Comet P40 Soft Wash Diaphragm Pump with Gearbox (2025 New Model)

Comet P40 Soft Wash Diaphragm Pump with Gearbox & Regulator – 11 GPM, 300 PSI | Summary

The Comet P40 Soft Wash DiaphragmPump (30073-00008.10) is the upgraded, regulator-equipped version of Comet’s popular 3-diaphragm semi-hydraulic pump—purpose-built for high-volume, low-pressure chemical application. Delivering up to 11 GPM at 300 PSI, this model includes the GCP 20 regulator, making it a ready-to-mount solution for gas engine soft wash systems using a 3/4" horizontal shaft.

With rugged polypropylene construction, Buna diaphragms, and a factory-installed gearbox, the P40 B GR outperforms older styles (like 6158.0003.00) with improved flow, chemical compatibility, and maintenance access. Whether you’re building a new system or replacing an old P40, this model is the direct upgrade contractors need.