Heater radiator replacement for preventative maintenance? (1 Viewer)

[Tyland Cruiser]

There is an o-ring if you have this type of heater.
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Thank you. I don't find a separate part or part number for an o-ring in that location. It must be sold only as part of that pipe, which is NLA as far as I can tell. Do know what size o-ring to use in that location?

 

[60 toy ota]

On the 60 series many (including me) have the o-ring joint soldered

 

[NeverFinis]

Thank you. I don't find a separate part or part number for an o-ring in that location. It must be sold only as part of that pipe, which is NLA as far as I can tell. Do know what size o-ring to use in that location?

I don't know its size. I just reused the o-ring when I had the heater core serviced.