CT Softwash LLC - Power Washing & Roof CleaningAddress: 919 Colonel Ledyard Hwy, Ledyard, CT 06339Phone: (860) 993-9770PSI and GPM: Usually do not skip the meaning of PSI (lbs . for each square inch) and GPM (gallon for every minute) values added into the force washer And the way they affect the cleansing approach. A particularly superior PSI and G