Astral BPM 400, BPM 600, BPM 700, BPM 800, BPM400A, BPM600A, BPM700A, BPM800A blue pressure flow switch parts. We now have a retrofit flow switch that can replace BP* heat pump pressure switches. Suits these heaters. First image shows how the new retrofit replaces the old pressure switch fittings. Note that wire modifications will be necessary.
Parts Available:
- Retrofit Flow Switch
- Pressure Switch Only
- Blue Threaded Cap – Obsolete
Flow switch must be oriented in direction of water flow.