Grundfos MAGNA1 25-80 threaded circulator pump — view 1
Grundfos MAGNA1 25-80 threaded circulator pump — view 2
Grundfos MAGNA1 25-80 threaded circulator pump — view 3

Grundfos MAGNA1 circulator pump, threaded 180 mm, for heating

Model
Regular price €1.300,36 Sale price€876,74
/
Tax included. Shipping calculated at checkout.

  • 5 in stock
  • Backordered, shipping soon

At Q-TECH, we apply the same clear rules for everyone: the law protects you, and when applied correctly, it protects us as well. By processing your purchase, you accept our General Terms and Conditions of Sale. If you are purchasing as a consumer (B2C), nothing stated herein limits the rights granted to you by mandatory law (RDL 1/2007, TRLGDCU): the 3-year legal warranty of conformity and the right of withdrawal under the terms and with the exceptions legally provided, which are detailed below. References to "B2B" apply only to businesses and professionals.

Your guarantees

  • Rights intact: 14 days of withdrawal from receipt for most products—subject to the legal exceptions you will see below, such as goods made to your specifications—and a 3-year legal warranty of conformity, under the terms of the TRLGDCU.
  • Conformity with the description: we guarantee that the equipment will correspond to the published technical description and what one could reasonably expect from it (arts. 115 et seq. TRLGDCU). Images and videos are for guidance only: the manufacturer may supply a more recent revision of the product or introduce minor aesthetic, packaging, or firmware changes, without this constituting a lack of conformity as long as the described characteristics and performance are maintained.
  • Traceability that also protects you: we document the condition, serial number, and seal of each piece of equipment upon shipment, and we video-record the opening of returns; this is your proof of the condition in which the goods were delivered.

Responsible use and your part

  • If you are thinking of returning it, keep it as you received it: without installing or activating it, with its seals, accessories, and packaging intact. This is how to ensure a full refund, without deductions.
  • Handling that exceeds inspection reduces value: handling the equipment beyond what is necessary to verify its nature and operation may result in a real, assessed, and case-by-case justified deduction (art. 108.2 TRLGDCU), never a fixed percentage. In particular: activating or registering the serial number, linking it to a manufacturer's account or app, circulating water through hydraulic equipment, unsealing probes, or installing software or consumables. Initial inspection of the product does not lead to a deduction.
  • The same item must be returned: withdrawal requires returning the supplied unit. Different equipment, or equipment with prior use, age, or wear prior to purchase, does not constitute a valid withdrawal.
  • Installation and cybersecurity, shared responsibility: this is technical hardware; you are responsible for correct installation, credentials, patches, and backups, while we deliver a compliant product. Q-TECH is not liable for damages resulting from poor installation, incorrect configuration, or omission of patches by the customer or third parties (in B2C, without prejudice to the legal warranty and liability for intent or negligence, arts. 86 and 130 TRLGDCU).
  • Delivery of bulky goods: delivery is made to the curb. B2C: transport risk is ours until physical delivery (art. 66 ter); we recommend noting visible damages on the delivery note and notifying us of breakages within 24-48 hours with photographs to activate the insurance. B2B: inspection and notation on the delivery note are mandatory; hidden damages must be reported within 24 hours (art. 366 CCom). Unjustified rejection or incorrect shipping information will entail the actual outbound and return costs (approx. €85-550 for heavy machinery).

Made to your measure (Advanced Pre-Assembly)

  • If your order includes equipment, racks, hydraulic assemblies, or technical rooms made or configured according to your specifications (permanent joints, custom cuts or wiring, parameterization, pressure testing), these are custom goods without the right of withdrawal from the conclusion of the contract (art. 103.c TRLGDCU; CJEU Case C-529/19), which is informed before purchasing and documented in the signed Order Note. A test you request without permanent modification retains your right of withdrawal, with only the actual loss of value caused by that test being deducted. Would you prefer to receive it tested, configured, and ready to connect, without assuming these risks? Contract our Advanced Pre-Assembly or the prior technical audit.

If you are purchasing as a business or professional (B2B)

  • The transaction is governed by the Commercial Code: firm sale, without the right of withdrawal; notification of defects within 4 days (apparent) / 30 days (hidden), arts. 336 and 342. Q-TECH acts as a distributor and excludes indirect damages, loss of profit, and data loss, limited to the price of the equipment, without prejudice to the manufacturer's commercial warranty.

Product warnings v1.0 · June 2026. Information summary; the complete and binding conditions are those published at q-tech.es.

Canned-rotor circulator to replace 180 mm heating pumps

The Grundfos MAGNA1 is an electronic circulator pump for heating, cooling and other closed circuits. It offers three control modes, selected from its control panel. We stock eight threaded models, from 6 to 12 m maximum head, shipped from our warehouse.

Summary

UseHeating, cooling and air conditioning, geothermal and solar thermal systems
ControlProportional pressure, constant pressure and constant curve
Models25-60 to 25-120 with G 1½ thread and 32-60 to 32-120 with G 2 thread
Port-to-port length180 mm
Maximum head6 to 12 m depending on model
Maximum pressure10 bar (PN 10)
Power supplySingle-phase 230 V
AvailabilityShipped from the Q-Tech warehouse
Q-Tech installationTécnico Experto on-site by the hour

What is the Grundfos MAGNA1?

The Grundfos MAGNA1 is a canned-rotor circulator pump: pump and motor form a single unit with no shaft seal. The bearings are lubricated by the pumped liquid. Grundfos states that it is maintenance-free and that the motor needs no external protection.

What problem does it solve?

Many heating systems still run old fixed-speed circulators with a 180 mm port-to-port length. The MAGNA1 keeps that length and thread, so it fits the same space. Grundfos states that the whole range complies with the 2013 and 2015 Energy-related Products Directive requirements.

Proportional pressure mode adapts the pump to the flow the circuit demands. Eight light fields show the selected setting. Single-head pumps for heating come with an insulating shell.

Technical data

BrandGrundfos
RangeMAGNA1
TypeElectronic canned-rotor circulator pump
Voltage1 × 230 V ±10%, 50 or 60 Hz
Enclosure classIPX4D
Insulation classF
Noise level43 dB(A) maximum
Liquid temperature−10 to 110 °C
Ambient temperature0 to 40 °C
Maximum operating pressure10 bar (PN 10)
Port-to-port length180 mm
Pump housingCast iron
Motor protectionBuilt-in, no external protection required

Models and data by variant

ModelThreadMax. headPower input P1Max. current
25-60 180G 1½6 m9 to 92 W0.74 A
25-80 180G 1½8 m9 to 128 W1.03 A
25-100 180G 1½10 m9 to 176 W1.42 A
25-120 180G 1½12 m8 to 188 W1.51 A
32-60 180G 26 m9 to 111 W0.90 A
32-80 180G 28 m9 to 151 W1.22 A
32-100 180G 210 m8 to 175 W1.41 A
32-120 180G 212 mAsk usAsk us

Compatibility and limits

  • Clean, non-aggressive liquids with no solid particles or fibres.
  • Water and glycol mixtures up to 50%. Grundfos states that they reduce hydraulic performance.
  • Maximum altitude of 2,000 m above sea level.
  • Minimum inlet pressure with the liquid at 95 °C: 0.35 bar.
  • Not suitable for flammable liquids, acids or seawater.

When this product is not the right choice

  • If you need advanced control or communication with the building management system: see the Grundfos MAGNA3.
  • For homes with radiators or underfloor heating and low head: see the Grundfos ALPHA2 GO.
  • For domestic hot water (DHW) recirculation: our MAGNA1 pumps are cast iron. See the stainless steel Grundfos UPS-N.

Frequently asked questions

Which model do I need?

The first number is the thread: 25 is G 1½ and 32 is G 2. The second is the maximum head in decimetres: 80 means 8 m. All models are 180 mm port-to-port.

Can it replace an old pump?

Yes, if the thread and the 180 mm port-to-port length match. Send us a photo of your current pump's nameplate on WhatsApp and we will tell you the model.

Is it suitable for domestic hot water?

Grundfos offers a stainless steel version for DHW. The pumps we sell are cast iron, for closed circuits.

Does Grundfos still manufacture the MAGNA1?

Grundfos lists it as discontinued on its website. We supply the units available in our warehouse. For new projects, see the MAGNA3.

What is the delivery time?

It ships from our warehouse. We confirm the delivery date with your order.

Q-Tech installation and support

Q-Tech replaces circulator pumps in plant rooms and heating circuits in Málaga. You can book a Técnico Experto on-site by the hour or a Técnico Experto technical call. To choose a model, message us on WhatsApp at +34 690 95 38 39.

Documentation

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