Module, Interface Assembly |
191757 (new # 9007119005) |
| 10 |
Nut, Hex #10 |
7207 |
| 11 |
Panel Assembly |
191678 |
| 12 |
Relay, S.P.D.T. (120 Vac) |
191661 (new # 9004481215) |
| 13 |
Relay, S.P.D.T. (24 Vac) |
191662 (new # 9004482215) |
| 14 |
Realy, D.P.S.T. (120 Vac) |
191880 (new # 191880-000) |
| 15 |
Screw, Thread Cut #8 x 3/8 in. |
20107 |
| 16 |
Screw, Thread Cut #8 x 5/8 in. |
20107-3 (no longer available) |
| 17 |
Spacer, Unified |
191946 |
| 18 |
Strip, Terminal |
191656 (new # 191656-000) |
| 19 |
Switch, Blocked Flue |
191667 (new # 9005686205) |
| 20 |
Switch, Blower Prover Switch |
191666 (new # 9005913205) |
| 21 |
Tap Cap Terminal |
170053 (new # 170053-000) |
| 22 |
Tubing, Pressure |
191562 (new # 191556-002) |
| 23 |
Washer, Lock #10 |
3347 |
NOTES:
- The manufacturer may change part numbers and availability at any time. |
Orifice Table:
| Model |
Natural Gas |
Propane |
Size (in.) |
Elevation (ft.) |
| LW/LB-1000 |
*192222-0 |
|
0.555 |
0-2000 |
| LW/LB-1000 |
192222-1 |
|
0.537 |
2001-3000 |
| LW/LB-1000 |
192222-2 (new # 192222-002) |
|
0.533 |
3001-4000 |
| |
|
|
|
|
| LW/LB-1000 |
|
*192739-0 |
0.333 |
0-2000 |
| LW/LB-1000 |
|
192739-1 |
0.329 |
2001-3000 |
| LW/LB-1000 |
|
192739-2 |
0.325 |
3001-4000 |
| * Factory-installed orifice. |
Wire, Solid Colors:
| Item |
Gauge |
Part # |
| White |
18 |
170595 170595-000: Wire - White #18 GA. Stranded |
| Black |
18 |
170596 170596-000: Wire Black #18 Stranded |
| Brown |
18 |
170890 170890-000: Wire Assembly (new part # 9004523215) |
| Yellow |
18 |
170604 |
| Red |
18 |
170603 170603-000: Wire Red #18 Stranded |
| Green |
14 |
041972 041972-000: Wire #14 Green Stranded 1 FT Long |
| White |
16 |
086580 (new # 086580-000) |
| Black |
16 |
086578 |
| White |
14 |
041974 |
| Black |
14 |
099650 |
| Blue |
18 |
191719 |
NOTES:
- The manufacturer may change part numbers and availability at any time.
- Use dash number after part number to indicate length of wire required in inches. Example, Green, #14 gauge, 20 in. length = part number 041972-020
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Wire, Striped Colors, #18 Gauge:
| Wire |
Part # |
| Black with White |
191694 |
| Black with Red |
191695 |
| Black with Yellow |
191696 |
| Black with Blue |
191697 |
| Black with Green |
191698 |
| White with Black |
191699 |
| White with Red |
191700 |
| White with Green |
191701 |
| White with Yellow |
191702 |
| White with Brown |
191703 |
| White with Blue |
191704 |
| White with Violet |
191705 |
| Yellow with Red |
191706 |
| Yellow with Black |
191707 |
| Yellow with Blue |
191708 |
| Yellow with Violet |
191709 |
| Yellow with Brown |
191710 |
| Yellow with Green |
191711 |
| Blue with Red |
191712 |
| Blue with White |
191713 |
| Blue with Yellow |
191714 |
| Red with Yellow |
191715 |
| Red with White |
191716 |
| Red with Green |
191717 |
| Red with Blue |
191718 |
NOTES:
- The manufacturer may change part numbers and availability at any time.
- Use dash number after part number to indicate length of wire required in inches. Example, Yellow with Brown Strip, 20 in. length = part number 191710-020. |
Download original AO Smith Parts List
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