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Reviewbucket.co.uk scanned the internet for GROHE Grohtherm 800 (34558000) reviews.
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For GROHE Grohtherm 800 (34558000), 94 customer reviews collected from 2 e-commerce sites, and the average score is 4.4.

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Amazon has 92 customer reviews and the average score is 4.4. Go to this seller.
Ebay has 2 customer reviews and the average score is 5. Go to this seller.

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17.4.2018

First of all, the quality of the thermostatic unit itself is very high, as I have always found Grohe products to be. The finish is excellent, and the weight of the unit gives it a very solid and robust feel. The action of the two rotating switches at the end is smooth and has a good quality feel. The shower head itself has three spray options, and we had a little trouble eliminating a small leak between the shower head and the hose. However we tightened it, a small trickle of water came out of the screwed joint when the shower was on – we will replace the washer and try to resolve this, but at the moment it is a little disappointing.Before buying this unit, please do take care that your water system is compatible with it.We had this fitted, turned all the water back on, then started the shower – any absolutely nothing happened – no water came through at all. After some investigation, the problem was that the thermostatic valve would not let water through initially, and for our system, it is the water flow that turns the pump on. So, we now have to turn the bath tap on first (which gets the pump going) and then the shower (after which the bath tap can be turned off). Our water tank and pump are on the same floor as the shower, so we lack the gravity in the system which would work for a loft mounted tank. I’m no expert, but our plumber mentioned that a negative head pump would resolve our issue, but for the moment we are living with the slightly awkward workaround of having to use the bath tap as an “on switch” before using the shower. In retrospect, I wish we had bought a simple mixer shower valve, and foregone the safety benefits of a thermostatic valve, but you live and learn…
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20.3.2018

I bought this to replace a similar item fitted in our house ten years ago. The original item was a cheaper make than this, but has lasted ten years in a second bathroom so I’m optimistic this will exceed that use.Bought this one as the dimensions closely matched those of the fitted unit we had already, so we expected a simple swap by our plumber with no more holes in the wall and no tiles to be replaced.We weren’t disappointed. The plumber switched off the water and swapped this unit in very quickly. He couldn’t swap the shower head sliding bracket without needing to drill new holes so he left the old one in and the shower head fits in it fine.The hose from the shower to the shower head is a flexible pipe rather than the usual metal type that overlaps when it bends.I prefer this as the metal types are more prone to mould as water can sit in the small grooves. (Hopefully you know what I mean).My only criticism is that the actual shower head itself seems really cheaply made compared to the actual shower control unit. But we never bought it for the shower head, it was just cheaper to get the all in one thing.It’s a standard size so we could replace the shower head if we wanted with ease.
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7.1.2017

I bought this during an Amazon daily deal to replace similar by the same manufacturer that had started to leak in my bath after 9 years use.The deal Amazon offered would have paid for the accessories offered with this item. I only needed the mixer part.My only criticism, hence 4 not 5 stars, is that the water pressure was reduced when compared with the one I had fitted. This is why I only used this temporarily until my original was repaired.Like my original, by same manufacturer, this is excellent. Brilliant chrome finish, high quality product and minimalist controls that can be used blindfolded (soap in eyes!).

2.8.2019

I maintain five houses. This purchase replaced a Screwfix exposed shower valve (~£50) that failed after 2 years. This one works a lot better than the Screwfix one ever did, To date I haven't had a Grohe valve fail at all. The one in my home bathroom was fitted in 1994 and is still working as well as when it was installed. You can do the math. It attached OK on the screwfix mountings but I had to use some O rings to get it to seal. Buying quality is cheaper in the long-run.

3.11.2018

Never buy a cheap shower when quality of this standard is so affordable. All of our showers are Grohe. Quarter turn on/off is fluid in motion and easy to rotate with wet hands. Thermostatic temperature control is almost instantaneous which is great if you have other water users at home causing pressure drops at the shower head.Head position lock is positive and has never slipped.Fully serviceable and parts are readily available (not that we have needed any to date).

2.10.2017

Ordered this to replace the shower I currently had. Very easy to fit and install, I was up and running in 20 minutes. The shower is really powerful and gives a great stream of water from the shower head. I love the easy clean finish, just wipe clean with a dry cloth and it brings back the high shine finish. The shower head has an easy clean system too, that can be cleaned with your finger tips. Al in all very happy.

5.12.2019

Quality shower set from Grohe.Thermostat in the cheap one installed by the builders broke in less than a year, so we've replaced it by that.3 years later, this one is going strong - only needed to replace hose after 2 years, which is to be expected.It is high quality item, inside and outside, easy to clean and still looks and works like new.As the old saying goes - buy cheap buy twice - so get this instead!

5.6.2016

Thermostatic valve is brass and looks great quality - haven't fitted yet. Shower head and hose are ok but cheaper quality. Where this product is let down is the cheap riser rail bracket which is not adjustable and has a false button just for show. Had to buy a new shower holder but still would recommend buying the whole package as its a much better deal than just buying the thermostat and everything separately.

15.1.2018

Not much t fault. I could not use the chrome nut covers because the original threaded pipe ends did not extend far enough through and from the wall (I did not want to dig out and replace the existing offset threaded connections). I used the original chrome covers.I am generally impressed with the shower a month later. The water temp is well managed and it seems to allow higher pressure from the same supply.

23.11.2016

Purchased a shower unit from Better Bathrooms, including shower unit. Rubbish! Did some research on showers and purchased this shower from Grohe. Wow, its great !! Excellent control of the water and adjustment to my requirements. I have a Mira shower in the other bathroom and find this,as good, if not better! I would recommend this shower unit, for its price and quality.

19.2.2017

As with all Grohe products, looks good and works well, especially for the money. Why spend a little less and get something that looks cheaper!Note that you do need to rotate the output control quite a way around to get to full, (past the eco-stop button). Shower handset rail also looks good and works well as does the shower head.

30.1.2016

This is a great Grohe product and I would have given it 5 stars but the item Easyreach tray DOES NOT come with this item which was very disappointing as I would not have ordered it if I had known. But as I was out of time and up against a deadline I had to keep it. I did get a £28 discount after complaining

17.3.2018

Happy with this set, works as expected and feels good quality. The only thing I slightly dislike is that there is no sticking switch to turn the head's different settings, so it's a bit tricky to turn the whole plate with wet hands. The temperature and pressure switches are very easy to turn and adjust.

18.12.2018

Had this fitted in place now for six months at home and it is one of the best shower valves we have used. Quality chrome finish and smooth operating valves. Looks the business and gives masses of water pressure from our pressurised hot water tank. Not sure if it is compatible with gravity fed pressure?

26.9.2017

Nice shower with good temperature control even when someone turns the washing machine on while im using it! annoyingly the fittings supplied did not fit my pipes but a quick visit to B&Q sorted that problem out. other than that it was fairly easy to instal for a DIY novice.

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