To connect two asbestos pipes of different diameters, it was necessary to make a coupling - an adapter. On how it was done:
Tag: how to increase chimney draft
How to increase chimney draft. An unusual invention.
The effect of increasing the draft of the chimney was achieved by changing the direction of the wind from horizontal to vertical. The story ended with someone being awarded something for this “ratsuha” (who doesn’t know, that’s what life hacks were called in the USSR :).