Manifold pressure monitoring The gauge provides a local visual indication of the water pressure within the UFH manifold. This helps installers monitor pressure while filling and testing the system and identify unexpected pressure changes during servicing or operation. Replacement for 413 Series manifolds This component is designed for compatible Ambiente 413 Series stainless steel manifolds. The correct pressure-gauge adaptor is required between the gauge and manifold, and compatibility with other manifold ranges should not be assumed. Installation and testing The heating system must be isolated, cooled and fully depressurised before the existing gauge is removed. Install the replacement using the correct adaptor and sealing arrangement, then refill and test the completed connection for leakage.