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Here at Spa Parts Shop we stock the most commonly used spa flow through heaters.
Flow through heaters are tube style heaters with an internal heating element.
These tubes range in length from 8"-19", the most common length is 15". The tubes are also listed by diameter; 1.5", 2" or  2" which refers to rough ID of the heater tube.
Below is a list of many smaller spa manufactures heaters which can still be purchased through us.
If we have the heater available for purchase, the part number & 'Click Here' will be visible.
For non-stocked heaters please contact us. Typically special order spa heaters can be order in 10-14 days.

Spa Parts Shop also carries an extensive selection of replacement heater elements.
Our blog also has great tips on diagnosing heater issues! Click here for our Help Blog.


5.5kw 240v 2" x 19" Flow Thru Heater C2550-F002 [Special Order Heater]

5.5kw 240v 2″ x 19″ Flow Thru Heater

Replaces F2550-0002

VITA 5.5kw 240V 2"x17.5" Flow Thru Heater C2400-1008ET [Special Order Heater]

VITA 4.0kw 240V 2″x17.5″ Flow Thru Heater

SUNDANCE/MARQUIS 5.5kw 240V 2"x15" L Shape Heater C2400-0119 [Special Order Heater]

SUNDANCE/MARQUIS 4.0kw 240V 2″x15″ L Shape Heater

LA - ADVANCED 5.5kw 240V 2"x15" Flow Thru Heater C2400-0736 [Special Order Heater]

LA – ADVANCED 4.0kw 240V 2″x15″ Flow Thru Heater

Replaces: 48-3400-10-736H

HYDRO QUIP 4.0kw 240V 2″x15″ Flow Thru Heater C2400-0309 [Special Order Heater]

HYDRO QUIP 4.0kw 240V 2″x15″ Flow Thru Heater

Replaces: 20-00278-C

5.5kw 240v 2" x 12.5" C2550-2300 Click Here to View

CORRECT TECH 5.5kw 240V 2″x12.5″ Flow Thru Heater

Replaces: C2550-2300ET

4kw 240v 2" x 15"  1st Generation Heater with pressure C2400-0503-TPS Click Here to View

4kw 240v 2″ x 15″ Dual sensor heater for Free Flow systems

Replaces: 58001

4kw 240v 2" x 15" Dual sensor heater for Free Flow systems C2400-0807-F [Special Order Heater]

4kw 240v 2″ x 15″ Dual sensor heater for Free Flow systems

Replaces: 58085

BRETT EM100 & EM190 / ACURA / ACC / ACTION / SPLASH / PDC / HYDRO QUIP 4.0kw 240V 2"x15" Flow Thru Heater C2550-0304A Click Here to View

BRETT EM100 & EM190 / ACURA / ACC / ACTION / SPLASH / PDC / HYDRO QUIP 5.5kw 240V 2″x15″ Flow Thru Heater

Replaces: C2550-0304TI, (-1 or PD or ET-PD), C2550-0314 (ET or EP), 20-00430, 20-00417, 20-00307, B24055E, B24055E, 48-3300-10-304H

BRETT EM100 & EM190 / ACURA / ACC / ACTION / SPLASH / PDC / HYDRO QUIP 4.0kw 240V 2"x15" Flow Thru Heater C2400-0304 [Special Order Heater]

BRETT EM100 & EM190 / ACURA / ACC / ACTION / SPLASH / PDC / HYDRO QUIP 4.0kw 240V 2″x15″ Flow Thru Heater

Replaces: C2400-0304TI, (-1 or PD or ET-PD), C2400-0314 (ET or EP), 20-00433, 20-00434 (4.5kw), 20-00454, 20-00317, B24040E

ACURA 5.5kw 240V 2"x15" Flow Thru Heater C2550-1056 Click Here To View

ACURA 5.5kw 240V 2″x15″ Flow Thru Heater

Replaces: C2550-1056TI, B24055A

ACURA / ACC 4.0kw 240V 2"x15" Flow Thru Heater C2550-1054 [Special Order Heater]

ACURA / ACC 5.5kw 240V 2″x15″ Flow Thru Heater

Replaces: C2550-1054TI, C2550-1054TI-1

ACURA / ACC 4.0kw 240V 2"x15" Flow Thru Heater C2400-1054 [Special Order Heater]

ACURA / ACC 4.0kw 240V 2″x15″ Flow Thru Heater

Replaces: C2400-1054TI, C2400-1054TI-1

ACC 4.0kw 240V 2"x12" Flow Thru Heater C2550-1004 Click Here To View

ACC 5.5kw 240V 2″x12″ Flow Thru Heater

Replaces: C2550-1004TI, C2550-1004TI-1

ACC 4.0kw 240V 2"x12" Flow Thru Heater C2400-1004 [Special Order Heater]

ACC 4.0kw 240V 2″x12″ Flow Thru Heater

Replaces: C2400-1004TI(-1), C2450-1004, B24040KX

BALBOA 1.0kw 240V 1.5"x8.5" Flow Thru Heater Used on Sundance C1100-0210-1 [Special Order Heater]

BALBOA 1.0kw 120V 1.5″x8.5″ Flow Thru Heater Used on Sundance

BALBOA 1.0kw 240V 1.5"x8.5" Flow Thru Heater Used on Sundance C2100-0210-1 [Special Order Heater]

BALBOA 1.0kw 240V 1.5″x8.5″ Flow Thru Heater Used on Sundance

BALBOA 1st GEN 4.0w 240V 2"x15" Flow Thru Heater C2550-0535 [Special Order Heater]

BALBOA 1st GEN 5.5kw 240V 2″x15″ Flow Thru Heater

Replaces: 48-3300-10-535H / C2550-0735 / C2550-0537 / C2550-07352 / 48-3300-10-435H / C2550-0435

BALBOA 1st GEN 4.0w 240V 2"x15" Flow Thru Heater C2400-0535 Click Here to View

BALBOA 1st GEN 4.0kw 240V 2″x15″ Flow Thru Heater

Replaces: C2400-C2839-2, C2400-0537, C2400-0735, C2400-07352, C2400-0435, 50081, 50067, B240040LB (Light Leader)

BALBOA LE 4.0w 240V 2"x15" Flow Thru Heater C2550-0809 Click Here to View

BALBOA LE 5.5kw 240V 2″x15″ Flow Thru Heater

Replaces: 58027

BALBOA LE 4.0w 240V 2"x15" Flow Thru Heater C2400-0809 [Special Order Heater]

BALBOA LE 4.0kw 240V 2″x15″ Flow Thru Heater

Replaces: 58029

BALBOA DUAL SENSOR TAPS 4.0w 240V 2"x15" Flow Thru Heater C2550-0807 Click Here to View

BALBOA DUAL SENSOR TAPS 5.5kw 240V 2″x15″ Flow Thru Heater

Replaces: 58002, 58016

BALBOA DUAL SENSOR TAPS 4.0w 240V 2"x15" Flow Thru Heater C2400-0807 Click Here for Details

BALBOA DUAL SENSOR TAPS 4.0kw 240V 2″x15″ Flow Thru Heater

Replaces: 58103, 58032

BRETT / CALDERA 5.5w 240V 2"x15" Flow Thru Heater C2550-0033 [Special Order Heater]

BRETT / CALDERA 5.5kw 240V 2″x15″ Flow Thru Heater

Replaces: 48-3300-10-033HB

BRETT - PINNACLE HURICANE 11kw 240V 3"x15" Flow Thru Heater Dual Element E21100-3100 Click Here To View

BRETT – PINNACLE HURICANE 11kw 240V 3″x15″ Flow Thru Heater Single Element

BRETT - PINNACLE HURICANE 11kw 240V 3"x15" Flow Thru Heater Dual Element E21100-3150 [Special Order Heater]

BRETT – PINNACLE HURICANE 11kw 240V 3″x15″ Flow Thru Heater Dual Element

BRETT / GATSBY 5.5kw 240V 2"x15" Flow Thru Heater C2550-0066ET-A [Special Order Heater]

BRETT / GATSBY 5.5kw 240V 2″x15″ Flow Thru Heater

Replaces: 20-00319, 22-5020

BRETT - PINNACLE 11kw 240V 2"x14" EM1000 Flow Thru Heater Dual Element B21100-2012 [Special Order Heater]

BRETT – PINNACLE 11kw 240V 2″x14″ EM1000 Flow Thru Heater Dual Element

COATES 4.0kw 240V 2"x15" Flow Thru Heater 20-00517 [Special Order Heater]

COATES 5.5kw 240V 2″x15″ Flow Thru Heater

Replaces: C2550-0517

COATES 4.0kw 240V 2"x15" Flow Thru Heater 20-00518 [Special Order Heater]

COATES 4.0kw 240V 2″x15″ Flow Thru Heater

COLEMAN 1.0kw 120V 1.5"x10" Flow Thru Heater C1100-0216 Click Here For Details

COLEMAN 1.0kw 120V 1.5″x10″ Flow Thru Heater

Replaces: 20-00450

CORRECT TECH/INGENIOUS PROD 4.0kw 240V 2"x11" Flow Thru Heater C2500-2311 [Special Order Heater]

CORRECT TECH / INGENIOUS PROD 5.5kw 240V 2″x11″ Flow Thru Heater

Replaces: C2550-2311ET, 20-00635, B24055Y

CORRECT TECH/INGENIOUS PROD 4.0kw 240V 2"x11" Flow Thru Heater C2400-2311 Click for Details

CORRECT TECH / INGENIOUS PROD 4.0kw 240V 2″x11″ Flow Thru Heater

Replaces: C2400-2311ET, 20-00634, B24040Y

CORRECT TECH 4.0kw 240V 2"x14.5" Flow Thru Heater C2500-2315 [Special Order Heater]

CORRECT TECH 5.5kw 240V 2″x14.5″ Flow Thru Heater

Replaces: C2550-2315ET, 20-00486

CORRECT TECH 4.0kw 240V 2"x14.5" Flow Thru Heater C2400-2315ET [Special Order Heater, 5-pcs Min]

CORRECT TECH 4.0kw 240V 2″x14.5″ Flow Thru Heater

Replaces: C2400-2315ET, 20-00484

CORRECT TECH 4.0kw 240V 2"x12.5" Flow Thru Heater C2400-2300ET Click for Details

CORRECT TECH 4.0kw 240V 2″x12.5″ Flow Thru Heater

EMERALD / CONWAY 6.0kw 240V 1.5"x16" Flow Thru Heater C2600-C1774-1 [Special Order Heater]

EMERALD / CONWAY 6.0kw 240V 1.5″x16″ Flow Thru Heater

GECKO 5.0kw 240V 3"x15" Dual Element Flow Thru Heater C2550-3600ET-G [Special Order Heater]

GECKO 5.0kw 240V 3″x15″ Dual Element Flow Thru Heater

GECKO 4.5kw 240V 3"x15" Flow Thru Heater C2450-3101ET [Special Order Heater]

GECKO 4.5kw 240V 3″x15″ Flow Thru Heater

GECKO 5.5kw 240V 3"x15" Flow Thru Heater C2550-3602ET-G [Special Order Heater]

GECKO 5.5kw 240V 3″x15″ Flow Thru Heater

GECKO 4.0kw 240V 2"x15" M Class Flow Thru Heater C2550-0601 Click for Details

GECKO 5.5kw 240V 2″x15″ M Class Flow Thru Heater

Replaces: C2550-0601ET, B24055LAS, B24055LASD, B24055U, 20-00250, 20-00251, 20-00249, & 20-00270

GECKO 4.0kw 240V 2"x15" M Class Flow Thru Heater C2400-0601 Click For Details

GECKO 4.0kw 240V 2″x15″ M Class Flow Thru Heater

Replaces: WATKINS C2400-C3330-1A, WATKINS C2400-C2695-1, B24040LAS, 20-00294, NORDIC C2695-1, C2400-0601ET, 20-00271, 20-00280, 20-00281, 20-00292, 20-00296, & 20-00410

GECKO 4.0kw 240V M Class Flow Thru Heater C2550-0800 Click For details

GECKO 5.5kw 240V 2″x15″ S Class Flow Thru Heater

Replaces: C2550-0800ET, B24055GM, 20-00272, & 20-00274

GECKO 4.0kw 240V M Class Flow Thru Heater C2400-0800 Click for Details

GECKO 4.0kw 240V 2″x15″ S Class Flow Thru Heater

Replaces: C2400-0800ET, B24040GM, 20-00284, & 20-00285

HERCULES 5.5kw 240V 2"x18" Flow Thru Heater C2550-0155 Click For Details

HERCULES 5.5kw 240V 2″x18″ Flow Thru Heater

Replaces: C2550-0157, C2550-0154, & 48-3300-10-154H; 48-3300-10-155H

HYDRO QUIP 5.5kw 240V 2"x15" Flow Thru Heater C2550-0309 [Special Order Heater]

HYDRO QUIP 5.5kw 240V 2″x15″ Flow Thru Heater

Replaces: C2550-0309ET, 20-00287C, & B23025R1

HYDRO QUIP 4.0kw 240V 2"x15" Flow Thru Heater C2550-0307 Click here for details

HYDRO QUIP 5.5kw 240V 2″x15″ Flow Thru Heater

Replaces: C2550-0307ET, 20-00227, 20-00328

HYDRO QUIP 4.0kw 240V 2"x15" Flow Thru Heater C2450-0307 Click For Details

HYDRO QUIP 4.5kw 240V 2″x15″ Flow Thru Heater

Replaces: C2450-0307ET

HYDRO QUIP 4.0kw 240V 2"x15" Flow Thru Heater C2400-0307 [Special Order Heater]

HYDRO QUIP 4.0kw 240V 2″x15″ Flow Thru Heater

Replaces: C2400-0307ET

HYDRO QUIP 4.0kw 240V 2"x15" Flow Thru Heater C2550-0002 [Special Order Heater]

HYDRO QUIP 5.5kw 240V 2″x15″ Flow Thru Heater

Replaces: C2550-0002ET, 20-00224

HYDRO QUIP 4.0kw 240V 2"x15" Flow Thru Heater C2400-0002 [Special Order Heater]

HYDRO QUIP 4.0kw 240V 2″x15″ Flow Thru Heater

Replaces: C2400-0002ET

HYDRO QUIP 11kw 240V 3"x19.25" Dual Element Flow Thru Heater C21100-3077 [Special Order Heater]

HYDRO QUIP 11kw 240V 3″x19.25″ Dual Element Flow Thru Heater

HYDRO QUIP 1.0kw 120V 2"x10" Flow Thru Heater C1100-1200-1 Click for Details

HYDRO QUIP 1.0kw 120V 2″x10″ Flow Thru Heater

JUMP KING 1.0kw 120V 1.5"x8.5" Flow Thru Heater C1100-0012 [Special Order Heater]

JUMP KING 1.0kw 120V 1.5″x8.5″ Flow Thru Heater

Replaces: 48-3400-30-01-012

4.0kw 240V 2"X12" Flow Thru Heater C2400-0001 [Special Order Heater]

4.0kw 240V 2″x12″ Flow Thru Heater

Replaces: 48-3600-10-001H

LA - ADVANCED 5.5kw 240V 2"x15" Flow Thru Heater C2550-0736 Click for Details

LA – ADVANCED 5.5kw 240V 2″x15″ Flow Thru Heater

Replaces: B24055LA2, 48-3300-10-736H

LA - ADVANCED 5.5kw 240V 2"x15" Flow Thru Heater C2550-0071 [Special Order Heater]

LA – ADVANCED 5.5kw 240V 2″x15″ Flow Thru Heater

Replaces: B24055LA, 48-3300-10-071H

MADDOX ENT. 4.0kw 240V 2"x15" Flow Thru Heater C2550-0073 [Special Order Heater]

MADDOX ENT. 5.5kw 240V 2″x15″ Flow Thru Heater

Replaces: 20-00326, C2550-0073-S (Set), C2550-0072

MADDOX ENT. 4.0kw 240V 2"x15" Flow Thru Heater C2400-0073 [Special Order Heater]

MADDOX ENT. 4.0kw 240V 2″x15″ Flow Thru Heater

Replaces: 20-00247, C2400-0073-S (Set)

NORDIC 4.0kw 240V 2"x15" Flow Thru Heater C2400-C2550-2 [Special Order Heater]

NORDIC 4.0kw 240V 2″x15″ Flow Thru Heater

NUWAVE/WEST COAST 5.5kw 240V 2"x15" Flow Thru Heater C2550-0313N Click for Details

NUWAVE/WEST COAST 5.5kw 240V 2″x15″ Flow Thru Heater

Replaces: 20-00348, B24055C1

NUWAVE/WEST COAST 5.5kw 240V 2"x15" Flow Thru Heater C2400-0313N [Special Order Heater]

NUWAVE/WEST COAST 4.0kw 240V 2″x15″ Flow Thru Heater

NUWAVE/WEST COAST 4.0kw 240V 2"x19" Flow Thru Heater C2550-0213N Click for details

NUWAVE/WEST COAST 5.5kw 240V 2″x19″ Flow Thru Heater

Replaces: C2550-0213, 20-00406, B24055C, 48-3300-10-013H

NUWAVE/WEST COAST 4.0kw 240V 2"x19" Flow Thru Heater C2400-0213N [Special Order Heater]

NUWAVE/WEST COAST 4.0kw 240V 2″x19″ Flow Thru Heater

SBSG 4.0kw 240V 2"x15" Flow Thru Heater LX20/25/30 (Pressure tap on back side of the tube) C2550-0256 Click for details

SBSG 5.5kw 240V 2″x15″ Flow Thru Heater LX20/25/30

Replaces: C2550-0256ET, 48-3300-10-256H

SBSG 4.0kw 240V 2"x15" Flow Thru Heater LX20/25/30 (Pressure tap on back side of the tube) C2400-0256 [Special Order Heater]

SBSG 4.0kw 240V 2″x15″ Flow Thru Heater LX20/25/30

Replaces: C2400-0256ET

SUNDANCE/SBSG 4.0kw 240V 2"x12" Flow Thru Heater AP1 & LX15 C2550-0056 Click for details

SUNDANCE/SBSG 5.5kw 240V 2″x15″ Flow Thru Heater AP1 & LX15

Replaces: C2550-0056ET, B24055Q(QC), 20-00227, C2550-0556 (SC), C2550-0556

SUNDANCE/SBSG 4.0kw 240V 2"x12" Flow Thru Heater AP1 & LX15 C2400-0056 Click for details

SUNDANCE/SBSG 4.0kw 240V 2″x15″ Flow Thru Heater AP1 & LX15

Replaces: C2400-0056ET, B24040Q(QC), 20-00354, C2400-0556

SUNDANCE/SBSG 4.0kw 240V 2"x12" Flow Thru Heater AP4 & LX10 C2550-1002 Click for details

SUNDANCE/SBSG 5.5kw 240V 2″x12″ Flow Thru Heater AP4 & LX10

Replaces: C2550-1002ET, 48-3300-10-002H / 48-3300-10-003H

SUNDANCE/SBSG 4.0kw 240V 2"x12" Flow Thru Heater AP4 & LX10 C2400-1002 Click for details

SUNDANCE/SBSG 4.0kw 240V 2″x12″ Flow Thru Heater AP4 & LX10

Replaces: C2400-1002ET, 48-3600-10-002H

SUNDANCE/SBSG 5.5kw 240V 2"x15" Flow Thru Heater C2550-0120 Click for Details

SUNDANCE/SBSG 5.5kw 240V 2″x15″ Flow Thru Heater

Replaces: 48-3300-10-120H / 6500-211

SUNDANCE/SBSG 4.0kw 240V 2"x15" Flow Thru Heater C2550-0267ET Click for Details

SUNDANCE/SBSG 5.5kw 240V 2″x15″ Flow Thru Heater

Replaces: C2550-0267

SUNDANCE/SBSG 4.0kw 240V 2"x15" Flow Thru Heater C2400-0267ET [Special Order Heater]

SUNDANCE/SBSG 4.0kw 240V 2″x15″ Flow Thru Heater

Replaces: C2400-0267

SUNDANCE/MARQUIS 5.5kw 240V 2"x15" L Shape Heater C2550-0119 Click Here to View

SUNDANCE/MARQUIS 5.5kw 240V 2″x15″ L Shape Heater

Replaces: 48-3300-10-119H

SUNDANCE 4.0kw 240V 2"x12" Flow Thru Heater C2550-0104 Click Here to View

SUNDANCE 5.5kw 240V 2″x12″ Flow Thru Heater

SUNDANCE 4.0kw 240V 2"x12" Flow Thru Heater C2400-0104 [Special Order Heater]

SUNDANCE 4.0kw 240V 2″x12″ Flow Thru Heater

5.5kw 240V 2"x15" Flow Thru Heater Dual Dry wells C2550-0000 [Special Order Heater]

5.5kw 240V 2″x15″ Flow Thru Heater Dual Dry wells

Replaces: 48-3300-00-000

5.5kw 240V 2"x15" Flow Thru Heater Dual Dry wells C2400-0000 [Special Order Heater]

4.0kw 240V 2″x15″ Flow Thru Heater Dual Dry wells

UNITED 5.5kw 240V 2"x15" Flow Thru Heater C2550-1227 [Special Order Heater]

UNITED 5.5kw 240V 2″x15″ Flow Thru Heater

UNITED 5.5kw 240V 2"x15" Flow Thru Heater C2400-1227 [Special Order Heater]

UNITED 4.0kw 240V 2″x15″ Flow Thru Heater

UNITED 4.0kw 240V 2"x13.25" Flow Thru Heater Dual Element C2550-1206 [Special Order Heater]

UNITED 5.5kw 240V 2″x13.25″ Flow Thru Heater

UNITED 4.0kw 240V 2"x13.25" Flow Thru Heater Dual Element C2400-1206 [Special Order Heater]

UNITED 4.0kw 240V 2″x13.25″ Flow Thru Heater

VITA 5.5kw 240V 2"x17.25" Flow Thru Heater Dual Element C2550-0108 [Special Order Heater]

VITA 5.5kw 240V 2″x17.25″ Flow Thru Heater Dual Element

VITA 5.5kw 240V 2"x17.5" Flow Thru Heater C2550-1008ET Click Here to View

VITA 5.5kw 240V 2″x17.5″ Flow Thru Heater

Also available in 4.5kw, 4.0kw, & 3.0kw
Replaces: C2550-1008

VITA 4.0kw 240V 2"x15" Flow Thru Heater C2550-0024ET Click Here to View

VITA 5.5kw 240V 2″x15″ Flow Thru Heater

VITA 4.0kw 240V 2"x15" Flow Thru Heater C2400-0024ET [Special Order Heater]

VITA 4.0kw 240V 2″x15″ Flow Thru Heater

VITA 4.0kw 240V 2"x15" Flow Thru Heater C2550-0028ET [Special Order Heater]

VITA 5.5kw 240V 2″x15″ Flow Thru Heater

Replaces: C2550-0027ET

VITA 4.0kw 240V 2"x15" Flow Thru Heater C2400-0028ET [Special Order Heater]

VITA 4.0kw 240V 2″x15″ Flow Thru Heater

Replaces: C2400-0027ET

VITA 5.5kw 240V 2"x15" Flow thru heater C2550-0010ET [Special Order Heater]

VITA 5.5kw 240V 2″x15″ Flow thru heater

Watkins 1.0kw 120V 2"x10" Flow thru heater C1100-C2507-1 [Special Order Heater]

Watkins 1.0kw 120V 2″x10″ Flow thru heater

Replaces: C1100-C1789-1


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