Thermocouple

[The Sheriff ILLIA.]

Fontera Arboleas  has lots of Water Heater fittings in stock.

[steveconway24]

Try the plumbing supplies place behind Lidl, they can order them for you, or get someone in the uk to get you one from Screwfix and have it posted over.
http://www.screwfix.com/search.do;jsessionid=vGQYQfLppd9kW56PM9PTRvWXKJhh1G2r0MkmglpTYCcLYDymvkW5!1449981206?fh_search=thermocouple&fh_view_size=20

[PAX]

Does anyone know where you can buy a thermocouple for a gas water heater from please ??