Under Sink Water Heaters and Over Sink Water Heaters
Under and over sink water heaters are types of instant water heaters that are designed to fit neatly above or below your sink.
An over sink water heater is ideal for various applications, offering different sizes and capacities to suit your needs.
These heaters are a quick and efficient way to get hot water whenever you need it. Energy efficient and compact, they are perfect for areas with limited space.
Over sink water heaters are easy to install and require no extra plumbing.
Shop under sink water heaters and over sink water heaters from leading UK market brands and get free UK delivery on orders over £50 (excluding VAT).

2kW Oversink Water Heater, 5l, 35°C - 85°C, White, IP24D

2kW Water Heater, 5l, 230V, IP24D, White

Oversink Storage Water Heater, 15l, White
FAQs
Why do people use water heaters?
Space-saving: Over sink water heaters are compact and designed for small spaces, making them ideal for areas with limited room, such as small kitchens or bathrooms. Boilers, on the other hand, require more space and are often bulkier.
Energy efficiency: Over sink water heaters provide hot water on demand, which means the water is heated only when needed, reducing energy wastage. Boilers, especially traditional ones, tend to heat and store large amounts of water even when it’s not in use, leading to higher energy consumption.
Immediate hot water: These heaters deliver instant hot water without waiting, making them convenient for quick tasks like handwashing or dishwashing. Boilers may take longer to produce hot water, especially in larger systems.
Choosing the right water heater can greatly enhance comfort and convenience in both home and business settings.
Homeowners who need hot water for daily activities such as showers, washing dishes, and cleaning.
Small businesses such as cafes, hair salons, and office spaces where hot water is needed for various tasks.
Commercial establishments like hotels, restaurants, and laundromats that require large amounts of hot water for customers and staff.
Industrial sectors that need hot water for cleaning, processing, or other specific operations.
Property managers who oversee apartment complexes, ensuring all units have access to hot water.
Hospitals and healthcare facilities that need hot water for sanitation and patient care.
What is an electrical water heater?
These small, instant water heaters are designed to provide hot water directly to small sinks or wash basins.
These heaters are typically installed under the sink, or over the sink, where they are easily hidden, making them perfect for small kitchens or offices.
Oversink water heaters, in particular, are convenient electric water heating solutions that can be installed directly above a sink or basin, emphasizing ease of installation and minimal maintenance requirements.
Electric water heaters are especially practical in settings that require immediate production of hot water.
Are instant water heaters easy to install?
You’ll require a source of cold water and an electricity supply when installing your water heater, so it’s best to speak to your electrician about installation.
Oversink water heaters are particularly convenient due to their ease of installation directly above a sink or basin.
However, they can usually be installed into new or existing plumbing systems with little modification, with many of our models offering quick and easy replacement of older appliances thanks to their universal wall mounting bracket.
How does a water heater work?
A water heater quickly heats water as it flows through the unit, providing instant hot water without the need for a large storage tank.
Many models also come with safety features to ensure secure operation and protect against potential hazards.
They often feature an electronic control to deliver precise temperatures or adjustable thermostats to boost energy efficient heating.
What is the difference between over sink and under sink?
The key difference here is their installation location. Undersink water heaters are hidden beneath the sink, ideal for small sinks and compact spaces.
Over sink units are mounted above the sink, making them more visible but are usually easier to access for maintenance.
Both types of water heaters offer the convenience of instant hot water and significant power savings due to on-demand heating, as well as excellent temperature control features.
What are the benefits of having an under or over sink water heater?
Oversink water heaters are a popular choice for smaller households and businesses due to their convenience and suitability for various applications, including: Many trusted brands offer under and over sink water heaters, ensuring reliability and efficiency for your home or business.
Save space in small areas
Oversink water heaters are particularly useful above sinks where space is limited, making them perfect for small bathrooms, kitchens or office breakout spaces.
Check our current stock to find the perfect model for your needs.
Energy cost saving
Instant water heaters only heat water when needed, reducing energy consumption when compared to traditional tank heaters. The water is heated on demand, which could save costs on energy bills over time, too.
Instant hot water
No more waiting around for the water to heat! Under sink water heaters are convenient and heat water on demand, minimising water wastage too. Their capacities are perfect for commercial and residential settings alike.
Find your perfect undersink water heater or over sink water heater online or visit your nearest YESSS Electrical store to shop in-person.