Supply and deliver two American-made chemical feed pumps

Town of Merrimack,
New Hampshire
6 Baboosic Lake Rd * Merrimack, NH 03054 * www.merrimacknh.gov
September 16, 2026
REQUEST FOR BID
CHEMICAL FEED PUMPS
Sealed bids will be received by the Town of Merrimack until 2:00 pm on Tuesday, October 6, 2026
to supply and deliver two (2) peristaltic tube style "American Made" pumps compatible with and
capable of feeding 50% Sodium Hydroxide to the Town of Merrimack Wastewater Treatment
Facility according to the enclosed specifications and following conditions.
The bid shall be submitted on the Bid Form furnished herewith and shall exclude state and federal
taxes not applicable to municipalities. The bid price shall include delivery and be quoted F.O.B.
Town of Merrimack, Wastewater Treatment Facility, located at 36 Mast Rd, Merrimack, NH. The
time required for delivery must be indicated on the Bid Form and be guaranteed.
The Town reserves the right to reject any or all bids, to waive irregularities in the bids, and to accept
the bid which best serves the interest of the Town.
Two copies of the bids must be sealed and marked "Bid on Chemical Feed Pumps" and be delivered
to the Town of Merrimack Finance Department, 6 Baboosic Lake Rd, Merrimack, NH 03054 by the
time specified above .
It is the bidder's responsibility to confirm the bid is received by the Finance Department by the date
and time specified.
The Town of Merrimack's Purchasing Policy is available on the Town's website:
https://www.merrimacknh.gov/322/Bid-Opportunities; a copy may contact the Purchasing Agent.
For additional information, please contact Sandra Song, Purchasing Agent, at
ssong@merrimacknh.gov or (603) 424-7075.

TOWN OF MERRIMACK, NEW HAMPSHIRE
TOWN _______________________________________________
FINANCE DEPARTMENT
6 Baboosic Lake Road Tel: 603-424-7075
Merrimack, NH 03054
SPECIFICATIONS
The Town of Merrimack, New Hampshire, Wastewater Treatment Facility is requesting bids for
the purchase of two (2) peristaltic tube-style pumps compatible with and capable of feeding 50%
Sodium Hydroxide.
Base Bid - Tube Style Chemical Feed Pumps Only
Pump Requirements
The proposed pumps shall meet the following minimum requirements:
* Pump Type: Peristaltic tube-style pump suitable for feeding 50% Sodium Hydroxide.
* Feed Head: The feed head shall be a one-piece, integral design that can be changed without
the use of tools. The feed head must be completely sealed to prevent loss of chemical or
leakage.
* Leak Detection: Each pump must be equipped with an integrated leak-detection system
capable of sending a signal to initiate alarming, shut down the affected pump and initiate
automatic failover to the standby pump.
* Controls: The pump shall have all required controls integrated into the pump. A separate
Variable Frequency Drive shall not be required.
* Country of Manufacture: Due to current supply-chain concerns and extended lead times
associated with foreign-manufactured equipment, the Town will only consider pumps and
equipment manufactured in the United States.
* Replacement Feed Head: As part of the bid, the successful bidder shall provide one (1)
replacement feed head for each pump, for a total of two (2) replacement feed heads.
* Start-Up and Testing: Pump start-up and testing shall be included in the bid price.
* On-Site Training: The successful bidder shall provide on-site training equivalent to one (1)
full day. Training shall include operation, maintenance, troubleshooting, and replacement of
the pump feed head.
* Warranty: A manufacturer's warranty of five (5) years shall be provided for each pump and
shall be included in the bid price.
Technical Specifications for Tube Style Chemical Feed Pumps Only

TOWN OF MERRIMACK, NEW HAMPSHIRE
TOWN _______________________________________________
FINANCE DEPARTMENT
6 Baboosic Lake Road Tel: 603-424-7075
Merrimack, NH 03054
Technical Specifications
Flow Rate 0.1 ml/min to 1000 ml/min = 0.001 gph to 15.85 gph
Fluid 50% Sodium Hydroxide
Viscosity 78 to 85 mPa*s (centipoise, cP)
Specific Gravity 1.9
Fluid Temperature 41 degreesF to 113 degreesF (5 degreesC to 45 degreesC)
Average Operating Pressure 30 psi
Max Operating Pressure 60 psi
Operating Temp Range 41 degreesF to 113 degreesF (5 degreesC to 45 degreesC)
Weight 12.6 lbs (5.7 kg)
Control types Manual operation at the pump and remote 4-20 MA
Regulatory and Safety CE, cETLus, CSA, C-Tick, NSF 61
Certifications
Drive Ingress Protection IPP 66 / NEMA 4X
Drive Humidity 80% up to 31 degreesC, 88 degreesF, decreasing linearly to 50% at
40 degreesC, 104 degreesF
Drive Noise <70dB(A) at 1m
Drive power supply AC (120 V AC 50/60 Hz, 180 W)
Dimensions Height 234 mm (9.2"), Width 214 mm (8.4"), Width With
Pump Head 266 mm (10.5")
Materials of Construction
Bearings Stainless Steel / Steel
Drive Shaft Stainless Steel 440 C
Drive Case Work 20% glass filled PPE/PS
Drive Case Work Coating 20% glass filled PPE/PS
Fluid Connectors Polypropylene, PVDF
Drive keypad/HMI Polyester
Lubricant PFPE Based
Pump Body Assembly 30 % glass filled PPO/PS, 30% glass filled PPO/PS
Pump Rotator Head Assembly Glass filled Nylon
Tubing Compatible with 50% Sodium Hydroxide
Other Required Features
Drop in installation with no required ancillary equipment such as VFD's
No tools component replacement
No backpressure valves, pulsation dampener, degassing valves, foot valves, strainers or float
switches
Pump head and tubing must be an integral unit with the ability to contain the chemical with in
the pump head and have leak detection

TOWN OF MERRIMACK, NEW HAMPSHIRE
TOWN _______________________________________________
FINANCE DEPARTMENT
6 Baboosic Lake Road Tel: 603-424-7075
Merrimack, NH 03054
Alternate Bid - Complete Duplex Wall Mount Tube Style Chemical Feed Pump System
The Bidder shall provide pricing for a complete wall-mounted, two (2) pump package system
utilizing the specified pumps.
The complete pump package shall be furnished as a complete, functional system and shall include,
at a minimum:
* Two (2) specified peristaltic tube-style pumps;
* Valves;
* Pressure gauges;
* Calibration tube;
* Pressure relief valves; and
* All other equipment, components, fittings, connections, and appurtenances necessary to
provide a complete and operational system.
All components necessary for the proper installation and operation of the complete pump package
shall be included in the bid price, whether or not each individual component is specifically identified
herein.
The Bidder shall provide separate and clearly identified pricing for Base and Alternate. Pricing shall
include all equipment, materials, labor, delivery, start-up, testing, training, and other costs required
by these specifications.
Complete Chemical Metering System Specification
Part 1 - General
1.1 Description
A. Chemical metering pump system shall be a complete turnkey system inclusive of all
necessary fluid handling and ancillary components to ensure the reliable metering of
chemical into a treatment process.
B. The key components of this system are as follows:
1. Peristaltic Chemical Metering Pump
2. Calibration Column
3. Pressure Relief Valve
4. Discharge Pressure Gauge with Diaphragm Seal
5. Fabricated HDPE Four-Sided Enclosure with clear polycarbonate cover lid with
pre-piped Back Panel.
1.2 Quality Assurance
A. Chemical Metering System (skid) shall be manufactured by the chemical metering pump
manufacturer and shall provide pumps and accessories as a complete turnkey system.
Skids manufactured by third parties such as separate skid fabricators, pump distributors
or pump representatives are not acceptable.
B. This specification is the basis for design of peristaltic metering pumps. All pumps,

TOWN OF MERRIMACK, NEW HAMPSHIRE
TOWN _______________________________________________
FINANCE DEPARTMENT
6 Baboosic Lake Road Tel: 603-424-7075
Merrimack, NH 03054
whether named as an acceptable supplier or submitted as an equal shall, at a
minimum, meet the following critical design requirements.
1. Pump shall be 24 hr continuous duty rated and have a three-year
manufacturer's warranty from date of shipment.
2. For quality assurance, pumps shall be supplied and labeled by the original
manufacturer. Relabeled products, even under license by manufacturer, shall
not be acceptable.
3. Manufacturer shall have a minimum twenty (20) years of experience
manufacturing peristaltic pumps, shall have a direct business presence in the
United States for minimum of twenty (20) years, and shall employ a minimum
of fifty (50) employees in the United States. Manufacturers without a direct
American presence who distribute through a third-party distributor are not
acceptable.
4. Pumps shall be manufactured in compliance with ISO 9001-2015 standards.
5. Pumps shall meet CE, NSF 61 and applicable electrical standards.
6. To ensure proper function and quality, pumphead, tubing, and drive shall be
manufactured by the same company. Tubing purchased by the pump
manufacturer from a third party is not acceptable.
1.3 Submittals
A. Submit the following:
1. Certified shop drawings.
2. Characteristic performance curve showing flow rate as a function of RPM and
pressure.
3. Chemical Metering System Arrangement & Installation drawings.
4. Operating, maintenance, programming, and wiring instructions for all equipment
5. Tool-free pump head replacement instructions.
6. Manufacturer's certification that pump head, drive, and tubing are all manufactured by
the same manufacturer.
1.4 Delivery, Storage, & Handling
B. Shipping
1. Ship the Chemical Metering System completely assembled and ready for
installation.
2. Pack all additional spare parts in containers bearing labels clearly
designating contents and pieces of equipment for which intended.
3. Deliver spare parts at the same time as pertaining equipment. Deliver to
Owner after completion of work.
C. Receiving
1. Owner to inspect and inventory items upon delivery to site.
2. Owner to store and safeguard equipment, material, instructions, and spare
parts in accordance with manufacturer's written instructions.

TOWN OF MERRIMACK, NEW HAMPSHIRE
TOWN _______________________________________________
FINANCE DEPARTMENT
6 Baboosic Lake Road Tel: 603-424-7075
Merrimack, NH 03054
Part 2 - Chemical Metering System Design
2.1 Manufacturers
2.2 Chemical Metering System Components
A. Peristaltic Chemical Metering Pump
1. Pumps shall be positive displacement type complete with ReNu replaceable
cartridge-style peristaltic pumphead technology and self-contained variable
speed drive as specified.
2. Pumps shall be self-priming and shall have a maximum suction lift capability
of up to 17-feet vertical water column.
3. Discharge Pressure Rating: 60 psi
4. Pumps shall be capable of pumping both liquids without vapor locking
5. Pump shall not require the use of back pressure valves, suction foot valves,
strainers, pulsation dampeners, or auto degassing valves and shall not require
dynamic seals in contact with the pumped fluid. Process fluid shall be
contained within pump tubing and shall not directly contact any rotary or
metallic components during operation. Upon failure, the process fluid shall be
completely contained within the pump head to prevent hazardous exposure to
operators. Manufacturer's that do not offer a completely contained pump
head are not acceptable.
6. Pump Process Schedule
Quantity of Chemical Metering Systems 1 (2 Pump System)
Fluid
Viscosity Specific Gravity 78 to 85 mPa*s (centipoise, cP)
Fluid Temperature 1.9
41 degreesF to 113 degreesF (5 degreesC to 45 degreesC)
Flow Range Min- Max (GPH) 0.1 ml/min to 1000 ml/min = 0.001 gph to 15.85
Average Flow (GPH) 500 ml/min
Average Discharge Pressure (PSI) 30 psi
Maximum Discharge Pressure (PSI) 60 psi
Suction Head 17 ft.
2.3 Pump Construction
a. Pump head
1. Technology: Provide tool-free cartridge-style peristaltic pump head
technology. For operator safety, pumphead shall be serviceable as a
single replaceable component. Pumps that require an operator to open the

TOWN OF MERRIMACK, NEW HAMPSHIRE
TOWN _______________________________________________
FINANCE DEPARTMENT
6 Baboosic Lake Road Tel: 603-424-7075
Merrimack, NH 03054
pumphead for tube replacement, cleaning, or rebuilding or that require
tools for maintenance are unacceptable. In addition pumps with tubing
replacement procedures that require the pump to operate to perform this
function are not safe and are unacceptable.
2. Max rating: 15.85GPH at 60 psi discharge pressure.
3. Housing construction: corrosion resistant and high impact
resistant glass filled PPS or PPE/PS.
4. Geometry: Pumphead shall consist of sealed track housing with in- line
porting. Suction and discharge ports shall be 180 degrees apart with
bottom suction and top discharge.
5. Rotor: Pumphead rotor shall be constructed of glass filled Nylon, sealed
within the track housing, and supported by its own bearings. Peristaltic
occlusion level shall be factory set to ensure flow accuracy of +/- 1% and
repeatability performance of +/- 0.5% and shall not require any field
adjustment.
6. Contact Materials: All pumphead components in the fluid path shall
be NSF61 listed and shall be of materials specified by the
manufacturer as compatible with the process fluid.
7. Leak containment/detection: In the event of peristaltic element failure,
the leak sensor shall shut the pump down immediately with all process
fluid contained within the sealed pumphead.
* Sensor type: Utilize non-contacting optical sensor. Sensor shall not
come in contact with the process fluid, shall contain no moving parts,
shall not depend on the capacitance of the process fluid, shall not
require fluid to leak out of the pump housing for engagement, nor shall
require any sensitivity or calibration adjustment.
* Alarm: Sensor shall shut down the pump, give a visual indication on the
drive controller, and if specified shall provide an output general alarm
signal.
* For operator and environmental safety, pumps which do not have leak
containment, leak sensor, and shutdown are not acceptable. For additional
overpressure safety, sealed pumphead shall have a controlled drain-to-
waste port.
8. Port connections: Pumphead shall utilize 34" FNPT
Union style connection.
9. Spares: Provide one (1) spare pumphead per pump supplied.
b. Drive
1. Rating: Continuous 24 hour operation, 45o C ambient.
2. Voltage: Drive shall be suitable for 100-240VAC, 50-60Hz, 1- Phase with an
internal switch-mode power supply. Supply nine- foot length mains power cord
with standard 115VAC three-prong plug.

TOWN OF MERRIMACK, NEW HAMPSHIRE
TOWN _______________________________________________
FINANCE DEPARTMENT
6 Baboosic Lake Road Tel: 603-424-7075
Merrimack, NH 03054
3. Max drive power consumption: 350VA.
4. Enclosure: NEMA 4X constructed out of corrosion and impact resistant
engineering plastic, 20% Glass filled PPE/PS. By nature of the environmental
conditions, painted or unpainted metallic housing including 316SS are not
acceptable. Enclosure shall house the drive motor and all control circuitry in one
integrated unit. Separate VFDs and motors are not acceptable.
5. Direct coupled pumphead with fully protected drive
* Pumphead shall direct couple mount to the controller via a splined drive
shaft and shall be locked in place by a lever mechanism.
* Pumphead shall be fully sealed to prevent any contamination of the
controller or drive shaft by process fluid.
* Pumphead shall contain its own rotor bearings and not impart an
overhung load on the pump shaft.
* Pumpheads shall be supplied mounted to the left side of the drive
enclosure.
* Drive shall stop shaft rotation and give visual alarm in the event the
pumphead is removed.
6. Drive motor: brushless DC motor with integral gearbox and closed loop tachometer
feedback.
* Circuitry complete with temperature and load compensation
and protection.
Human Machine Interface (HMI) Control
1. Manual Control Interface
a. Flow range: 1,850:1 flow range from 0.001-15.85 GPH in 0.001 GPH increments.
b. Display: Backlit graphical TFT Display capable of up to 8 lines of text
with up to 26 characters per line to display pump tag number, flow rate,
and programming instructions. Display shall also provide visual indication
of running status via screen color: Blue = Running, White
= Stopped and Red = Warning.
c. Keypad: Keypad for start, stop, speed increment, speed decrement,
rapid prime, and programming.
d. Flow units: Programmable in either ml/min or gallons/hour.
e. Security: Programmable keypad lock and PIN security for optional
lockout of all keys except emergency start/stop.
f. Auto Restart: feature to resume pump status in the event of power outage
interruption.
g. Multilingual menu: include programming menus in nine languages,
including at a minimum English, Spanish, and French.
h. Fluid level monitor: Programmable flow totalization to advise operator

TOWN OF MERRIMACK, NEW HAMPSHIRE
TOWN _______________________________________________
FINANCE DEPARTMENT
6 Baboosic Lake Road Tel: 603-424-7075
Merrimack, NH 03054
when their supply tank is low.
2. Remote Control I/O
a. Speed Control Input: Analog 4-20mA speed input with 1,850:1
turndown with incremental steps of 10 microamps. Signal shall be
trimmable and speed scalable over any part of the drive speed range.
Pump shall be programmable to either increase pump speed or decrease
pump speed against an increasing Analog 4-20 mA signal.
b. Run/Stop Input: Either 5-24V industrial logic, dry contact or powered 110
VAC contacts as shown per the process and instrumentation drawings.
c. Status Outputs: Four status outputs, 24VDC Status relay, or 110VAC
Status Relay as required by the process and instrumentation drawings
software configurable to indicate the following:
1. General Alarm status
2. Running/Stopped status
3. Manual Mode status
4. Analog Mode status
5. Contact Mode status
6. Fluid Level status
7. Leak Detected status
d. Speed Analog Output: Analog 4-20mA
3. HMI, analog connections, and mains power shall be accessible from the front or side
of the enclosure.
4. Minimum requirements: Pumps that do not meet the minimum manual and automatic
control requirements as specified above are not acceptable.
B. Calibration Columns
1. Supply Calibration Column made of clear PVC cylinder materials, sealed
on both ends with appropriately sized NPT threaded ports both top and
bottom. Graduation markings shall be in fractions of gallons or milliliters in
proportion to the size of the column.
2. Column shall be sized to allow a minimum 30-second draw down at
maximum pump speed.
C. Pressure Relief Valve
1. Supply Pressure Relief Valve with PVC Body and PTFE/EPDM Diaphragm.
2. Relief Pressure shall be adjustable from 10-150 psi.
3. Connections shall be FNPT.
D. Discharge Gauge with Diaphragm Seal
1. Discharge Pressure Gauge shall have a 2.5-inch dial with a liquid filled case,
with a pressure range of 0-160 psig
2. Discharge Gauge shall be assembled to a Diaphragm Seal with a

TOWN OF MERRIMACK, NEW HAMPSHIRE
TOWN _______________________________________________
FINANCE DEPARTMENT
6 Baboosic Lake Road Tel: 603-424-7075
Merrimack, NH 03054
Viton Diaphragm and 1/2-inch NPT PVC process connection.
E. Fabricated HDPE Four-Sided Enclosure, Clear Polycarbonate Cover Lid, and Back
Panel
1. HDPE Shelf with Back Panel shall be fabricated out of 1/2-inch and 3/4-
inch sheet stock. The Shelf and Back Panel shall be fusion welded together.
Enclosure shall include a threaded drain port and access door to facilitate
easy maintenance when replacing the pumphead. Metallic Shelves & Back
Panels including those that are painted or coated are not acceptable.
2. Clear Polycarbonate cover lid to safeguard operators while still allowing
complete visibility of the metering system.
3. All necessary piping to incorporate the above equipment into a single
turnkey chemical metering system shall be secured to the Enclosure and
Back Panel.
4. HDPE Four-Sided Enclosure & Back Panel shall be designed to be either free
standing, wall mounted, or to be hung from a chemical tote.
5. Mounting Hardware & Installation shall be supplied by the Contractor
F. Isolation Valves
1. All Ball Valves, sizes 1/2-inch to 4-inch, shall have union connections. All O-rings
shall be EPDM or FKM based on chemical being pumped.
G. Piping
1. Polyvinylchloride (PVC) Pipe and fittings shall be manufactured of Rigid Poly
Vinyl Chloride (PVC) schedule 80. Fittings shall be heavy-duty Schedule 80
molded fittings.