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Myson / Potterton / Thorn 401637 O-Ring - Dowty 200-118-4470 - From S/N 8702406241

Myson / Potterton / Thorn 401637 O-Ring - Dowty 200-118-4470 - From S/N 8702406241
Special Order
Myson / Potterton / Thorn 401637 O-Ring - Dowty 200-118-4470 - From S/N 8702406241
  • Availability: Special Order
  • Product code: 401637
  • MPN: 401637
£4.66
Ex Tax: £3.88

This part is present 138 different boilers in the Myson range including the Myson Apollo 30B, Apollo 30C, Apollo 30S, Apollo 30Si.

At the bottom of the page is an appliance table with the links to all boilers that contain this part. Please use this if you would like to view all other spares that fit that model by clicking on your appliance model and download the user manual for that appliance. If none of these models match the appliance you have, please contact us before ordering so we can confirm this part is compatible.

We recommend that all parts are fitted by a fully qualified Gas Safe Registered Engineer. If you require any help locating a part, please feel free to contact us.


This Part Fits the following appliances:

ManufacturerAppliance ModelGC Number
MysonApollo 30B
MysonApollo 30C
MysonApollo 30S
MysonApollo 30Si
MysonApollo 40B
MysonApollo 40C
MysonApollo 40S
MysonApollo 40Si
MysonApollo 50B
MysonApollo 50C
MysonApollo 50S
MysonApollo 50Si
MysonApollo 60B
MysonApollo 60C
MysonApollo 60Si
MysonApollo 80B
MysonApollo 80C
MysonApollo 80Si
MysonApollo Fanfare 15/30S
MysonApollo Fanfare 30/50S
MysonApollo Fanfare 40S
MysonHousewarmer 45 Electronic BBU & Economy 2 Fire
MysonHousewarmer 45 Electronic BBU & Elegant 2 Fire
MysonHousewarmer 45 Electronic BBU & Emberglow 2 Fire
MysonHousewarmer 45 Electronic BBU & Epic 2 Fire
MysonHousewarmer 45 Electronic BBU & Legend 946 Fire
MysonHousewarmer 45 Electronic BBU & Mainflame 945 Fire
MysonHousewarmer 45 Electronic BBU & Spectacular Fire
MysonHousewarmer 45 Electronic BBU & Windsor Fire
MysonHousewarmer 55 Electronic BBU & Economy 2 928 Fire
MysonHousewarmer 55 Electronic BBU & Elegant 2 928 Fire
MysonHousewarmer 55 Electronic BBU & Emberglow 2 Fire
MysonHousewarmer 55 Electronic BBU & Epic 2 976 Fire
MysonHousewarmer 55 Electronic BBU & Legend 2 976 Fire
MysonHousewarmer 55 Electronic BBU & Mainflame 945 Fire
MysonHousewarmer 55 Electronic BBU & Spectacular 884 Fire
MysonHousewarmer 55 Electronic BBU & Windsor Fire
MysonHousewarmer Spectacular Deluxe 884/886 Fire
MysonHousewarmer Windsor 925 Fire
MysonMarathon 400B
MysonMarathon 400C
MysonMarathon 500B
MysonMarathon 500C
MysonMarathon 600B
MysonMarathon 700B
MysonOrion 30B
MysonOrion 30Si
MysonOrion 40B
MysonOrion 40Si
MysonOrion 50B
MysonOrion 50Si
MysonOrion 60Si
MysonOrion 75Si
PottertonFf55
PottertonFf75
PottertonNetaheat Profile 30E41-605-39
PottertonNetaheat Profile 40E41-605-40
PottertonNetaheat Profile 50E41-605-41
PottertonNetaheat Profile 50E LPG
PottertonNetaheat Profile 60E41-605-42
PottertonNetaheat Profile 60E LPG
PottertonNetaheat Profile 80E41-605-43
PottertonNetaheat Profile 80E LPG
PottertonPrima 100F41-607-06
PottertonPrima 30F41-607-01
PottertonPrima 40F41-607-02
PottertonPrima 50F41-607-03
PottertonPrima 60F41-607-04
PottertonPrima 80F41-607-05
PottertonProfile 100E
PottertonProfile 100E LPG41-605-69
PottertonProfile 30E
PottertonProfile 40E
PottertonProfile 40El41-590-50
PottertonProfile 50E
PottertonProfile 50E LPG41-605-66
PottertonProfile 50El41-590-51
PottertonProfile 60E
PottertonProfile 60E LPG41-605-67
PottertonProfile 60El41-590-52
PottertonProfile 80E
PottertonProfile 80E LPG41-605-68
PottertonProfile 80El41-590-53
PottertonProfile Prima 100E41-605-75
PottertonProfile Prima 100E LPG
PottertonProfile Prima 30E41-605-70
PottertonProfile Prima 40E41-605-71
PottertonProfile Prima 50E41-605-72
PottertonProfile Prima 50E LPG
PottertonProfile Prima 60E41-605-73
PottertonProfile Prima 60E LPG
PottertonProfile Prima 80E41-605-74
PottertonProfile Prima 80E LPG
PottertonUltra 2 3041-607-55
PottertonUltra 2 30 Dv41-607-50
PottertonUltra 2 30 Dv Programmer41-607-65
PottertonUltra 2 30 Programmer41-607-70
PottertonUltra 2 4041-607-56
PottertonUltra 2 40 Dv41-607-51
PottertonUltra 2 40 Dv Programmer41-607-66
PottertonUltra 2 40 Programmer41-607-71
PottertonUltra 2 5041-607-57
PottertonUltra 2 50 Dv41-607-52
PottertonUltra 2 50 Dv Programmer41-607-67
PottertonUltra 2 50 Programmer41-607-72
PottertonUltra 2 6041-607-58
PottertonUltra 2 60 Dv41-607-53
PottertonUltra 2 60 Programmer41-607-73
PottertonUltra 2 8041-607-59
PottertonUltra 2 80 Dv41-607-54
PottertonUltra 2 80 Dv Programmer41-607-69
PottertonUltra 2 80 Programmer41-607-74
PottertonUltra 3041-494-78
PottertonUltra 30 Dv41-494-73
PottertonUltra 4041-494-79
PottertonUltra 40 Dv41-494-74
PottertonUltra 5041-494-80
PottertonUltra 50 Dv41-494-75
PottertonUltra 6041-494-81
PottertonUltra 60 Dv41-494-76
PottertonUltra 8041-494-82
PottertonUltra 80 Dv41-494-77
ThornApollo 15/30B41-789-53
ThornApollo 15/30C41-789-55
ThornApollo 30/50B41-789-54
ThornApollo 30/50C41-789-56
ThornApollo 40B41-789-79
ThornApollo 40C41-789-78
ThornApollo 50/65B41-789-67
ThornApollo 50/65C41-789-68
ThornApollo Fanfare 15/30
ThornApollo Fanfare 15/30I
ThornApollo Fanfare 15/30Si
ThornApollo Fanfare 30/50
ThornApollo Fanfare 30/50I
ThornApollo Fanfare 40Si
Boiler Parts
Part TypeWashers, Gaskets, O-Rings & Seals