teakettle purger, n. — Green’s Dictionary of Slang

teakettle purger n.

[? one who purges, i.e. cleans teakettles or uses tea to purge out alcohol; note Ducange Anglicus, The Vulgar Tongue (1857), definition: ‘men who exchange their old clothes’]

a total abstainer.

1840		Courier (Hobart, Tas.) 27 Oct. 3/1: [advert, from UK source] A decent allowance made to seedy swells, tea-kettle purgers, head rollers, and Flunkeys out of Collar.
1857		advert in ‘Ducange Anglicus’ Vulgar Tongue (1857) 45: A decent allowance made to Seedy Swells, Tea Kettle Purgers, Head Robbers, and Flunkeys out of Collar.
1909		J. Ware Passing Eng. of the Victorian Era.