A Grundfos CM1-2 booster pump is worth considering when the job calls for a compact horizontal pump and its performance curve matches the required flow and pressure. The important buying decision is the exact configuration, including the motor, materials and control arrangement.
The Grundfos CM1-2 97568208 at ePumps is listed as a cast-iron, single-phase horizontal multistage pump for pressure boosting and water circulation. This guide explains what to check before adding it to a replacement project or new installation.
Where the CM pump fits
The horizontal layout can suit equipment rooms where a tall vertical pump is inconvenient. That makes the CM family worth reviewing for a compact booster installation, but installation space alone cannot establish whether this particular model will do the job.
Start with the water service and required duty. A pressure-boosting pump adds energy to water available at its inlet; it cannot correct a blocked supply pipe or create a missing water source. Have the installer investigate the reason for inadequate pressure before selecting equipment.
October can be a useful time to finish planned indoor pump work before colder weather complicates access and exposes unprotected outdoor piping. The reason to buy remains the measured requirement, not the season.
Match pressure at the flow you need
A useful request specifies how much water must move and the pressure required while that water is flowing. A pressure reading taken when no fixtures or equipment are using water does not describe the whole operating condition.
Ask the installer to account for incoming pressure, elevation changes and losses through pipes, valves and treatment equipment. Use those conditions to compare the proposed duty with the CM1-2 curve. Maximum head and maximum flow are different ends of the curve; they are not delivered together.
For example, a site needing a modest pressure increase with one outlet operating has a different requirement from a site feeding several simultaneous users. Give ePumps the expected operating range rather than selecting from horsepower alone. If the CM1-2 does not cover that duty, compare other horizontal multistage pressure pumps.
Review the listed configuration
The 97568208 listing identifies a 3/4 HP, single-phase, cast-iron model with 1-inch suction and discharge connections. These are useful starting points for checking the equipment arrangement. Confirm the supplied product's current electrical data and connection specification before purchase.
The exact product number matters because the CM1-2 family includes different constructions and motor configurations. A photograph or the short model name does not identify every component. If you are replacing an existing unit, provide clear pump and motor nameplate photos with your inquiry.
Choose materials for the actual liquid
Cast iron is a material choice, not a universal approval for every water service. Describe the liquid, operating temperature and any chemical treatment. Have the installer confirm the wetted materials and seal compatibility for those conditions.
If the installation supplies drinking water, confirm the required approvals for the specific product and project. Do not assume that an approval associated with another CM1-2 variant also applies to 97568208. Browse the Grundfos pumps collection when a different construction is needed.
Include controls and inlet requirements
The pump and the finished booster system are separate purchase decisions. Ask which controls, sensors, protection devices and plumbing accessories are included, and which must be specified separately. A bare pump listing does not establish automatic constant-pressure operation.
The standard CM pumps described in Grundfos' North American data booklet are non-self-priming. Confirm the exact version and approved inlet arrangement; do not assume it can lift water from below the pump simply because it is called a booster. The installer should verify priming, inlet conditions and the required protection before commissioning.
Make the quote useful
Send ePumps the model or product number, required flow and pressure, inlet conditions, liquid temperature, electrical supply and installation dimensions. Include whether the purchase is a complete new system or a replacement that must work with existing controls.
Ask for a quote covering the pump and the necessary components together. Confirm availability and delivery requirements before booking the installation, especially when the existing system must remain in service.
Ready to compare the CM1-2 with your application? Review model 97568208, then call ePumps at (844) 378-6771 with your duty and installation details. Request the configuration and current pricing for the equipment you actually need.
Frequently asked questions
Is the Grundfos CM pump a complete constant pressure booster system?
Not necessarily. Confirm whether the quoted package includes the controls, sensors and other components required for the intended operation. The pump model alone does not establish those features.
Can I choose a CM pump by horsepower alone?
No. Match required flow and pressure to the correct product curve, then confirm materials, electrical supply, inlet conditions and controls.
Is every Grundfos CM pump made from the same materials?
No. CM1-2 variants differ. Use the full product number and current documentation to confirm the supplied construction and seal materials.
