Description
Product Summary
The Honeywell Residential THM5421R1021 is a circulator pump from Honeywell Residential, described by the manufacturer as: equipment interface module controls up to 4-Stages of heat and 2-Stages of cool in A heat pump system and up to 3-Stages of heat and 2-Stages of cool in A conventional system. three sets of universal.
A circulator pump moves heated or chilled water through a hydronic system. Circulators are matched by flow, head, horsepower, voltage, flange size and body material. Cast iron is used in closed heating loops; bronze or stainless steel is required for open and potable water systems. Replace a circulator that hums without pumping, leaks at the body or seals, runs hot or is noisy after air has been purged from the system.
Before you order, match THM5421R1021 to the part number on the part you are replacing or in your equipment's repair parts list, and confirm the voltage, size and connections match your equipment. If you are not sure which part your equipment needs, call us at 1.888.509.3391 with the model and serial number and we will confirm it for you.
Key Features
- Genuine Honeywell Residential part: Manufacturer part number THM5421R1021, factory new.
- Part type: Circulator Pump.
- Ready to ship: In stock with live quantities shown on this page.
Frequently Asked Questions
Is this a genuine Honeywell Residential part?
Yes. This is the Honeywell Residential THM5421R1021, a factory-new circulator pump from Honeywell Residential.
How do I make sure it fits my equipment?
Compare THM5421R1021 with the part number printed on the part you are replacing or listed in your equipment's repair parts list, and confirm the voltage and connections match. If you are not sure, call us at 1.888.509.3391 with your model and serial number and we will confirm it.
Can I use a cast iron circulator for domestic hot water?
No. Open systems that bring in fresh water need a bronze or stainless steel circulator to prevent corrosion.
Should a professional install this part?
Yes. Gas, electrical, hydronic and combustion components should be installed by a qualified technician who can test the system afterward and follow the codes that apply where you live.
