HEOSwater spare rings

[RichardB]

Hi all
I have a HEOSwater filler cap for my water tank but need to get the extra rings (as in attached photo) - I have lost mine - does anyone know anywhere that sells them ?(have asked HEOS but had no reply) or does anyone have then that they don't use and want to sell/donate?

Cheers

 

[WynandJean]

I seem to recall @Vicarious Books were selling the fillers so I don't know if they can help.

Wyn