Domestic Hot Water Pumps

Circulation pumps for hot water circulation in residential and commercial buildings

How to choose a domestic hot water circulation pump?

A domestic hot water circulation pump keeps hot water moving through the pipes, so hot water comes from the tap instantly — without wasting water and time waiting. The right choice depends on the size of the home, the pipe lengths and whether the house has a dedicated return line or not.

For houses and apartments the best choice is the COMFORT series — COMFORT with AUTOADAPT learns your household's hot water habits and only runs when hot water is likely needed, keeping electricity and heat loss to a minimum. If the house has no return line, COMFORT BX with a thermal bypass valve installed at the furthest tap solves it.

In a classic system with a return line, the stainless-steel UPS(N) does the job — it is made specifically for domestic hot water, because a standard cast-iron pump would rust in drinking water. The ALPHA1 and ALPHA2 models are also available with the same N housing, adjusting their output automatically and using noticeably less electricity.

For larger buildings — apartment blocks, hotels, sports centres — where circulation lines are long and flows large, MAGNA1 and MAGNA3 are the right choices, keeping pressure and temperature even across the building. And if a hot tap simply lacks pressure, the compact UPA booster pump adds it.

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Hot water circulation pump prices

The price depends on the series and capacity. Below are the price ranges of our selection with a recommendation on when each series fits best.

SeriesBest forPrice range
Grundfos COMFORTinstant hot water at the tap — houses and apartments€145–278
Grundfos UPAcompact booster pump for a tap or water heater€156–299
UPS(N)classic stainless circulator for systems with a return line€276–859
Grundfos ALPHA1 Nenergy-saving circulator for a smaller home€376–488
Grundfos ALPHA2 Ntop model with AUTOADAPT control for houses€496–863
Grundfos MAGNA1apartment blocks and commercial buildings — long circuits€432–1515
Grundfos MAGNA3top model for large buildings — FLOWADAPT and controls€534–2456

Frequently asked questions

What is the difference between a heating circulator and a hot water circulator?+
A heating circulator moves water around radiators or underfloor heating and may have a cast-iron housing. A domestic hot water circulator is in contact with drinking water, so its housing must be stainless steel (the N models) — for example UPS(N), ALPHA1 N or COMFORT. A cast-iron pump must not be used for domestic hot water, as the water would start to rust.
Which is the best hot water circulation pump for a house?+
For most houses the best choice is COMFORT with AUTOADAPT — the pump learns when hot water is typically used and only runs then, so hot water is instant at the tap without the pump running needlessly. If there is no return line, choose COMFORT BX with a thermal bypass valve.
How much does a hot water circulation pump cost?+
In our range prices start at €145 (COMFORT 15-14 M) and a typical house solution stays within €145–278. The stainless UPS(N) costs €276–859, the ALPHA models €376–863 and the MAGNA ranges for large buildings €432 to €2456.
How much energy does a circulation pump save?+
Without a circulator, tens of litres of cooled water are poured down the drain every day while waiting for hot water — wasted water and heating energy. COMFORT with AUTOADAPT uses only a few watts and runs only when needed, so its annual electricity cost is just a few euros.
Does the pump work if the house has no return line?+
Yes — in that case choose the COMFORT BX variant, installed with a thermal bypass valve at the furthest tap. The valve lets hot water push back along the cold line until it reaches the tap, so no separate return pipe needs to be built.
When should I look at UPS(N), ALPHA or MAGNA?+
If the house already has a return line and you want a simple, reliable solution, UPS(N) is a good choice. ALPHA1 N and ALPHA2 N adjust their output automatically and save electricity. MAGNA1 and MAGNA3 are meant for apartment blocks, hotels and other large buildings with long circulation lines.