Water Heaters by Type

Find the ideal compact heating solution with our range of water heaters, including hand wash units and under sink water heaters. These electric hot water heaters are perfect for delivering instant hot water to small sinks in kitchens, bathrooms, workshops, and utility areas.

Choosing water heaters by type helps you quickly identify the right fit for your space and usage. Hand wash units are ideal for locations where space is limited and hygiene is a priority, such as garages or cloakrooms. Under sink water heaters, meanwhile, are discreet and highly efficient—perfect for providing hot water where a full central heating system isn’t practical.

All of our water heaters are electric, energy-efficient, and designed for easy installation. They deliver rapid heating performance while helping to reduce energy and water waste.

Shop for water heaters by type at Plumbworld and get FREE Delivery on top-quality electric hot water heaters.

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Triton Instaflow 1.5kW Electric Water Heater - 5L Stored

5.0

8 ratings

£112.96 inc
VAT

Save £4.24 | Was £117.20

Triton InstaFlow 5.4kW Electric Water Heater

5.0

1 rating

£127.20 inc
VAT

Save £12.42 | Was £139.62

Redring Powerstream 9.5kW Electric Water Heater - Instantaneous

4.9

15 ratings

£129.00 inc
VAT

Save £18.76 | Was £147.76

Triton Instaflow 2kW Electric Water Heater - 10L Stored

5.0

9 ratings

£130.56 inc
VAT

Triton Instaflow 2kW Electric Water Heater - 15L Stored

5.0

9 ratings

£140.47 inc
VAT

Save £4.49 | Was £144.96

Redring Powerstream 10.8kW Electric Water Heater - Instantaneous

5.0

4 ratings

£146.40 inc
VAT

Save £35.59 | Was £181.99

Triton InstaFlow 7.7kW Electric Water Heater

5.0

2 ratings

£147.76 inc
VAT

Save £27.24 | Was £175.00

Redring Powerstream 12kW Electric Water Heater - Instantaneous

4.9

9 ratings

£152.00 inc
VAT

Save £22.62 | Was £174.62

Triton InstaFlow 10.1kW Electric Water Heater

4.8

4 ratings

£178.43 inc
VAT

How do instantaneous and stored electric water heaters differ, and which is better for a small sink?

Instantaneous heaters warm water on demand and are rated by kW, so they give continuous hot water but need a higher electrical supply; they suit a busy kitchen or workshop tap. Stored heaters hold a small volume of hot water, so you get immediate hot water for short uses with lower electrical load, ideal for a cloakroom or occasional hand wash. For a tiny basin in a cloakroom, a 5-litre stored Triton unit is a simple, compact choice; for a kitchen sink where you want longer flow, a 9.5–12kW Redring instantaneous model will perform better.

How do I match kW or litre capacity to my usual use at the sink?

Use kW for instantaneous units and litres for stored ones: 1.5–2kW or 5-litre stored units are enough if you only need a quick hand wash; 5.4–7.7kW or 10-litre stored models suit a small kitchen where you occasionally fill a basin; 9.5–12kW instantaneous heaters are better if you want stronger flow or to run a spray tap. Think in practical terms, if you regularly wash up at one sink, aim for 7.7kW or a 10–15 litre stored unit; for occasional use, a compact 5-litre stored or 2kW instant will save space and power.

Will one of these heaters fit under my sink or in a cloakroom cupboard?

Check the product dimensions against your space: heights included in our range range roughly from 160mm to 406mm, widths from about 136mm to 385mm and depths from 72mm to 332mm. A compact under-sink heater with a 160mm height and 136–237mm width will tuck into a shallow cupboard or vanity unit, while larger stored 15-litre models need a taller gap. Measure the intended spot and allow clearance for pipework; a 160mm tall Triton stored unit will fit snugly in most cloakroom vanity cupboards.

Are these electric water heaters energy-efficient and will they help reduce water waste?

Yes, all models here are electric and designed for rapid heating to cut waiting time, which reduces wasted running water. Instantaneous units deliver hot water only when you open the tap so there's no tank standby loss, while small stored units (5–15 litres) limit standby losses compared with large cylinders. If you want minimal water waste at a cloakroom basin pick a small stored unit for instant hot taps, but for frequent or longer use the on-demand instantaneous models are the most efficient in practice.

How do the Triton and Redring ranges differ so I can choose the right brand?

Triton offers a broader mix of stored and instantaneous options, including compact 5, 10 and 15-litre stored heaters and mid-range kW instant models such as 5.4kW and 7.7kW, which makes them versatile for hand wash units and under-sink installations. Redring focuses on higher-power instantaneous models (9.5kW, 10.8kW and 12kW) that suit kitchens or workshops needing stronger flow. Both brands carry excellent customer ratings here, so if you need a compact stored solution go Triton; if you need sustained hot flow from a tap choose a Redring instantaneous unit.

Filter By 9 results

Filter By 9 results

How do instantaneous and stored electric water heaters differ, and which is better for a small sink?

How do I match kW or litre capacity to my usual use at the sink?

Will one of these heaters fit under my sink or in a cloakroom cupboard?

Are these electric water heaters energy-efficient and will they help reduce water waste?

How do the Triton and Redring ranges differ so I can choose the right brand?

Filter By
9 results

Filter By
9 results