B&Q Electric Shower Sale - Gainsborough from £40 (10.5kw - £60) - HotUKDeals
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We were looking for an inexpensive electric shower for our girls bathroom, checked instore on Saturday and the 10.5 kw at £89 was a pretty good price, we had been looking for a couple of days...went on line Sunday now down to £60...we used ring and reserve and collected today...even rung us on Sunday to say in stock.

They have Gainsborough showers starting at only £40.

Free delivery on orders over £50

Not on Quidco, but according to the cashback maximiser at MSE up to 3% from Cashback Kings, or 2% from TopCashBack.
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6y, 11m agoFound 6 years, 11 months ago
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#1
Just ordered one of the £40 Gainsborough's from my local B & Q and went through Quidco - they are offering £2 for a Reserve and Collect per basket, not per item, but only ordered the shower so £38 - result.
#2
Neat post mate.

Factual. Explicit. Concise. Perfect.

Thanks... I can make use of this :-D cheers
#3
How can we install it? it seems bit difficult ..:oops:
#4
humadoon
How can we install it? it seems bit difficult ..:oops:


Er... connect to cold water supply, connect to its own earth with grounding rod if necessary, if using a 10kw then you'll need some 16mm cable I think (check) and perhaps you'll need to upgrade the wiring to the external supply to 25mm if not already at that level or above (not sure about UK standards). Install a Safe-T-cut with the right amps (remember physics ?) 10,000/220=45 amps so you'll need a 50 amp Safe-T-cut. Perhaps check your board has a good overall safety.

Of course, get some help if you cannot do it yourself. easy enough for an amateur if it is just a replacement for an existing unit but not so easy if it is a new install.
#5
3.1415926;6560816
Er... connect to cold water supply, connect to its own earth with grounding rod if necessary, if using a 10kw then you'll need some 16mm cable I think (check) and perhaps you'll need to upgrade the wiring to the external supply to 25mm if not already at that level or above (not sure about UK standards). Install a Safe-T-cut with the right amps (remember physics ?) 10,000/220=45 amps so you'll need a 50 amp Safe-T-cut. Perhaps check your board has a good overall safety.

Of course, get some help if you cannot do it yourself. easy enough for an amateur if it is just a replacement for an existing unit but not so easy if it is a new install.


good advice but not all showers are the same.....eg power rating - for some people the shower wont work well at all
#6
i got this 9.5 KW version installed 2 weeks ago. It's not as powerful as my old shower (which was a 10.5KW version) obviously, but the difference is very noticeable.
Decent enough but not the hottest and flow rate is not great either.

Maybe better for en suite than main bathroom. Good for £40.
#7
royals
good advice but not all showers are the same.....eg power rating - for some people the shower wont work well at all


Not good acvice in my opinion. Get aen electrician in, there is so much to consider when installing a shower, cable ratings for example.
#8
I'm sure this is cheap but electric showers are useless. That's not open to debate, it's a hard fact.

You simply cannot heat water quickly enough on a domestic mains electricity supply to provide a good flow rate of water.

In the summer, when the incoming water is warmer, and you might not want such a hot shower they can be just about acceptable. In the winter, they are useless.

The only positive is the fact that you don't need a hot water supply so you can always have a shower.
#9
what drivel
#10
humadoon
How can we install it? it seems bit difficult ..:oops:


The fact that you have to ask means you shouldn't go near it with a ten-foot barge pole. Leave it to the experts, get an electrician to install it!
#11
dont forget that as the bathroom/shower room is a specal location Part-P applys!
IE you need a registerd spark to do the work or you need to inform the councel planning dept and have them inspect the work!
#12
Rich44
what drivel


It's not drivel. It's cold hard physics.

Even if an 11kW electric shower were 100% efficient it cannot heat a sufficient volume of water to provide a good shower. It can heat a little bit of water well, and a lot of water poorly.

The choice with an electric shower is ALWAYS heat or flow.
#13
So we're on economy 7, have a hotwater tank, cold water is direct from mains, there is no pre-existing shower installed.

What type of shower will be best for us?

And typically how much would an electrician charge for installation?

Cheers
#14
Nice 1, nice debate as well, couple of interesting points,
#15
londislagerhound
I'm sure this is cheap but electric showers are useless. That's not open to debate, it's a hard fact.

You simply cannot heat water quickly enough on a domestic mains electricity supply to provide a good flow rate of water.

In the summer, when the incoming water is warmer, and you might not want such a hot shower they can be just about acceptable. In the winter, they are useless.

The only positive is the fact that you don't need a hot water supply so you can always have a shower.


What is the alternative? I too would like a shower that blasts you. We have a combi boiler so could use that but with six people in the house theres a good chance someone will turn another tap on leaving you to freeze (or boil) in a drizzle of water.
#16
londislagerhound

Even if an 11kW electric shower were 100% efficient it cannot heat a sufficient volume of water to provide a good shower. It can heat a little bit of water well, and a lot of water poorly.


Utter crap ! :roll:

My electric Mira Sport Shower is superb ...regardless of summer or winter !! :thumbsup:

Technology is changing all the time......you'd be surprised what new ones can do now.

I've always thought Gainborough to be a bit poor though but may be adequate fro some folk.
#17
lynnexxxo;6562132
What is the alternative? I too would like a shower that blasts you.
Think about it first - you can waste an awful lot of water and fuel that way. Even if you don't give a stuff about the environment, it will hit you in the pocket. With that sort of shower it's easy to use more water than you would use for a bath.
We have a combi boiler so could use that but with six people in the house theres a good chance someone will turn another tap on leaving you to freeze (or boil) in a drizzle of water.
In that case your mains supply has inadequate flow, and so your solutions are either to spend an awful lot getting it upgraded, or to spend an awful lot going back to a gravity-fed system with a cistern in the loft and a hot water cylinder (and possibly a pump for the shower), throwing away your combi boiler in the process. It looks like you have been mis-sold a combi boiler for a property which is too large, unfortunately.
#18
Mecoconuts;6562343
Utter crap ! :roll:
Well not really. You can't break the laws of physics.
My electric Mira Sport Shower is superb ...regardless of summer or winter !! :thumbsup:
Here is the problem - you are happy with your shower, which is fine. What you are not appreciating is that it gives out the same amount of hot water as any shower of the same power.
Technology is changing all the time......you'd be surprised what new ones can do now.
Exactly the same as the old ones of the same power. You can add as many bells and whistles as you like, but you won't get more heat out than the energy you put in. If you find a shower that does that, you've come across a free source of energy or a perpetual motion machine, and you can make your fortune.

I've always thought Gainborough to be a bit poor though but may be adequate fro some folk.
They may fall to bits in two minutes. What they will not do is produce less hot water than any other make of shower with the same power.
#19
Mecoconuts
Utter crap ! :roll:

My electric Mira Sport Shower is superb ...regardless of summer or winter !! :thumbsup:

Technology is changing all the time......you'd be surprised what new ones can do now.

I've always thought Gainborough to be a bit poor though but may be adequate fro some folk.

Let's look at a 100% efficient 11.5Kw electric shower:

11.5kW = 410000000 joules per hour, or about 700,000 joules per minute.

You need 4 joules of energy to heat 1 gram of water by 1 degree C. To heat water for a shower you need to raise it from about 5 degrees to 40 degrees, a 35 degree rise.

That 35 degree rise therefore needs 140 joules per gram, meaning our 700,000 joules can heat 5000 grams of water from mains temperature to shower temperature.

5000 grams of water = 5 litres.

So, the maximum possible amount of water an 11.5Kw shower can heat and supply is 5 litres in a minute, and that's at 100% efficiency.

That's a dribble compared to a decent power shower which will deliver 15-18 litres of hot water from your tank.

Disagree all you like boys, but them's the facts.
#20
londislagerhound
11.5kW = 410000000 joules per hour, or about 700,000 joules per minute.


Altogether now ..

(to the tune of la cucaracha)

When you're using the force of a Newton
And the distance you move is a metre
Then your work is just one newton-metre
And the energy lost is one Joule!



.. Sorry , thats in no way relevant :oops:

It was beaten into me by a science teacher 30 years ago and has been stuck in my head ever since :roll:
#21
I'm getting blinded with techy here.

I've just moved and now have an electric shower which is rubbish. How can I make it better?
New one off the combi boiler?
Power shower (electric)?
Or something to do with increasing the electricity supply?

Any help will be gratefull received. :thumbsup:
#22
mrsj2008;6564389
New one off the combi boiler?
Yes, that will be better - a combi boiler can always produce hot water at a faster rate than an electric shower.
Power shower (electric)?
A power shower as opposed to an electric shower is simply a normal shower with a pump which forces the water out more quickly, if there is more water available to force out more quickly, which will only be the case for a conventional system with a hot water cylinder, not a combi boiler.
Or something to do with increasing the electricity supply?
The only thing that matters about an electric shower is its power in kilowatts (kW). You should be able to find this written on the unit somewhere. If you can increase this by, say, replacing a 7kW shower with a 10kW one, you will get faster hot water flow, but you may need to replace the wiring between the shower and the consumer unit (fuse box) to uprate it, plus possibly an "MCB" in the consumer unit, and there may also be other complications due to tougher current safety regulations if the installation isn't particularly new. You'll need an electrician to advise.
#23
dont but this.we had a gainsborugh electric shower from b n q.it lasted six months,sent away for a replacement under the warranty,this lasted 4 months.absolute rubish.hardly any water pressure too.bought a mira shower ...much much better !!!!!
#24
Hi, your calculation proves the point that to get the temperature high enough you have to compromise on flow rate, so you will not be able to heat 5 litres per minute to 40C, but you could do it with a lower flow rate. Life is full of compromises.
#25
thanks pibpob for the advice :)
#26
well i enjoyed my post, as it goes we have a pump from out hot water tank for the shower in our ensuite - which is fab, this is just for the occassional shower and our growing girls (8 & 4) for occassional use, I have used a 8.5kw in the past and yes not exactly powerful but almost good enough...this should be just fine, I don't want to blast the girls out the door, or for that matter soak the bathroom. ;)
#27
londislagerhound
Let's look at a 100% efficient 11.5Kw electric shower


Let's not !!

I think you'd be better looking at getting a life .....ROFL .....:-D
#28
bigfella
dont but this.we had a gainsborugh electric shower from b n q.it lasted six months,sent away for a replacement under the warranty,this lasted 4 months.absolute rubish.hardly any water pressure too.bought a mira shower ...much much better !!!!!


We have had a 9.5kw Gainsborough shower for 9 years and it's used 1-2 time a day every day!

In all that time it has'nt missed a beat.

Also it heats the water to more of a temp than i can stand whilst still giving an excellent flow,this will obviously depend on your water pressure.
#29
saintscouple
So we're on economy 7, have a hotwater tank, cold water is direct from mains, there is no pre-existing shower installed.

What type of shower will be best for us?

And typically how much would an electrician charge for installation?

Cheers


Presuming you have a bath, then you could have or perhaps already have a shower run from the taps with a mixer.

If your tank is small or too small for your family, then you face a number of different choices. I have gone through this a few times.

10 years ago, I replaced a circa 180L immersion heater with a massive Heatrae Sadia unit which was overkill for the property but you'll never go short ! The property was new, with showers run from the bath on mixer and dedicated showers in en-suite. Today, I would no longer go down that route.

Today, I would rip out the immersion heater and install a multipoint Panasonic water heater. They don't come up on google here but this is what I use in Asia http://www.panasonic.co.th/web/pid/2390/Feat

Apart from the safety aspects, you need to consider the pure simple physics. You need to look at pipe sizes and water pressure. If you are extracting water from multiple outlets, then you need to make sure that your inward flow (pipe size and pressure) is great enough to balance the outward flow. If it is not, then the safety cut out will stop power to the heating element and you will have cold water. Typically you see people reducing flow to restart the heating element.

I see Heatrae Sadia has something at £1000 or more but this top of the range in Asia is only about £150.

In Asia we tend to use water pumps to regulate pressure but many places in the UK have good pressure and don't need a pump.

So what would I do ? If you have lots of spare hot water, then just run one off the bath with mixer taps. Cheapest by far.

Next is to install an on demand unit. It doesn't have to go on the wall at the point of showering as in the past.

Unless you have lots of other outlets and perhaps if you have a cupboard under a sink, I'd put in a multipoint which powers the shower and anything else you want. Put it in the cupboard under the sink or build one.

Cost ? The plumbing is simple, the electric also but good workmen are hard to find. If labour costs are £300 a day, then 1/2 to 1 day for a dedicated shower unit put in with chasing into tiles and making good. If just off the taps then 1 or 2 hours. Full installation following removal of current boiler, perhaps 2 days.
#30
MuswellHillBilly
Hi, your calculation proves the point that to get the temperature high enough you have to compromise on flow rate, so you will not be able to heat 5 litres per minute to 40C, but you could do it with a lower flow rate. Life is full of compromises.


Then sort out your pressure and pipe size issues. Easily done.

Flow issues are almost always compromised by the wrong pipe sizes being used for the situation. If people don't understand that then you have no hope.
#31
10kW - someone I know takes an hour in the shower, that would cost a quid a day!

Still, it's a good deal for everyone else!
#32
Not directly related to the OP posted bargain but my electric shower broke last year so I looked around for replacements. Locally, I could only find totally different models starting around £100. A big nuisance was that the water entry and the electrical entry location vary from shower to shower. This would have meant moving pipes and/or redoing the tiling. With the power of the internet, I found this shop with the exact same model that was broken: http://www.toolstation.com/shop/Taps+Showers/Electric+Showers/d240/sd3196. Put the order, 48 hours later it arrived at the door, took me 15 minutes to put in place. If you are looking to replace an existing shower, do try to get one with the same inputs, it makes installation much more simple.
#33
Mecoconuts
Let's not !!

I think you'd be better looking at getting a life .....ROFL .....:-D


I love it when people get proved wrong and get forced into the 'get a life' defence.

******.
#34
londislagerhound;6571628
I love it when people get proved wrong and get forced into the 'get a life' defence.

******.
Absolutely. Isn't Mecoconuts making a grand fool of him(?)self?
#35
londislagerhound
I love it when people get proved wrong and get forced into the 'get a life' defence.

******.


Sorry proved wrong ?....where ?.... do u mean ur ridiculous post above ?....i think not ....idiot !!! :roll:
#36
Mecoconuts;6577854
Sorry proved wrong ?....where
Er, here:
Mecoconuts;6562343
Utter crap ! :roll:

My electric Mira Sport Shower is superb ...regardless of summer or winter !! :thumbsup:

Technology is changing all the time......you'd be surprised what new ones can do now.
The point is that "new ones" can do no better than "old ones" of the same power, however much "technology" is involved. And there's no "changing technology" in a heating element. You're bound by the law of conservation of energy. I would indeed be surprised if your shower magically produces more hot water than the power you put into it will generate, and so would the entire scientific community.
#37
I wouldnt have this as its too slow, we have a power shower and it cannot operate from a combi, it even states on the box....we had to have a seperate immersion tank put in and a massive header tank. Its ok if that is all you are going to run but in a multi bathroom house you need constant flow and pressure. I agree with pibpob as I have seen people scalded (or frozen) with a shower attached to a multipoint, and seen the dribble that comes out of these showers when attached to the mains supply.
The person that said pumps were good for boosting supply needs to look again, it is illegal to pump from the mains in my area.
#38
3.1415926;6570417
Today, I would rip out the immersion heater and install a multipoint Panasonic water heater. They don't come up on google here but this is what I use in Asia
That just looks like the equivalent of a combination boiler (combi) without the heating part - applicable there but not here as everyone here has central heating. Same applies: better output than electric heater but often limited by the capacity of the mains supply (which has to provide cold water for toilet flushing, etc, simultaneously).
#39
londislagerhound;6561802
It's not drivel. It's cold hard physics.

Even if an 11kW electric shower were 100% efficient it cannot heat a sufficient volume of water to provide a good shower. It can heat a little bit of water well, and a lot of water poorly.

The choice with an electric shower is ALWAYS heat or flow.

Definately DRIVEL.
#40
Jefft;6585719
Definately DRIVEL.
Go on then - back up your statement with some evidence. Show me two electric showers of the same power that have different performances.

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