What is the maximum head/flow of the Grundfos CR 3-3?

The CR 3-3 produces approximately 165 ft of head at 18 GPM (best efficiency point), with a shutoff head of about 198 ft. That corresponds to roughly 71 psi at the BEP.

What is the Grundfos CR 3-3 material number / part number?

The primary material number for this configuration (3-phase 208-230/460, HQQE seal) is 99916312. Other voltage and seal options are listed in the variants table on this page.

Which motor does the Grundfos CR 3-3 use?

This SKU ships with a 1/2 HP, 3-phase, 208-230/460 V NEMA TEFC motor on a 56C frame. Other motor configurations and IE3/IE5 upgrades are available on request.

Can the Grundfos CR 3-3 be paired with a variable frequency drive (VFD)?

Yes. Order the matching E-Pump variant with integrated MLE permanent-magnet motor, or pair this fixed-speed pump with a Grundfos CUE external VFD.

What is the typical lead time for the Grundfos CR 3-3?

Many configurations of the CR 3 series ship from stock through Grundfos USA. Contact ForeverPure Place for the current lead time on this specific material number (99916312).

Grundfos CR 3-3 1/2HP 3PH Pump | P/N 99916312

Description

Grundfos CR 3-3 — material number 99916312 — is a 3-stage Grundfos CR vertical multistage centrifugal pump with a 1/2 HP, 3-phase, 208-230/460 V NEMA TEFC motor and a HQQE shaft seal.

This 3-stage configuration produces a moderate 165 ft of head at the BEP (18 GPM, ~71 psi) and is the most common choice for low-rise commercial boosting and short pipe runs where modest pressure is needed.

Specifications

Model	CR 3-3
Stages	3
Flow at BEP	18 GPM
Head at BEP	165 ft (~71 psi)
Shutoff head (approx.)	198 ft
Motor	1/2 HP, 3-phase, 208-230/460 V, NEMA TEFC on 56C frame
Shaft seal	HQQE (SiC/Carbon EPDM)
Materials	Cast iron head/base; 304 SS chambers and impellers
Material number (P/N)	99916312
Shipping weight	52 lbs
Frequency	60 Hz
Brand	Grundfos
Country of origin	Denmark / USA (varies by date code)

Dimensions

Approximate dimensions (vertical pump)
Overall height (pump + motor)	31.9 in
Pump body height (3 stages)	19.9 in
Base height (stage 0)	14.5 in
Added height per stage	1.8 in
Motor frame	See spec table above
Mounting	Vertical foot-mounted
Motor orientation	Vertical with NEMA motor stool above pump head

Note: Dimensions are approximate and based on the Grundfos CR 3 data booklet. Exact dimensions vary slightly by motor frame and base style. For certified installation drawings of this specific material number, request a quote and we'll provide the official Grundfos dimensional drawing.

Pipe Connections

The Grundfos CR 3 series is available with multiple connection types to match your installation requirements. Connection sizes for this series:

Connection options
Standard pipe connection (oval flange)	1 inch NPT
ANSI flange size	1-1/4 inch
ANSI flange class	250 lb
Inlet / outlet orientation	Suction and discharge on the same horizontal centerline (in-line)

Companion connections (gaskets, bolts, ANSI flanges or Victaulic couplings) are ordered separately. Contact ForeverPure for the matched connection kit part numbers for your specific configuration.

Available Configurations / Material Numbers

The CR 3-3 ships in several phase, voltage, and seal combinations. Material numbers for the most common variants:

Phase / Voltage	Seal	Motor HP	Weight	Material Number
1-phase, 115/208-230	HQQE	1/2 HP	57 lbs	`99916247`
3-phase, 208-230/460	HQQE	1/2 HP	52 lbs	`99916312`
1-phase, 115/208-230	HQQV	1/2 HP	57 lbs	`99916261`
3-phase, 208-230/460	HQQV	1/2 HP	52 lbs	`99916326`
1-phase, 115/208-230	HQQE	1/2 HP	73 lbs	`99916275`
3-phase, 208-230/460	HQQE	1/2 HP	62 lbs	`99916340`
1-phase, 115/208-230	HQQV	1/2 HP	73 lbs	`99916294`
3-phase, 208-230/460	HQQV	1/2 HP	62 lbs	`99916358`

Typical Applications

Boiler feed water in industrial steam plants
Cooling tower makeup water
High-rise commercial pressure boosting
HVAC chilled water circulation
Fire protection jockey pump
Light industrial process water

Datasheet & Documentation

Frequently Asked Questions

What is the maximum head/flow of the Grundfos CR 3-3?: The CR 3-3 produces approximately 165 ft of head at 18 GPM (best efficiency point), with a shutoff head of about 198 ft. That corresponds to roughly 71 psi at the BEP.
What is the Grundfos CR 3-3 material number / part number?: The primary material number for this configuration (3-phase 208-230/460, HQQE seal) is 99916312. Other voltage and seal options are listed in the variants table on this page.
Which motor does the Grundfos CR 3-3 use?: This SKU ships with a 1/2 HP, 3-phase, 208-230/460 V NEMA TEFC motor on a 56C frame. Other motor configurations and IE3/IE5 upgrades are available on request.
Can the Grundfos CR 3-3 be paired with a variable frequency drive (VFD)?: Yes. Order the matching E-Pump variant with integrated MLE permanent-magnet motor, or pair this fixed-speed pump with a Grundfos CUE external VFD.
What is the typical lead time for the Grundfos CR 3-3?: Many configurations of the CR 3 series ship from stock through Grundfos USA. Contact ForeverPure Place for the current lead time on this specific material number (99916312).

Related Products

Need quotes, lead-time confirmation, or technical assistance? Contact ForeverPure Place — we'll price the exact configuration (99916312) and check current stock with Grundfos USA.