Hot Water Pumps

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Buying guide: Hot Water Pumps

Hot water pumps, also called hot water circulators, keep domestic hot water moving round a loop of pipework from the cylinder or water heater to the taps and back. This means hot water reaches outlets quickly instead of running cold first, and it helps keep the whole loop up to temperature. They are used on hot water systems in homes and in commercial buildings.

Materials and model codes

Pumps for domestic hot water have stainless steel or bronze housings, rather than the cast iron used for many heating circulators, so do not swap one type for the other. Some manufacturers use a model code that gives the port size in millimetres and the maximum head, with letters for the housing material and connection, for example N for stainless steel and F for flanged. Larger pumps have flanged connections, while smaller ones have threaded ports; check whether unions or flanges are included or need ordering separately. The pumps in this range run on a single-phase supply.

Choosing and controlling a pump

To replace a pump, match the port size, connection type, length and duty of the old one. A time switch can limit running to the hours when hot water is normally used, to cut energy use, and some pumps detect a thermal disinfection cycle. To control legionella, hot water should be stored at 60°C or more and reach at least 50°C at outlets within a minute of running, so the circulation loop must keep water hot. Pumps on drinking water must be suitable under the Water Supply (Water Fittings) Regulations 1999, and electrical connection should be made by a competent person.

For heating pumps and cylinders, see circulation pumps and cylinders and water heaters.

About Hot Water Pumps

BHL lists hot water pumps products within the Pumps range of our Heating & Plumbing department. Brands with products here include Grundfos and Pump House.

Brands

Brands with products in Hot Water Pumps at BHL include those listed below, each linked to its own brand page.

Finding products in Hot Water Pumps

Hot Water Pumps has no sub-categories: all of its products are listed on this page.

Brands with products in hot water pumps include Grundfos and Pump House, and each brand page linked on this page lists that maker's products at BHL.

Hot Water Pumps sits within Pumps alongside Circulation Pumps, Condensate Pumps and other sub-categories.

Hot Water Pumps FAQs

What does the Hot Water Pumps range at BHL include?

Products from the brands linked on this page.

Which brands appear in hot water pumps at BHL?

Brands with products here include Grundfos and Pump House. Each name links to the brand's own page.

How do I find a specific hot water pumps product?

Narrow the list first: the brand pages linked on this page each hold a smaller set of hot water pumps products, one manufacturer's.

Related categories

Back to Pumps, or continue to Circulation Pumps and Condensate Pumps.