Directory: Catalog > Boilers & Water Heaters > Heat Transfer Products (HTP) > Parts

Parts for the Munchkin Contender MC120 Boiler

  • Match the Item # on the chart with the same Item # indicated on one of the three line art diagrams below the chart.
  • Items not currently for sale on our site do not have yellow links and are marked with an asterisk. Please Contact Us for price and availability.
  • See the parts list sorted by part number.


Expanded View (Diagram 1)

Item # Description Part #
1 Composite Module 7500P-014
2 Ceramic Target Wall 7250P-160
3 Burner Door Ceramic Refractory 7500P-076
4 Burner Door 7500P-078
5 Nuts - M6 (Burner Door) 7500P-067
6 Burner 7500P-017
7 Gasket (Burner) 7500P-074
8 Air/Gas Channel (with Torx Screws) 7500P-079
9 Torx Screw (Air/Gas Channel) 7500P-068
10 Gasket (Flame Rectification Probe/Spark Electrode) 7250P-005
11 Flame Rectification Probe (with Gasket) 7500P-039
12 Spark Electrode (with Gasket) 7350P-020
13 Screw M4 x 8 MM (Flame Rectification Probe/Spark Electrode) 7250P-069
14 Gasket (Air Channel to Combustion Blower) 64980043 (old # 7500P-075)
15 Combustion Blower Motor (with Screws) 7500P-195
(new # 7500P-031)
16 Screws M5 X 12MM (Combustion Blower) 7250P-478
17 Gas Valve Adapter Plate (with Screws) 7250P-644 (new # 64980046)
18 Screws M4 X 12MM (Gas Valve Adapter Plate) 7500P-105
19 Air Intake Adapter 7500P-184 (new # 64980047)
20 Gas Valve Swirl Plate 7500P-186
21 Air Intake Adapter 7500P-185 (new # 64980050)
22 Gas Valve (with Swirl Plate, Screws) 7500P-180
23 Screw M4 x 25MM (Gas Valve) 7250P-718
24 O-Ring (Gas Valve Piping Assembly) 7500P-094
25 Gas Valve Piping Assembly 7500P-095
26 Screws M5 x 12MM (Gas Valve Piping Assembly) 7500P-099
27 2 in. Flex Hose - 25 in. Long 7500P-189

Side / Piping View (Diagram 2)

Item # Description Part #
31 Concentric Flue Outlet Assembly 7500P-020
32 Gasket (Concentric Flue Outlet) 7500P-008
33 Flue ECO (with O-Ring) 7250P-739
34 O-Ring (Barbed Fitting & Pressure Switch) 7250P-152
35 S.S. Barbed Fitting (with O-Ring) 7250P-154 (new # 64980137)
36 Water Pressure Switch (with O-Ring) 7250P-081
37 O-Ring (Water Pressure Switch) 7500P-100
38 Clear Tubing 3/16 ID X 5/16 OD 7000P-805
39 Water Pressure Switch Adapter (with O-Ring) 7500P-003
40 O-Ring (Water Pressure Switch Adapter) 7500P-124
41 Water Pressure Switch Clip 7500P-077
42 Supply/Return Manifold Clip 7500P-080
43 O-Ring (Supply/Return Manifold) 7500P-026
44 Thermistor 7250P-059
45 High Limit Sensor 7500P-033
46 Relief Valve 7250P-080
  High Pressure Relief Valve 7250P-219
47 Supply Manifold Assembly (with O-Ring) 7500P-029
48 Return Manifold Assembly (with O-Ring) - Discontinued, no longer available 7500P-030
49 Temperature / Pressure Gauge 7500P-098
  High Pressure Temperature / Pressure Gauge 7450P-222 (same as 7250P-499)
50 Flow Switch 7250P-517
51 1-1/4 X 1-1/4 X 3/4 in. NPT Copper Tee N/A

Bottom / Control Board View (Diagram 3)

Item # Description Part #
61 Blocked Vent Pressure Switch 7250P-150 (new # 64980007)
62 Screws 8-32 X 3/8 (Blocked Vent Pressure Switch) 7500P-047 (purchase from local hardware store)
63 926 Control Board (with Fuse)
- For units built after July, 2008, or if the board has been previously upgraded from 925 to 926
(also use 7500P-1103)
  926 Control Board Upgrade Kit
  • For units built before July, 2008 that have the 925 Control Board
  • Includes 926 Control Board (with Fuse) 7350P-008, Display Card and Ribbon Cable 64980136 (old # 7350P-009), Spark Cable 7250P-653, Hold Down Clips 7250P-352, and Flue Jumper Wire (if needed).


(also use 7500P-1043)
64 9 Pin Wiring Harness 7500P-301 (new # 7500P-054)
  5 Pin Wiring Harness 7500P-055
65 Low Voltage Wiring Harness 7500P-053
66 Screw # 6 X 14 (Control Board) 7500P-115
67 Clamp - Module to Bracket (with Screws) 7500P-073
68 Screw M6 (Clamp) 7500P-069 (purchase from local hardware store)
69 Nylon Hose Clamp 7250P-210
70 Condensate Hose (Clear) 7500P-057
71 Screw 8-32 X 3/8 (Filler / Gas Inlet Plate) 7500P-047 (purchase from local hardware store)
72 Supply / Return Filler Plate (with Screws) 7500P-023*
73 Lip Style Grommet - 1 in. 7500P-050
74 Lip Style Grommet - 1/2 in. 7500P-049
75 Gas Inlet Plate 7500P-043*
76 Condensate Cup (with Overflow Switch) 7500P-090
77 926 Display (Card and Ribbon Cable) 7350P-009 (new # 64980136)
  925 Display (Card and Front Panel) 7500P-058

Other Parts (Not Shown)

Item # Description Part #
  Control Board Clips (not shown) 7250P-352
  Control Board Fuse (not shown) 7250P-378
  Spark Cable (not shown) 7250P-653
  Universal Boiler Stand Kit (not shown) 7500P-300
  Contender Cover 7500P-028
  Natural Gas to Propane Gas Conversion Kit (not shown) 7250P-714
  Propane to Natural Gas Conversion Kit (not shown) 7250P-715
  See Accessories - PC connection, vent kits, mesh screens, etc.  


Expanded View (Diagram 1)

Contender Parts List


Side / Piping View (Diagram 2)


Contender Parts List - Piping


Bottom / Control Board View (Diagram 3):


Contender Parts List - Side View


Getting an error code on your display? Here are common Munchkin Error Codes and their Remedies.