Could you post a pic of exactly what you're hoping to achieve? Ive looked through Naylor's catalogue, cant find the 15005 listed. Im still thinking from your description a McAlpine DC1 would achieve your aim.
Hepsleve/Densleeve and Hepseal/Denseal are 2 different types. Sleve is the plain ended thinwall clay, using plastic collars to joint. Seal is the thicker walled type, wih spigot/socket joints. A 'Seal' spigot will fit in the socket of a salt glazed pipe same diameter. Naylor part 19149 or Hepsleve SA2/1, as said will take you from salt glazed socket to a plain end sleve, whack a SA9 on that and you're onto 110mm plastic.
Hepsleve/Densleeve and Hepseal/Denseal are 2 different types. Sleve is the plain ended thinwall clay, using plastic collars to joint. Seal is the thicker walled type, wih spigot/socket joints. A 'Seal' spigot will fit in the socket of a salt glazed pipe same diameter. Naylor part 19149 or Hepsleve SA2/1, as said will take you from salt glazed socket to a plain end sleve, whack a SA9 on that and you're onto 110mm plastic.