Allows all NPE, NPE-2 and NPN series models to control an external pump through the internal PCB. This product comes with a 90 day warranty from date of purchase.
- The Navien external pump wire provides a quick and easy wiring solution when a field-supplied recirculation pump is required
- Allows the Navien unit to control the pump operation based on the hot water temperature conditions
- Compatible for use with residential and commercial applications