Grundfos Magna1 50-120 F Circulator Pump 240V 99221336 #4782/98 USED

GRUNDFOS MAGNA1 50-120 F – Circulator Pump 240V (99221336) #4782/98 (USED)

This listing is for a Grundfos MAGNA1 high-efficiency wet-rotor circulator pump. MAGNA1 is designed as a simple, reliable and maintenance-free solution for heating and cooling circulation where basic control and monitoring functions are all that’s required.

The pump incorporates a permanent-magnet synchronous motor with an integrated frequency converter, providing significantly better energy efficiency than older fixed-speed pumps while complying with current EuP energy requirements. It can be monitored and set up using the on-pump interface and supports wireless interaction with the Grundfos GO Remote app.

Condition: supplied as a used pump. The unit shows cosmetic wear consistent with previous service use. It is inspected prior to dispatch and confirmed operational.
Guarantee: supplied with our 6-month guarantee.

• Pump type: MAGNA1 wet-rotor circulator
• Connection: DN50 flanged (PN6/10)
• Port-to-port length: 280 mm
• Electrical supply: 1 × 230–240 V, 50 / 60 Hz
• Motor: permanent-magnet synchronous (PM)
• Control: integrated frequency converter
• Communication: Grundfos GO Remote compatible

Need help confirming suitability?
Call us on 01803 220416 for technical advice.

Manufacturer product page

Full technical specifications and performance curves can be viewed on the official Grundfos product page:
View Grundfos MAGNA1 50-120 F (99221336) – Variant details

Frequently Asked Questions

Why choose a MAGNA1 instead of a MAGNA3?

The MAGNA1 is intended for users who need a high-efficiency, reliable circulator without advanced BMS features. Compared with MAGNA3:

• MAGNA1 offers simpler setup and operation with lower cost
• Ideal where only basic control modes are required
• Still provides major energy savings via PM motor and integrated drive
• Includes fault relay and digital start/stop input

Choose MAGNA3 when you need:

• Advanced flow estimation and heat-energy monitoring
• Full building management communication (BACnet/LON)
• Multi-pump cascade and advanced control functions

For straightforward HVAC circulation where simplicity and efficiency are the priority, MAGNA1 is usually the better value choice.

Is the pump maintenance-free?

Yes. MAGNA1’s wet-rotor design with no mechanical shaft seal significantly reduces routine maintenance and delivers very quiet operation.

Can this replace older fixed-speed pumps?

Yes — subject to hydraulic and connection match. The variable-speed electronics in a MAGNA1 can deliver significant energy savings compared with older fixed-speed circulators, but system duty and connection type should be confirmed before replacement.

About Our Stock

Stock code: #4782/98
We specialise in supplying quality pumps and equipment. This unit is supplied as a used pump, inspected prior to dispatch and supplied with a 6-month guarantee.