In the United Kingdom, a tied house is a public house required to buy at least some of its beer from a particular brewery or pub company. Wikipedia

Pub tied into a specific brewery Wikidata

A public house which is either owned by a brewery, or other holding company, and run by a manager, or rented and run by a tenant, or perhaps contractually tied because of loans from a brewery, and which therefore is obliged to purchase a certain percentage of its stock from said pubco. Wiktionary