(800) 378-1500
285 Portsmouth Ave. Stratham, NH 03885
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The Building Blocks for Water Treatment Equipment

“Everything but the Chemicals”

Northeast Pump and Instrument (NPI) specializes in the design, sale, installation and repair of chemical feed equipment, systems and instrumentation for water and wastewater treatment. Our involvement in the industry spans more than 30 years and our technical staff boasts over 100 years of combined industry experience.


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Frequently/Recently Asked Questions

Q: I need a custom built system, can NPI help?
A: Our expert technical team can specify and build a system suited to your unique requirements.

Q: Which LMI pumps will accept a 4-20 mA DC signal?
A: The LMI A9, B9, C9, M(with motor controller), & G-Series(with DC drive & motor controller) will accept a direct 4-20mA signal or can be controlled manually. Output from these pumps range from 10 GPD to 300 GPH.

Q: How can I automatically turn on a backup pump if my pump fails?
A: Our ALM family of pump monitors allow you to automatically switch on a backup pump in the event of a pump failure. Our ALM-9 provides a signal to TWO different electrical loads.

Q: My metering pump gives a "pulsating" type flow. How can I achieve a steady even flow of chemical?
A: Installing a BLACOH Sentry Pulsation Dampener in the discharge line will eliminate the "pulsating" flow from a metering pump. In addition, the BLACOH Sentry Pulsation Dampener will protect valves and fittings from pulsation and vibration.

Q: How long is the warranty period on LMI Pumps and Controllers?
A: The warranty period on LMI Pumps and Controllers is two (2) years from the date of installation. Elastomeric expendable parts are not covered under warranty.

(800) 378-1500
285 Portsmouth Ave.
Stratham, NH 03885