Backer Hotwatt Tubular Heaters Screw Plug
Eagle Sensors & Controls is an authorized Backer Hotwatt distributor. Contact us with sales and application support.
Tubular-and-Finned-TubularDescription
UL and C-UL Recognized-E177353
Features
- Ratings and sizes other than those listed are available.
- Brass, steel, or stainless steel screw plugs in 1″, 1 1/4″, 2″, and 2 1/2″ sizes.
- Element supports in multiple element units for proper element spacing as required.
- Steel, stainless steel, copper, or incoloy sheathed elements.
One, two or three per unit depending on size. - Optional thermostat and well for temperature control.
- General purpose terminal housing with conduit opening.
Optional terminal housings for special applications. - 120v, 208v, 240v, 480v, single or three phase which are factory wired to your requirements.
- Long, trouble free service.
- Made in USA.
Construction
- Terminal housing, NEMA 1 general purpose, for electrical connections.
- Screw plug.
- Tubular heating element.
Screw Plug Heater Selection Guide
| Application | Solution or Application |
Alkaline or Acid Content (Est.% by Volume) |
Sheath Material |
Typical Watt Density (watts/sq.in.) |
Screw Plug Material |
|---|---|---|---|---|---|
| Water and Very
Mild Solutions |
Clean Water | pH6 to pH8 Neutral | Copper | 45 | Brass |
| Process Water or Very
Mild Solutions |
pH5 to pH9 2-3% | Incoloy | 45 | Stainless
Steel |
|
| Mild Solutions | 5-6% | Incoloy | 45 | Stainless
Steel |
|
| Demineralized or
Deionized Water |
— | Incoloy | 45 | Stainless Steel
Stainless Steel |
|
| Oil Heating | Low Viscosity Oil | — | Steel | 23 | Steel |
| Medium Viscosity Oil | — | Steel | 15 | Steel | |
| High Viscosity Oil | — | Steel | 6 | Steel | |
| Specialty Heaters | |||||
| Process Water
Demineralized Water Low Viscosity Oil |
pH5-pH9
— — |
Incoloy
Incoloy Incoloy |
45
45 23 |
Brass
Stainless
Steel Steel |
|
| Pipe Insert | — | Incoloy | 12 | Steel | |
| Hot Tubs, Spa | Treated | Incoloy | 100 | Brass | |
| Commercial Equipment | Clean Water
Clean Water |
Incoloy
Copper |
30
60 |
Brass
Brass |
*The following oil heaters are catalogued based on low viscosity oil. From medium and high viscosity oils, watt densities must be reduced in accordance with the above watt densities.
Installation
The heater is screwed into a pipe coupling or half coupling in the tank. Units must be immersed at all times for proper operation.
Oil Reservoir Heater
Tank Heater
Copper Sheath
| 1″ NPT: Copper Sheath | |
| No. of Elements: 1 | |
| Plug Type: Brass Screw | |
| Watts/sq.in.: Approx. 80 | |
| Application: Water |
| A Dim. Imm. Lgth | Cat. No. | Kilowatts | Volts |
|---|---|---|---|
| 5 1/4″ | LC9-5.25-X | .35 | 120 |
| 6 3/8″ | LC9-6.37-X | .50 | 120 |
| 6 3/8″ | LC9-6.37-X | .60 | 120 |
| 6 3/8″ | LC9-6.37-X | .75 | 120 |
| 6 3/8″ | LC9-6.37-X | .75 | 240 |
| 6 3/8″ | LC9-6.37-X | 1.0 | 120 |
| 6 3/8″ | LC9-6.37-X | 1.0 | 240 |
| 8 1/8″ | LC9-8.12-X | 1.2 | 120 |
| 8 1/8″ | LC9-8.12-X | 1.2 | 240 |
| 9 1/4″ | LC9-9.25-X | 1.5 | 120 |
| 9 1/4″ | LC9-9.25-X | 1.5 | 240 |
| 12 1/4″ | LC9-12.25X | 2.0 | 120 |
| 1 1/4″ NPT: Copper Sheath | |
| No. of Elements: 1 (Fold Back Design) | |
| Plug Type: Brass | |
| Watts/sq.in.: Approx. 80 | |
| Application: Water |
| A Dim. Imm. Lgth | Cat. No. | Kilowatts | Volts |
|---|---|---|---|
| 6 1/8″ | LC11-6.12-X | 1.0 | 120 |
| 6 1/8″ | LC11-6.12-X | 1.0 | 240 |
| 6 5/8″ | LC11-6.62-X | 2.0 | 120 |
| 6 5/8″ | LC11-6.62-X | 2.0 | 240 |
| 8 1/2″ | LC11-8.5-X | 2.5 | 120 |
| 9 1/16″ | LC11-9.06-X | 1.5 | 120 |
| 9 1/16″ | LC11-9.06-X | 1.5 | 240 |
| 10 3/16″ | LC11-10.18-X | 3.0 | 240 |
| 13 9/16″ | LC11-13.56-X | 4.0 | 240 |
| 16 15/16″ | LC11-16.93-X | 5.0 | 240 |
| 1 1/4″ NPT: Copper Sheath | |
| No. of Elements: 1 | |
| Plug Type: Brass | |
| Watts/sq.in.: Approx. 45min.-80max. | |
| Application: Water | |
| Terminal Enclosure: NEMA 1 |
| A Dim. Imm. Lgth | Cat. No. | Kilowatts | Volts |
|---|---|---|---|
| 6 1/8″ | LC11-6.12-XJ | .60 | 120 |
| 6 1/8″ | LC11-6.12-XJ | .60 | 240 |
| 6 1/8″ | LC11-6.12-XJ | .75 | 120 |
| 6 1/8″ | LC11-6.12-XJ | .75 | 240 |
| 6 1/8″ | LC11-6.12-XJ | 1.0 | 120 |
| 6 1/8″ | LC11-6.12-XJ | 1.0 | 240 |
| 1 1/4″ NPT: Copper Sheath | |
| No. of Elements: 2 | |
| Plug Type: Brass | |
| Watts/sq.in.: Approx. 45min.-80max. | |
| Application: Water | |
| Terminal Enclosure: NEMA 1 |
| A Dim. Imm. Lgth | Cat. No. | Kilowatts | Volts |
|---|---|---|---|
| 6 1/8″ | LC11-6.12-YJ | 1.0 | 120 |
| 6 1/8″ | LC11-6.12-YJ | 1.0 | 240 |
| 6 1/8″ | LC11-6.12-YJ | 1.2 | 120 |
| 6 1/8″ | LC11-6.12-YJ | 1.2 | 240 |
| 6 1/8″ | LC11-6.12-YJ | 1.5 | 120 |
| 6 1/8″ | LC11-6.12-YJ | 1.5 | 240 |
| 6 1/8″ | LC11-6.12-YJ | 2.0 | 120 |
| 6 1/8″ | LC11-6.12-YJ | 2.0 | 240 |
| 2″ NPT: Copper Sheath | |
| No. of Elements: 1 | |
| Plug Type: Brass Screw | |
| Watts/sq.in.: Approx. 45 | |
| Application: Water | |
| Terminal Enclosure: NEMA 1 |
| A Dim. Imm. Lgth | Cat. No. | Kilowatts | Volts |
|---|---|---|---|
| 12″ | LC13-12-XJ | 1.5 | 120 |
| 12″ | LC13-12-XJ | 1.5 | 240 |
| 12″ | LC13-12-XJ | 1.5 | 480 |
| 18″ | LC13-18-XJ | 2.0 | 120 |
| 18″ | LC13-18-XJ | 2.0 | 240 |
| 18″ | LC13-18-XJ | 2.0 | 480 |
| 2″ NPT: Copper Sheath | |
| No. of Elements: 2 | |
| Plug Type: Brass Screw | |
| Watts/sq.in.: Approx. 45 | |
| Application: Water | |
| Terminal Enclosure: NEMA 1 |
| A Dim. Imm. Lgth | Cat. No. | Kilowatts | Volts |
|---|---|---|---|
| 7 7/8″ | LC13-7.87-YJ | 2.0 | 120 |
| 7 7/8″ | LC13-7.87-YJ | 2.0 | 240 |
| 7 7/8″ | LC13-7.87-YJ | 2.0 | 480 |
| 9 3/8″ | LC13-9.37-YJ | 2.5 | 120 |
| 9 3/8″ | LC13-9.37-YJ | 2.5 | 240 |
| 9 3/8″ | LC13-9.37-YJ | 2.5 | 480 |
| 12″ | LC13-12-YJ | 3.0 | 120 |
| 12″ | LC13-12-YJ | 3.0 | 240 |
| 12″ | LC13-12-YJ | 3.0 | 480 |
| 18″ | LC13-18-YJ | 4.0 | 240 |
| 18″ | LC13-18-YJ | 4.0 | 480 |
| 19 7/8″ | LC13-19.87-YJ | 5.0 | 240 |
| 19 7/8″ | LC13-19.87-YJ | 5.0 | 480 |
| 25″ | LC13-25-YJ | 6.0 | 240 |
| 25″ | LC13-25-YJ | 6.0 | 480 |
| 28″ | LC13-28-YJ | 7.0 | 240 |
| 28″ | LC13-28-YJ | 7.0 | 480 |
| 40 3/8″ | LC13-40.37-YJ | 10.0 | 240 |
| 40 3/8″ | LC13-40.37-YJ | 10.0 | 480 |
| 2 1/2″ NPT: Copper Sheath | ||
| No. of Elements: 3 | ||
| Plug Type: Brass Screw | ||
| Watts/sq. in.: Approx. 45 | ||
| Application: Water | ||
| Terminal Enclosure: NEMA 1 |
| A Dim. Imm. Lgth | Cat. No. | Kilowatts | Volts | Phase |
|---|---|---|---|---|
| 7 3/8″ | LC15-7.37-ZJ | 3.0 | 240 | 1 |
| 7 3/8″ | LC15-7.37-ZJ | 3.0 | 240 | 3 |
| 7 3/8″ | LC15-7.37-ZJ | 3.0 | 480 | 3 |
| 8 7/8″ | LC15-8.87-ZJ | 3.75 | 240 | 1 |
| 8 7/8″ | LC15-8.87-ZJ | 3.75 | 240 | 3 |
| 8 7/8″ | LC15-8.87-ZJ | 3.75 | 480 | 3 |
| 11 3/8″ | LC15-11.37-ZJ | 4.5 | 240 | 1 |
| 11 3/8″ | LC15-11.37-ZJ | 4.5 | 240 | 3 |
| 11 3/8 | LC15-11.37-ZJ | 4.5 | 480 | 1 |
| 11 3/8″ | LC15-11.37-ZJ | 4.5 | 480 | 3 |
| 17 3/8″ | LC15-17.37-ZJ | 6.0 | 240 | 1 |
| 17 3/8″ | LC15-17.37-ZJ | 6.0 | 240 | 3 |
| 17 3/8″ | LC15-17.37-ZJ | 6.0 | 480 | 1 |
| 17 3/8″ | LC15-17.37-ZJ | 6.0 | 480 | 3 |
| 19 1/8″ | LC15-19.12-ZJ | 7.5 | 240 | 1 |
| 19 1/8″ | LC15-19.12-ZJ | 7.5 | 240 | 3 |
| 19 1/8″ | LC15-19.12-ZJ | 7.5 | 480 | 1 |
| 19 1/8″ | LC15-19.12-ZJ | 7.5 | 480 | 3 |
| 24 1/2″ | LC15-24.5-ZJ | 9.0 | 240 | 1 |
| 24 1/2″ | LC15-24.5-ZJ | 9.0 | 240 | 3 |
| 24 1/2″ | LC15-24.5-ZJ | 9.0 | 480 | 1 |
| 24 1/2″ | LC15-24.5-ZJ | 9.0 | 480 | 3 |
Steel Sheath
| 1″ NPT: Steel Sheath | |
| No. of Elements: 1 | |
| Plug Type: Steel Screw | |
| Watts/sq.in.: Approx. 20 | |
| Application:Low Viscosity Oil |
| A Dim. Imm. Lgth | Cat. No. | Kilowatts | Volts |
|---|---|---|---|
| 9 1/2″ | LS9-9.5-X | .37 | 120 |
| 9 1/2″ | LS9-9.5-X | .37 | 240 |
| 12 1/2″ | LS9-12.5-X | .50 | 120 |
| 12 1/2″ | LS9-12.5-X | .50 | 240 |
| 18 7/8″ | LS9-18.87-X | .80 | 120 |
| 18 7/8″ | LS9-18.87-X | .80 | 240 |
| 1 1/4″ NPT: Steel Sheath | |
| No. of Elements: 2 | |
| Plug Type: Steel | |
| Watts/sq.in.: Approx. 20 | |
| Application: Low Viscosity Oil | |
| Terminal Enclosure: NEMA 1 |
| A Dim. Imm. Lgth | Cat. No. | Kilowatts | Volts |
|---|---|---|---|
| 12 1/2″ | LS11-12.5-YJ | 1.0 | 120 |
| 12 1/2″ | LS11-12.5-YJ | 1.0 | 240 |
| 2″ NPT: Steel Sheath | |
| No. of Elements: 2 | |
| Plug Type: Steel Screw | |
| Watts/sq.in.: Approx. 20 | |
| Application: Low Viscosity Oil | |
| Terminal Enclosure: NEMA 1 |
| A Dim. Imm. Lgth | Cat. No. | Kilowatts | Volts |
|---|---|---|---|
| 11 3/4″ | LS13-11.75-YJ | 1.5 | 120 |
| 11 3/4″ | LS13-11.75-YJ | 1.5 | 240 |
| 11 3/4″ | LS13-11.75-YJ | 1.5 | 480 |
| 17 3/4″ | LS13-17.75-YJ | 2.0 | 120 |
| 17 3/4″ | LS13-17.75-YJ | 2.0 | 240 |
| 17 3/4″ | LS13-17.75-YJ | 2.0 | 480 |
| 19 3/4″ | LS13-19.75-YJ | 2.5 | 120 |
| 19 3/4″ | LS13-19.75-YJ | 2.5 | 240 |
| 19 3/4″ | LS13-19.75-YJ | 2.5 | 480 |
| 24 7/8″ | LS13-24.87-YJ | 3.0 | 120 |
| 24 7/8″ | LS13-24.87-YJ | 3.0 | 240 |
| 24 7/8″ | LS13-24.87-YJ | 3.0 | 480 |
| 32 3/4″ | LS13-32.75-YJ | 4.0 | 120 |
| 32 3/4″ | LS13-32.75-YJ | 4.0 | 240 |
| 32 3/4″ | LS13-32.75-YJ | 4.0 | 480 |
| 40 1/4″ | LS13-40.25-YJ | 5.0 | 120 |
| 40 1/4″ | LS13-40.25-YJ | 5.0 | 240 |
| 40 1/4″ | LS13-40.25-YJ | 5.0 | 480 |
| 47 3/4″ | LS13-47.75-YJ | 6.0 | 240 |
| 47 3/4″ | LS13-47.75-YJ | 6.0 | 480 |
| 2 1/2″ NPT: Steel Sheath | ||
| No. of Elements: 3 | ||
| Plug Type: Steel Screw | ||
| Watts/sq. in.: Approx. 20 | ||
| Application: Low Viscosity Oil | ||
| Terminal Enclosure: NEMA 1 |
| A Dim. Imm. Lgth | Cat. No. | Kilowatts | Volts | Phase |
|---|---|---|---|---|
| 17 3/8″ | LS15-17.37-ZJ | 3.0 | 240 | 1 |
| 17 3/8″ | LS15-17.37-ZJ | 3.0 | 240 | 3 |
| 17 3/8″ | LS15-17.37-ZJ | 3.0 | 480 | 1 |
| 17 3/8″ | LS15-17.37-ZJ | 3.0 | 480 | 3 |
| 19″ | LS15-19-ZJ | 3.75 | 240 | 1 |
| 19″ | LS15-19-ZJ | 3.75 | 240 | 3 |
| 19″ | LS15-19-ZJ | 3.75 | 480 | 1 |
| 19″ | LS15-19-ZJ | 3.75 | 480 | 3 |
| 24 1/2″ | LS15-24.50-ZJ | 4.5 | 240 | 1 |
| 24 1/2″ | LS15-24.50-ZJ | 4.5 | 240 | 3 |
| 24 1/2″ | LS15-24.50-ZJ | 4.5 | 480 | 1 |
| 24 1/2″ | LS15-24.50-ZJ | 4.5 | 480 | 3 |
| 32 3/8″ | LS15-32.37-ZJ | 6.0 | 240 | 1 |
| 32 3/8″ | LS15-32.37-ZJ | 6.0 | 240 | 3 |
| 32 3/8″ | LS15-32.37-ZJ | 6.0 | 480 | 1 |
| 32 3/8″ | LS15-32.37-ZJ | 6.0 | 480 | 3 |
| 40″ | LS15-40-ZJ | 7.5 | 240 | 1 |
| 40″ | LS15-40-ZJ | 7.5 | 240 | 3 |
| 40″ | LS15-40-ZJ | 7.5 | 480 | 1 |
| 40″ | LS15-40-ZJ | 7.5 | 480 | 3 |
| 47 3/8″ | LS15-47.37-ZJ | 9.0 | 240 | 1 |
| 47 3/8″ | LS15-47.37-ZJ | 9.0 | 240 | 3 |
| 47 3/8″ | LS15-47.37-ZJ | 9.0 | 480 | 1 |
| 47 3/8″ | LS15-47.37-ZJ | 9.0 | 480 | 3 |
Incoloy Sheath
| ″ NPT: Incoloy Sheath | |
| No. of Elements: 1 | |
| Plug Type: Stainless Steel Screw | |
| Watts/sq.in.: Approx. 45 | |
| Application: Process Water and Very Mild Solution | |
| Terminal Enclosure: NEMA 1 |
| A Dim. Imm. Lgth | Cat. No. | Kilowatts | Volts |
|---|---|---|---|
| 11 1/2″ | LA13-11.5-XJ | 1.5 | 120 |
| 11 1/2″ | LA13-11.5-XJ | 1.5 | 240 |
| 17 1/2″ | LA13-17.5-XJ | 2.0 | 120 |
| 17 1/2″ | LA13-17.5-XJ | 2.0 | 240 |
| 2″ NPT: Incoloy Sheath | |
| No. of Elements: 2 | |
| Plug Type: Stainless Steel Screw | |
| Watts/sq.in.: Approx. 45 | |
| Application: Process Water and Very Mild Solution | |
| Terminal Enclosure: NEMA 1 |
| A Dim. Imm. Lgth | Cat. No. | Kilowatts | Volts |
|---|---|---|---|
| 8″ | LA13-8-YJ | 2.0 | 240 |
| 8″ | LA13-8-YJ | 2.0 | 480 |
| 9 1/2″ | LA13-9.5-YJ | 2.5 | 240 |
| 9 1/2″ | LA13-9.5-YJ | 2.5 | 480 |
| 12″ | LA13-12-YJ | 3.0 | 240 |
| 12″ | LA13-12-YJ | 3.0 | 480 |
| 18″ | LA13-18-YJ | 4.0 | 240 |
| 18″ | LA13-12-YJ | 4.0 | 480 |
| 19 1/8″ | LA13-19.12-YJ | 5.0 | 240 |
| 19 1/8″ | LA13-19.12-YJ | 5.0 | 480 |
| 25 1/4″ | LA13-25.25-YJ | 6.0 | 240 |
| 25 1/4″ | LA13-25.25-YJ | 6.0 | 480 |
| 28 1/8″ | LA13-28.12-YJ | 7.0 | 240 |
| 28 1/8″ | LA13-28.12-YJ | 7.0 | 480 |
| 40 1/2″ | LA13-40.5-YJ | 10.0 | 240 |
| 40 1/2″ | LA13-40.5-YJ | 10.0 | 480 |
| 48″ | LA13-48-YJ | 12.0 | 240 |
| 48″ | LA13-48-YJ | 12.0 | 480 |
| 54″ | LA13-54-YJ | 15.0 | 240 |
| 54″ | LA13-54-YJ | 15.0 | 480 |
| 2 1/2″ NPT: Incoloy Sheath | ||
| No. of Elements: 3 | ||
| Plug Type: Stainless Steel Screw | ||
| Watts/sq.in.: Approx. 45 | ||
| Application: Process Water and Very Mild Solution | ||
| Terminal Enclosure: NEMA 1 |
| A Dim. Imm. Lgth | Cat. No. | Kilowatts | Volts | Phase |
|---|---|---|---|---|
| 7 1/8″ | LA15-7.12-ZJ | 3.0 | 240 | 1 |
| 7 1/8″ | LA15-7.12-ZJ | 3.0 | 240 | 3 |
| 7 1/8″ | LA15-7.12-ZJ | 3.0 | 480 | 3 |
| 11 1/4″ | LA15-11.25-ZJ | 4.5 | 240 | 1 |
| 11 1/4″ | LA15-11.25-ZJ | 4.5 | 240 | 3 |
| 11 1/4″ | LA15-11.25-ZJ | 4.5 | 480 | 1 |
| 11 1/4″ | LA15-11.25-ZJ | 4.5 | 480 | 3 |
| 17″ | LA15-17-ZJ | 6.0 | 240 | 1 |
| 17″ | LA15-17-ZJ | 6.0 | 240 | 3 |
| 17″ | LA15-17-ZJ | 6.0 | 480 | 1 |
| 17″ | LA15-17-ZJ | 6.0 | 480 | 3 |
| 19″ | LA15-19-ZJ | 7.5 | 240 | 1 |
| 19″ | LA15-19-ZJ | 7.5 | 240 | 3 |
| 19″ | LA15-19-ZJ | 7.5 | 480 | 1 |
| 19″ | LA15-19-ZJ | 7.5 | 480 | 3 |
| 24 1/8″ | LA15-24.12-ZJ | 9.0 | 240 | 1 |
| 24 1/8″ | LA15-24.12-ZJ | 9.0 | 240 | 3 |
| 24 1/8″ | LA15-24.12-ZJ | 9.0 | 480 | 1 |
| 24 1/8″ | LA15-24.12-ZJ | 9.0 | 480 | 3 |
| 32 1/8″ | LA15-32.12-ZJ | 12.0 | 240 | 1 |
| 32 1/8″ | LA15-32.12-ZJ | 12.0 | 240 | 3 |
| 32 1/8″ | LA15-32.12-ZJ | 12.0 | 480 | 1 |
| 32 1/8″ | LA15-32.12-ZJ | 12.0 | 480 | 3 |
| 39 1/2″ | LA15-39.5-ZJ | 15.0 | 240 | 1 |
| 39 1/2″ | LA15-39.5-ZJ | 15.0 | 240 | 3 |
| 39 1/2″ | LA15-39.5-ZJ | 15.0 | 480 | 1 |
| 39 1/2″ | LA15-39.5-ZJ | 15.0 | 480 | 3 |
| 47 1/8″ | LA15-47.12-ZJ | 18.0 | 240 | 1 |
| 47 1/8″ | LA15-47.12-ZJ | 18.0 | 240 | 3 |
| 47 1/8″ | LA15-47.12-ZJ | 18.0 | 480 | 1 |
| 47 1/8″ | LA15-47.12-ZJ | 18.0 | 480 | 3 |
Dimensions
Screw plug and enclosure dimensions shown in proceeding tables may vary.
Special Features
SF-13B: Moisture tight/Explosion resistant terminal enclosure
Available on: 1″, 1 1/4″, 2″, 2 1/2″, NPT screw plugs. Enclosure sizes vary with element size.
XS-55: Thermostat control, integral bulb and capillary control with thermowell. Two temperature ranges available. Specify XS-55 (0°-100°F) or XS-55 (60°-250°F).
Available on: 1 1/4″, 2″, 2 1/2″, NPT screw plugs.
Enclosure sizes vary with element size.