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Grundfos Low Water Pressure Booster Pump 13 GPM 3/4 HP 230 V, MQ3-35-230

Grundfos Pumps Pressure Booster Pump13 GPM 3/4 HP 230 V, MQ3-35-230 (C) <br>

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Grundfos Pumps low water pressure booster pumps are designed for domestic applications where low noise is a major consideration. The water cooled unit eliminates the need for noisy cooling fans. Up to 3 water outlets can be operated at the same time without substantially reducing performance.

Capacity Table # MQ3-35-230 In Gallons Per Minute
Model	HP	Head In PSI				Shut-off
		30	35	40	45
		Gallons Per Minute (GPM)
MQ3-25-230	3/4	13	10	6	4	50 PSI

Specifications

Applications: Domestic water supply. Pressure boosting from well or city. Automatic water transfer. Type of pump: Single stage, self-priming centrifugal Pump construction: 304 Stainless steel and corrosion-resistant materials. Inlet & outlet: 1" MNPT X 1" MNPT(male pipe thread) Cut-in pressure: 30 PSI factory setting Maximum operating pressure: 109 PSI (Suction pressure plus discharge pressure cannot exceed 109 PSI) Tank size: 0.7 Gallons Suction lift: Capable of up to 25 feet Maximum inlet pressure: 44 PSI (Must install a pressure reducing valve on the suction side of the pump if the inlet pressure is more than 44 PSI) Electrical: 220-240 volts, 1 phase, 3.7 Amps., 60 Hz, 850 Watts, 3/4 HP, TEFC motor. Includes 6' electrical cord with bare leads Maximum water temperature: 95 degrees Fahrenheit Carton Dimensions: 24" high, 24" long, 12" wide. Weight: 30 lbs

Do not exceed a total system unregulated pressure of 109 PSI..

The total system pressure will be the incoming city pressure plus the maximum output pressure from the data above.

The maximum allowable city pressure for this unit is 50 PSI. Use a regulating valve in the suction side as required.

Use a regulating valves in the discharge line so that the regulated does not exceed 75 PSI to prevent pipe damage.

Before installing the system, be sure that your city flow meter can handle the maximum flow requirement.

Maximum Flow Rate Of Typical Residential Water Meters
Meter Size	Maximum Flow (GPM)	Caution
5/8"	12	Before ordering the booster system
3/4"	30	make sure that your water demands
1"	40	do not exceed the maximum flow rate
1-1/4	65	of your house water meter..

GRU-MQ-Boosters-Bulletin.pdf	GRU-MQ-Boosters-Manual.pdf
GRU-MQ-Boosters-Adjustment.pdf	GRU-MQ-Boosters-Check-List.pdf
GRU-MQ-Warranty-Statement.pdf

Watts Water Pressure Regulator 1" (006963) # N45BU-1(C)

Watts # N45BU-1, direct acting, water pressure reducing valve. Reduces high inlet pressure from up to 400 PSI to a lower adjustable outlet pressure from 25 to 75 PSI. 1" FNPT union inlet and 1" FNPT female outlet (no union)

List: ~~$107.00~~

Value Priced $80.14

Pressure Gauge 2" Liquid Filled 0-200 PSI # EILPG2002-4L (C)

Pressure Gauge 2" Liquid Filled 0-200 PSI glycerin liquid filled 2", 1/4" MNPT bottom connection, 2% accuracy, vacuum and pressure gauges with steel case and plastic lens for high vibration applications in 30 to 160 degrees Fahrenheit temperature. # EILPG2002-4L, Use only with water

List: ~~$9.65~~

Value Priced $7.24

Low Pressure Furnas Cut-off "Gard-it" Switch # 69WC7 (C)

The Gard-it switch is wired in series with a conventional pressure switch. If pump loses it's prime the system pressure will fall considerably below the cut-in point of the regular pressure switch. Gard-it will disconnect the pump motor.

List: ~~$90.00~~

Value Priced $67.43

Pressure Relief Valve 1/2" (Set 100 PSI) # IRV50-100NL

Pressure relief valve 1/2" heavy duty, no lead, bronze pressure relief valve for shallow, deep well and submersible pumps. Recommended only for cold water system installation. Spring loaded and pre-set at 100 PSI (Not adjustable). Not for use with hot water heaters.

List: ~~$20.00~~

Value Priced $14.50

Questions & Answers

What causes the MQ to start?: The pump will start when the flow rate is greater than 0.3 gpm OR the pressure is below 29 psi.
What causes the MQ to stop?: The pump will shut off in 12-15 seconds after flow stops. Additionally, the MQ will be turned off in the event of a dry-run or over temperature alarm.
What is the maximum height recommended between the MQ and any tap?: To allow for the pressure of 50 ft of water, tolerances and a safety margin, Grundfos recommends a maximum height of 50 ft between the MQ and any tap
What is the purpose of the built-in pressure tank?: It is designed to minimize motor startup due to small leaks.
How is the dry-run condition determined?: The dry-run alarm is declared when the motor is running AND the flow rate is less than 0.3 gpm and when the pressure is less than the pressure switch setting.
What is the maximum inlet pressure allowed in the MQ?: The maximum inlet pressure for the MQ3-35 is 50 psi…..The maximum inlet pressure for the MQ 3-45 is 40 psi The inlet pressure plus the MQ boosted pressure must not exceed 109 psi.
Where can a pressure gauge be easily installed?: In the ½" straight thread opening used to add priming water to the pump.

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