Whitegoods Help article

Can a hot and cold fill washing machine be connected to cold only?

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Quick Answer

A hot and cold fill washing machine can be connected to a cold water supply only using a Y-piece connector. This splits the single cold supply into two feeds – one for each inlet valve. The machine will not know there is no hot supply; it will simply heat the cold water to the correct temperature. Without a Y-piece, leaving the hot inlet valve unconnected can cause some wash cycles to fail or abort with an error code.

What a Y-Piece Connector Does

A Y-piece connector is a small plastic fitting shaped like the letter Y. It screws onto a single water supply tap and provides two outlets – allowing two fill hoses to be connected to one tap. For a hot and cold fill washing machine connected to only a cold supply, the Y-piece allows both the hot and cold inlet valves on the machine to receive water from the single cold tap.

The machine does not know the water coming into both valves is cold. It will operate normally on all wash cycles and heat the water to the correct temperature using its own heating element.

How to Connect Using a Y-Piece

  1. Connect the single stem of the Y-piece to the cold water tap.

    The cold (blue) tap is the correct connection. Do not use the hot tap – connect only to cold. Screw the Y-piece fitting onto the tap outlet.

  2. Connect both washing machine fill hoses to the two outlets of the Y-piece.

    The two branches of the Y feed both the hot and cold inlet valves on the back of the machine. Both are now receiving cold water from the same cold tap. Check the rubber seals are in place at each connection.

  3. Turn on the cold tap fully and check for leaks at all connections.

    Tighten by hand until firm. Do not overtighten with tools. Run a short programme and check the Y-piece connections during filling.

Y-piece connectors are widely available

Y-piece hose splitters for washing machine fill hoses are available at plumbing merchants, DIY stores, and online. They are inexpensive and straightforward to fit without any plumbing knowledge.

What Happens If You Leave the Hot Inlet Unconnected

If only the cold fill hose is connected and the hot inlet valve is left without a supply, some wash programmes may fail. This is because on some hot and cold fill machines, certain cycles – particularly higher temperature programmes – are designed to fill via the hot valve only. With no water supply to that valve, the machine times out on fill and displays an error code or aborts the cycle.

✅ What may work with only cold connected

Lower temperature programmes (30 and 40 degrees) that fill via the cold valve may work normally. If only a limited number of cycles are used and none rely on hot-only fill, the machine may be usable without a Y-piece. Testing a rinse and spin cycle first is a low-risk way to check before committing to full washes.

❌ What will likely fail

Higher temperature cycles (60 and 90 degrees) often fill via the hot valve only on hot and cold fill machines. These will abort or produce an error code without a supply to the hot inlet. The full programme list cannot be used reliably without connecting both valves.

Does a Cold-Only Connection Affect Energy Use?

Using a Y-piece to supply cold water to both inlets means the machine heats all the water itself using its element, rather than drawing some pre-heated water from the hot supply. This may use slightly more electricity per cycle, but the difference is modest. Modern washing machines use relatively small amounts of water per cycle, and much of the energy saving from a hot fill comes from the heating of wash water rather than rinse water.

For a detailed comparison see our guides on cold fill versus hot and cold fill washing machines and whether a hot and cold fill machine is more economical.


Frequently Asked Questions

Can I connect a hot and cold fill washing machine to cold water only?

Yes, using a Y-piece connector. This splits the cold supply into two feeds for both inlet valves. The machine will not know the water is cold on both sides and will simply heat it to the correct temperature. Without a Y-piece, leaving the hot inlet unconnected risks some cycles failing or producing an error code.

What is a Y-piece connector for a washing machine?

A Y-piece (or hose splitter) is a small plastic fitting that connects to a single water tap and provides two outlet connections. It allows two fill hoses to draw from one tap – useful when connecting a hot and cold fill washing machine to a single cold water supply.

Will leaving the hot inlet unconnected damage the washing machine?

It will not necessarily cause damage, but some wash cycles will fail or abort. Cycles designed to fill via the hot valve will produce an error code or not complete. The machine should be used with both valves connected – either via a Y-piece to a single cold supply, or with each hose connected to its correct hot and cold tap.

Last reviewed: April 2026.

Discussion

67 Comments

Grouped into 48 comment threads.

Sarah 0 replies Fantastic - thanks so much. Will try again and give it a bit longer this time.

Fantastic – thanks so much. Will try again and give it a bit longer this time.

Sarah 1 reply Hi - we recently moved house and have the problem highlighted here ie only a cold water feed to a washing machine with hot and cold connectors. I bought a y connector as you advised and tried that and it filled with water on programmes it wouldn't do previously, but it didn't look like much water to me... Also, it didn't feel hot - do I need to wait for quite a while for it to heat up? And should it now be using less water like it appears to be? Thanks in advance! Ps I was quoted £100 for some one to look at this and remedy it for me - think he thought I was a daft single woman, easily parted with her cash! I'm really hoping to prove him wrong!!

Hi – we recently moved house and have the problem highlighted here ie only a cold water feed to a washing machine with hot and cold connectors. I bought a y connector as you advised and tried that and it filled with water on programmes it wouldn’t do previously, but it didn’t look like much water to me… Also, it didn’t feel hot – do I need to wait for quite a while for it to heat up? And should it now be using less water like it appears to be? Thanks in advance! Ps I was quoted £100 for some one to look at this and remedy it for me – think he thought I was a daft single woman, easily parted with her cash! I’m really hoping to prove him wrong!!

Andy Trigg

Likely replying to Sarah

Hello Sarah. The y-piece allows the washing machine to work on all programs by supplying cold water to both the hot and cold fill valves, but of course without a hot water supply all water going in will be stone cold. Your washing machine will now be a cold fill washing machine. The water will heat up inside the machine.

It may now take longer to wash than it used to, however it may only be a small amount longer depending on your previous plumbing and the wash cycles you use. The upside is that if it does take a bit longer to wash it may actually wash more thoroughly than before and give better wash results. The only way to get hot water to your washing machine is to have a plumber to plumb it into a hot supply. This should not be necessary now you have fitted the Y piece unless by any chance you use a lot of boil washes or you find it is taking considerably longer to wash which you find inconvenient. Most washing machines are now cold fill only anyway as explained in my article cold Fill Washing Machines

Sandra 0 replies I have a Whirlpool American top load washing machine we have connected both hot and cold feed but both to cold water, water is going into the machine but not heating up not sure if i have to defo have hot water going in

I have a Whirlpool American top load washing machine we have connected both hot and cold feed but both to cold water, water is going into the machine but not heating up not sure if i have to defo have hot water going in

Charlie 1 reply Hi, 1st time setting up a washer so not very good.. Can i use 2 blue pipes to go on the hot & cold tap?

Hi, 1st time setting up a washer so not very good.. Can i use 2 blue pipes to go on the hot & cold tap?

Andy Trigg

Likely replying to Charlie

Hello Charlie: In the old days the cold water hose needed to be able to cope with higher water pressure and the hot one cope with higher water temperatures but I wouldn’t be surprised if they were exactly the same hoses – just in different colours. However, I can’t say for sure. They used to be made of soft rubber where the pressure and temperature may make a difference but they are now made of different material. I can’t see any harm in using one temporarily but to be on the safe side it’s probably best to use a red one for hot on a permanent basis just in case.

Whitegoodshelp (Andy Trigg) 0 replies It's all explained in the article Ross. However, if you can still connect the hot water hose to the washer and you just mean there won't be any hot water (i.e the water will still run through but it won't have been heated up) then just connect and use it as normal and it will all work fine. It will just take a little bit longer. If the hot water system is out of commission and no water running to the hot pipe then just read the article which explains it all :)

It’s all explained in the article Ross. However, if you can still connect the hot water hose to the washer and you just mean there won’t be any hot water (i.e the water will still run through but it won’t have been heated up) then just connect and use it as normal and it will all work fine. It will just take a little bit longer. If the hot water system is out of commission and no water running to the hot pipe then just read the article which explains it all :)

Ross 0 replies Hello. I have moved into a new flat that has a washing machine with cold and hot inlet but the boiler is waiting to be repaired so have no hot water. Will the machine work or do I need to disconect the hot and use a y thing. Thanks

Hello. I have moved into a new flat that has a washing machine with cold and hot inlet but the boiler is waiting to be repaired so have no hot water. Will the machine work or do I need to disconect the hot and use a y thing. Thanks

Vic 1 reply Hi, I live in a caravan and am looking to buy a mini washing machine from good ideas, model 889, which has a single fill pipe which you connect to the hot water supply. I only have a cold water supply. Can I connect the inlet to the cold water supply and expect it to clean my washing if I use a biological washing poweer?

Hi, I live in a caravan and am looking to buy a mini washing machine from good ideas, model 889, which has a single fill pipe which you connect to the hot water supply. I only have a cold water supply. Can I connect the inlet to the cold water supply and expect it to clean my washing if I use a biological washing poweer?

Whitegoodshelp (Andy Trigg)

Likely replying to Vic

Hello Vic: The reason you need to connect the mini washing machine to the hot water supply is almost certainly because it doesn’t have a heater. Checking some of the reviews on line about it, most people seem to say it washes OK but they have all said you need to fill it with water already at the right temperature. The chances of it washing well in cold water aren’t good but you should at least use biological detergent and let it soak a while so you may be OK if stains aren’t strong. If you could get hold of detergent designed for cold water it might be better but not sure if they do it. Also, it’s a twin tub, which always needs special twin tub detergent. If they still sell twin tub detergent you need to try that first as normal detergent designed for automatic washing machines won’t work as well inside a twin tub.

Mia 3 replies Yes you can not imagine how much has been ruined. I've also tried google to see if the landlord has an obligation to have a cold water pipe installed as washing machines ARE cold fill - and also the fact that he tricked us putting a blue cap on the hot pipe.

Yes you can not imagine how much has been ruined. I’ve also tried google to see if the landlord has an obligation to have a cold water pipe installed as washing machines ARE cold fill – and also the fact that he tricked us putting a blue cap on the hot pipe.

Andy Trigg

Likely replying to Mia

Mia, I would have thought if it’s a fully furnished rental property then all necessary appliances should be there and working correctly. Even if not, the basics such as electricity and plumbing are clearly prerequisite, and I’ve never heard of someone trying to rent out a property which doesn’t have the ability to use a washing machine – no one would accept such a property.

If there is somewhere like a letting agent involved you should try to get them to sort it out. Alternatively you need to take advice from a consumer or government advice group, try searching google for –
who do you complain to about rented accommodation – and you will get good links to research.

I realise you are in a difficult position but the fact you are researching implies you are not willing to accept the situation. There is a lot of protection against landlords available these days.

Mia

Yes we have an agent and they wrote a letter informing us the landlord have no intention of fixing the pipe situation :(
This is just among a lot of issues! There are unclosable doors and other repairs he has refused to carry out. I have tried google but can’t find any direct help. He has decided to end our tenancy when the contract ends in June so he doesn’t need to fix anything. We have lost hundreds of pounds in agency and moving fees. I have 2 kids under 3 and we now have no where to go in June as the deposit won’t be released until July and he has even threatened to keep it! I have decided to bring him to court because of this and his harassment.

I feel like I have no rights!

Andy Trigg

Likely replying to Mia

Hi Mia: There’s a lot of help and direct advice on google searching for the exact phrase I recommended. The first result is ideal. Good luck.

Mia 1 reply Hi! Do you have any advice to what can be done if we have a cold fill washing machine but only a hot water pipe? The pipe is marked blue but it is in fact hot and 'hot' is 80 degrees. The machine or clothes can not be touched for 15 minutes after a wash as steam are coming from them! Landlord is an asshole and doesn't care.

Hi!
Do you have any advice to what can be done if we have a cold fill washing machine but only a hot water pipe? The pipe is marked blue but it is in fact hot and ‘hot’ is 80 degrees. The machine or clothes can not be touched for 15 minutes after a wash as steam are coming from them! Landlord is an asshole and doesn’t care.

Andy Trigg

Likely replying to Mia

Hello Mia. Yours is an unusual problem. You can’t connect a washing machine to the hot water tap for reasons described here – Can you connect a washing machine to the hot water supply? If the house is furnished, and comes with all appliances then clearly it isn’t coming with a washing machine because without a cold water supply it can’t be used. I’m surprised you haven’t ruined lots of clothes.

Ben 1 reply Hi There, I have a cold only feed washing machine. My problem is that the un-used hot feed is dripping slowly when fully shut off. I have read i could cap it off witha fitting but i have some other info that i shouldnt do thuis if i have a combi boiler, which i do. My question is can i just cap it off and forget about it orwill there be an eventual problamatic build up of pressure? Thanks

Hi There,

I have a cold only feed washing machine. My problem is that the un-used hot feed is dripping slowly when fully shut off. I have read i could cap it off witha fitting but i have some other info that i shouldnt do thuis if i have a combi boiler, which i do. My question is can i just cap it off and forget about it orwill there be an eventual problamatic build up of pressure?

Thanks

Andy Trigg

Likely replying to Ben

Hello Ben. I’ve not heard of this advice. My question would be, how can there be a build up of pressure if the leaking water (which is not at any pressure) fills up the blanking cap and can’t go anywhere else? It would presumably be exactly the same pressure created when the hot tap is turned off?

I suppose the perfect answer would be to fix the leaking tap. However, I don’t understand what difference there would be between the hot water not flowing because of a blanking cap, and because the tap is shut off.

If your tap is one of those with the red plastic lever, unscrew the plastic lever and try turning it properly off with some pliers.

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