Breaking M&A Analysis•M&A and Private EquityWatsco’s Granite Group Deal Is $505 Million. HVAC’s Biggest Distributor Is Pushing Deeper Into Plumbing.A September 17 SEC filing disclosed the number missing from Watsco’s original announcement: $505 million for The Granite Group, an 82-location plumbing and HVAC distributor with about $500 million in annual sales. The bigger contractor story is what consolidation at the supply-house level does to inventory, technology, credit and local branch power.TradeVulcan Dispatch Editorial Desk•Sep 14, 2026•14 min