Description Literature Accessories Description The Meriam 961P Pressure Pump has an integral variator, bleed valve, 1/8" FNPT connection, and pressure range of 0 to 145 PSIG. The pressure pump is an accessory for the Meriam M200-LS Smart Manometer and the Meriam MFT 4000 Series Modular Calibrator. State of California Proposition 65 WARNINGCancer and Reproductive Harm - www.P65Warnings.ca.gov. Literature & Docs Accessories Meriam Lab Standard Smart Manometer M200-LS Meriam Multi Function Modular Calibrator / HART Communicator MFT4000