Bosch 8738715053 Water Valve With Engine

- Motorized water valve for HVAC hydronic heating and cooling circuits.

- Diverts, opens, and closes water flow on controller signal.

- Motor voltage rated at 24 VDC.

- Maximum water temperature rating of 80 degrees Celsius.

- Black polymer valve body with three barbed hose spigots.

- Barbed ports fit standard flexible hose under clamp pressure without adapters.

- Low-profile actuator head secured to the body by a steel bracket.

- Geared actuator drives the internal diverter mechanism.

- Three conductor harness with keyed plug-in connector.

- Two rubber O-rings included for resealing port faces.

- Model designation T405-187R.

- Alternate part number 8-738-715-053.

The Bosch 8738715053 is a motorized water valve that controls and redirects water flow within HVAC systems, opening, closing, or switching the circuit on a signal from the unit's controller so heated or chilled water is routed to the correct loop during operation. Its black polymer valve body is configured as a multi port diverter with three barbed spigots that slip directly onto standard flexible hose runs and hold under clamp pressure without adapters, which keeps the assembly compact enough for tight equipment cabinets while still handling full circuit flow, and the low profile white actuator head mounts to the body on a steel bracket and drives the internal diverter through a geared 24 VDC motor rated for water temperatures up to 80 degrees Celsius. Power and control run through a short three-conductor harness terminating in a keyed connector for plug-in installation; two rubber O-rings are supplied for resealing the port faces during fitting, and the valve carries model designation T405-187R.