An ECP overlay system for a UIC-type distributor valve, the system comprising: a manifold body comprising a pipe bracket face configured to engage a face of a pipe bracket of a railway brake system, a valve face, and an electric manifold face; an electric manifold assembly engaged with the electric manifold face of the manifold body, the electric manifold assembly having a pneumatic mode where the electric manifold assembly is configured to allow pneumatic-only control of a brake cylinder of railway brake system and an ECP mode where the electric manifold assembly is configured to allow electronic control of a brake cylinder of a railway brake system, the electric manifold assembly comprising a cut-out valve, a fill valve, and a brake cylinder exhaust valve, the cut-out valve, the fill valve, and the brake cylinder exhaust valve each having an open position and closed position, and wherein, when the electric manifold assembly is in the ECP mode with the fill valve in the open position and the cut-out valve and the brake cylinder exhaust valve each in the closed position, the fill valve is configured to place an auxiliary reservoir pressure passage in fluid communication with a brake cylinder pressure passage, the cut-out valve, the fill valve, and the brake cylinder exhaust valve are electronically controlled via a cut-out solenoid, a fill solenoid, and a brake cylinder exhaust solenoid, respectively characterized in that the valve face of the manifold body is configured to engage a face of a UIC-type distributor valve of a railway brake system, and in that the cut-out valve, the fill valve, and the brake cylinder exhaust valve each comprise a diaphragm check valve, with the cut-out valve biased to the open position, the fill valve biased to the closed position, the brake cylinder exhaust valve biased to the open position, and with the cut-out solenoid, the fill solenoid, and the brake cylinder exhaust solenoid each configured to supply pneumatic pressure to the respective cut-out valve, the fill valve, and the brake cylinder exhaust valve to maintain the cut-out valve, the fill valve, and the brake cylinder exhaust valve in the closed position. a manifold body comprising a pipe bracket face configured to engage a face of a pipe bracket of a railway brake system, a valve face, and an electric manifold face; an electric manifold assembly engaged with the electric manifold face of the manifold body, the electric manifold assembly having a pneumatic mode where the electric manifold assembly is configured to allow pneumatic-only control of a brake cylinder of railway brake system and an ECP mode where the electric manifold assembly is configured to allow electronic control of a brake cylinder of a railway brake system, the electric manifold assembly comprising a cut-out valve, a fill valve, and a brake cylinder exhaust valve, the cut-out valve, the fill valve, and the brake cylinder exhaust valve each having an open position and closed position, and wherein, when the electric manifold assembly is in the ECP mode with the fill valve in the open position and the cut-out valve and the brake cylinder exhaust valve each in the closed position, the fill valve is configured to place an auxiliary reservoir pressure passage in fluid communication with a brake cylinder pressure passage, the cut-out valve, the fill valve, and the brake cylinder exhaust valve are electronically controlled via a cut-out solenoid, a fill solenoid, and a brake cylinder exhaust solenoid, respectively characterized in that the valve face of the manifold body is configured to engage a face of a UIC-type distributor valve of a railway brake system, and in that the cut-out valve, the fill valve, and the brake cylinder exhaust valve each comprise a diaphragm check valve, with the cut-out valve biased to the open position, the fill valve biased to the closed position, the brake cylinder exhaust valve biased to the open position, and with the cut-out solenoid, the fill solenoid, and the brake cylinder exhaust solenoid each configured to supply pneumatic pressure to the respective cut-out valve, the fill valve, and the brake cylinder exhaust valve to maintain the cut-out valve, the fill valve, and the brake cylinder exhaust valve in the closed position.