AMTROL | sku: 288024 Amtrol No 30 Expansion Tank For Hydronic Boiler Amtrol No 30 Expansion Tank For Hydronic BoilerFactory Pre-Charge: 12 PsiMaximum Working Pressure: 100 PsiMaximum Operating Temperature: 240 Degree FWatertight Reservoir For Expanded WaterMFG# EX-30 Log in for pricing