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Hi I’m looking into get a dish washer (freestanding) I have fittings under my sink for it but there is only a hot feed tap .
Every dishwasher I look at seems to be cold fill only
Is there a way round this without any plumbing work
Or can I use the connection I have ?? ThanksRe: Hot fill
ALL Bosch, Siemens and Neff dishwashers can be used on a hot supply.
There will be a stark conflict of opinions over this question. From my side the answer is yes you can use the hot fill supply to most if not all dishwashers. I have used hot fill on all my dishwashers over the last 40+ yrs (at least 4 over that time). The only caution is that the water temperature must NOT exceed 60 celsius. And with most hot water systems that temperature would never be reached with the little amount of water needed to operate. But as a crude rule of thumb, if you sink tap produces ‘scolding hot’ water then your hot water system thermostat needs turning down anyway.
It is a nonesense for anyone to suggest that the modern dishwashers must only be used on a cold supply. Though if a fault occurred to the appliance whilst under warranty the guarantee could be in jeopardy for not fully complying with the manufacturers instructions.
Re: Hot fill
Is it really a hot tap or does it just have a red plastic tap fitted to a cold feed. Unusual for under sink plumbing to have only a hot tap TBH.
Re: Hot fill
Thank you for your answers and yes it is a red plastic connecter underneath sink do have picture but is to big to attach
Re: Hot fill
Can you trace the pipework under the sink to see if it is actually hot or cold feed?
Or put a hose on it and run it into a bucket for a short while.
Re: Hot fill
Martin wrote:It is a nonesense for anyone to suggest that the modern dishwashers must only be used on a cold supply. Though if a fault occurred to the appliance whilst under warranty the guarantee could be in jeopardy for not fully complying with the manufacturers instructions.
The dishwasher can yes, technically in most cases.
The same cannot be said for all the detergents. You also need to check that you are using an appropriate one that is suitable for use in those conditions as many are designed (like washing machine) to have a temp curve, not instantly exposed to hot or you degrade the cleaning effectiveness.
And yes, if on hot it may well invalidate some warranties.
K.
Re: Hot fill
kwatt wrote:The same cannot be said for all the detergents. You also need to check that you are using an appropriate one that is suitable for use in those conditions as many are designed (like washing machine) to have a temp curve, not instantly exposed to hot or you degrade the cleaning effectiveness.
It is a fact that modern detergents are best ‘formulated’ for cold water input. The extended period it takes for the cycle to reach its optimum temperature allows the detergent to reach maximum effect.
In my experience the shorter wash times using cold water formulated detergent on a hot water fill does not have any detrimental effect on cleaning.
Incidental to all this I have found that if a machine has a ‘heat exchanger’ then they don’t dry as well using a hot fill supply. And if your machine has a heat exchanger system then cold water is best. Swings and roundabouts.
Re: Hot fill
Not quitte Martin.
There’s enzymes in there that break down grease, fat and so on that operate at under 40?C.
And you’ll find a number of “hard pressed” tablets and some not so much won’t dissolve correctly if you use hot water, negating the all-in-one effect.
Hence the stock advice that it’s not really a good idea.
I didn’t know about the heat exchanger thing though, never heard of that before, an interesting one nonetheless.
K.
Re: Hot fill
Thanks for tips looks like I may have to rethink
Would it be expensive to get someone to fit a cold tap under the sink ?Re: Hot fill
janey700 wrote:Would it be expensive to get someone to fit a cold tap under the sink ?
Certainly not, 30 minute job, short length of copper pipe and a stoptap, sorted!
Re: Hot fill
Oh god I’m so blonde just looked under the sink again and moved a saucepan out the way and … found the cold tap as well just further down on other side lol so looks like I can get my dish washer now 😀
Thanks for all your help and advice xxxRe: Hot fill
janey700 wrote:Oh god I’m so blonde just looked under the sink again and moved a saucepan out the way and … found the cold tap as well just further down on other side lol so looks like I can get my dish washer now 😀
Even better then, so now you have the choice. :tup:
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