Do Any Washing Machines Still Have a Hot Water Valve?
Do Any Washing Machines Still Have a Hot Water Valve?
Many people — particularly those with solar thermal systems or an existing hot water supply — want a washing machine that can connect to hot water. Here is the honest picture of what is available, why hot-fill machines have largely disappeared, and whether they would benefit you in practice.
Hot and cold fill washing machines are extremely rare in 2025. Almost all modern washing machines are cold-fill only, heating water internally. A small number of specialist models — including some from Ebac — offer dual inlets, but even these only draw hot water on high-temperature programmes. For most households, a cold-fill machine is more efficient and more practical.
Why Did Hot and Cold Fill Washing Machines Disappear?
Older washing machines routinely had both hot and cold water connections, allowing them to draw pre-heated water from the household system. Over time, manufacturers moved almost universally to cold-fill only designs. This was not an arbitrary decision — there are several well-founded technical and practical reasons.
Modern machines use far less water
Contemporary washing machines use significantly less water per cycle than older models. Because the volumes involved are relatively small, heating that water internally using the machine’s own element is often more efficient than drawing it from a domestic hot water system — where much of the heat is lost through pipework before it even reaches the appliance.
Precise temperature control requires internal heating
Most everyday wash cycles now run at 30°C or 40°C, where precise temperature control is important for fabric care and detergent performance. When a machine draws hot water from an external supply, it has no reliable way to control the exact inlet temperature. Internal heaters allow the machine to reach and maintain the correct temperature accurately — improving both wash results and garment care.
Domestic hot water is often too hot — or too cool
Hot water stored in cylinders typically arrives at temperatures well above what most wash cycles require. Mixing this with cold water externally is inefficient and imprecise. With combi boilers — now the most common heating system in UK homes — drawing small volumes of hot water is particularly inefficient, as the boiler must fire up to deliver it.
Simpler installation and global standardisation
A single cold water connection reduces plumbing complexity, lowers the risk of incorrect installation, and makes machines easier to install in a wider range of property types. It also allows manufacturers to produce appliances that work across multiple global markets, many of which do not use domestic hot water systems in the same way as the UK.
Energy efficiency standards are built around cold-fill
UK and EU energy labelling regulations measure and rate washing machine efficiency based on cold-fill operation. Manufacturers optimise their designs to perform well against these standards. Hot-fill capability sits outside this framework and offers no commercial benefit in terms of energy ratings.
Are There Any Hot and Cold Fill Machines Available?
Yes — but they are very rare. As of 2025, the options are limited:
🏭 Ebac
UK manufacturer Ebac produces washing machines with “intelligent hot fill” technology, specifically designed to draw hot water from a connected supply. These are among the very few mainstream options available with genuine dual-inlet support.
🏢 Commercial machines
Some commercial or semi-commercial laundry machines offer hot and cold connections. However, these are designed for institutional use and are not practical for domestic installation in most homes.
⚠️ Budget or niche brands
Occasional models from budget or niche manufacturers have appeared with dual inlets, but availability is inconsistent and these models can be difficult to source or support with spare parts.
🔍 Check before buying
The market changes frequently. If a hot-fill machine is important to you, check current availability carefully — and confirm whether the model genuinely uses the hot supply at the temperatures you regularly wash at.
Is a Hot Fill Machine More Energy Efficient?
This is the question most people are really asking — and the answer depends heavily on your specific hot water setup.
| Hot water source | Hot fill likely to help? |
|---|---|
| Solar thermal system with large, well-insulated cylinder | Possibly — particularly for high-temperature washes |
| Combi boiler (most common UK setup) | Unlikely — firing the boiler for small volumes is inefficient |
| Hot water cylinder (stored hot water) | Marginal — heat lost in pipework often negates the benefit |
| Heat pump hot water system | Potentially beneficial — worth investigating for high-use households |
For the majority of UK households with a combi boiler, a cold-fill machine heating water internally is likely to be more efficient — not less. The assumption that using existing hot water must be more efficient does not hold in most real-world setups.
Read our detailed comparison of cold fill vs hot fill washing machines for a full breakdown of the efficiency arguments.
Can You Connect Hot Water to a Cold-Fill Machine?
Modern cold-fill washing machines are engineered to receive a cold water supply. Connecting a hot water supply to a cold-fill inlet can damage internal components not rated for high inlet temperatures, interfere with temperature sensors and programme logic, void the manufacturer’s warranty, and in some cases create safety risks. Manufacturers explicitly advise against this practice.
If you previously had a hot and cold fill machine and are looking to replicate that setup with a modern appliance, the only safe approach is to select a machine specifically designed for dual-inlet use — such as those from Ebac.
When Does a Hot Fill Machine Actually Make Sense?
✅ Hot fill is worth considering if…
You have a solar thermal system generating low-cost hot water, your hot water is delivered instantly with minimal pipe heat loss, or you regularly run 60°C or higher wash cycles where the hot inlet would actually be used.
❌ Hot fill is unlikely to help if…
You have a combi boiler, you mainly wash at 30°C or 40°C, your hot water cylinder is some distance from the machine, or you are hoping for significant energy savings from everyday household laundry.
What About Hard Water Areas?
One argument sometimes made in favour of hot-fill machines is that they reduce limescale build-up, because pre-heated water from an external cylinder may have already deposited some of its scale elsewhere in the system.
In practice, limescale management in a cold-fill machine is more effectively handled through regular use of a quality descaler or water softener product. Read our guide on limescale in washing machines for practical advice on protecting your appliance in hard water areas.
Frequently Asked Questions
Can I still buy a washing machine with a hot and cold water connection?
Yes, but options are very limited. Ebac is the most notable UK manufacturer currently offering machines with genuine hot-fill capability. Some budget or niche brands occasionally offer dual inlets, but availability is inconsistent. Always confirm whether the machine uses the hot supply at the temperatures you actually wash at — many only draw hot water at 60°C or above.
Why don’t modern washing machines have a hot fill?
Modern machines use far less water than older models, making internal heating more efficient than drawing from a domestic supply in most cases. Precise temperature control at 30°C and 40°C also requires internal heating. Energy efficiency standards, global manufacturing, and simpler installation have all driven the shift to cold-fill only designs. Read more in our guide on cold fill washing machines.
Is it safe to connect hot water to a cold-fill washing machine?
No. Cold-fill machines are not designed to receive a hot water supply. Doing so can damage internal components, interfere with temperature sensors, void the warranty, and potentially create safety risks. Manufacturers explicitly advise against this. If you need a machine that connects to hot water, only use an appliance specifically designed for dual-inlet use.
I have solar panels — would a hot fill machine save me money?
Potentially, if you have a solar thermal system generating low-cost hot water that is stored efficiently and delivered to the machine with minimal heat loss. However, the benefit is limited to programmes running at 60°C or above — everyday 30°C and 40°C washes will still use the internal heater regardless. Whether the saving is meaningful depends on your specific setup and how often you run high-temperature cycles.
I had a hot and cold fill machine for years — why can’t I find a replacement?
The market has moved almost entirely to cold-fill only machines over the past two decades. Manufacturers phased out dual inlets as modern detergent chemistry, reduced water volumes, and energy efficiency standards made internal heating the more practical and efficient approach. Replacement options are genuinely limited — Ebac is currently the most practical choice for a like-for-like replacement in the UK. See our washing machine buying guide for broader advice on choosing a new machine.
Does a hot fill machine reduce limescale?
There is some argument that pre-heated water has already deposited scale elsewhere in the system, potentially reducing build-up in the machine. In practice, limescale management in a cold-fill machine is more reliably achieved through regular descaling. Read our guide on limescale in washing machines for practical advice.
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Last reviewed: April 2025
Hi, I have been on the website looking at the Miele commercial hot and cold fill washing machines only to find they are still “reduced water intake ” Is it possible to get a commercial one with the old intake of water. I don’t need a commercial but they seem to be the only machines with hot and cold fill. My reason for wanting hot and cold fill is to get a machine that gives more water. but it seems even these are reduced water, wrapped up as ” economical,”
I’m in a hard water area. If any appliance has to heat up any water it uses, it will have limescale problems and therefore seriously deplete the the lifespan of the machine or cause extra expense and pollution by having to add water softeners. I was lucky to have a hot and cold intake machine that lasted 15 years. It eventually died (no parts available to replace) early this year. I managed to find a machine that has a ceramic coating on the heating element (clearance sale) but I seriously doubt the machine will last as long or that they are still available to buy. I agree with Paul Kirwan we want choice not swayed opinion; that’s like forcing a democratic country to accept the ideology of a dictatorship. Result duel input or rebellion !!!!