The Megaflo 95605894 Multibloc Inlet Control Valve with pressure relief is a genuine Heatrae Sadia component designed for Megaflo unvented cylinders. Featuring a 3-bar pressure reducer, 8-bar pressure relief and non-return valve, and an isolation valve, this control kit ensures optimal system performance and safety. Compatible with a wide range of Megaflo cylinders, including HE Mark 3 and Eco models, this verified component (218-388-0012) is essential for maintaining your unvented system.