Wet Room Shower Tray 800 x 1200 x 20 mm Quadra Offset FastFlow Dallmer

28 Reviews
£288.37 Save 40%
Tax included

The 800 mm x 1200 mm shower base is 20 mm thick and is designed to be tiled over, providing level access into the shower without a step up. The shower base is produced from XPS foam and re-enforced on both sides with a fibreglass mesh and coated with a flexible cement. This surface is ready to tile onto. It's lightweight and flexible enough to absorb movement within the structural floor.

The shower base has a machined slope cut into it, providing a 4 way fall from each corner to the drain. The drain is offset from the centre of the tray, creating a shower zone to one end of the tray. While leaving the other end is more of a walkway or entrance to the shower. This allows for the entrance to still have a gradual slope for water to flow back toward the drain.

The XPS foam has great acoustic properties and therefore is an excellent choice for showers here in the UK, when you can generally hear everything that's going on upstairs! It can be easily trimmed if necessary, say around pipes or other obstacles, or if you are fitting a shower that is not quite the size of the tray. The height of the drain is 10mm, however this can be extended to 17mm using the extension provided.

Tray size
Drain Cover
  • Standard
Drain Cover
Waste Trap
Waterproofing kit
Underfloor heat mat
Shower screen
Product Code TSQO812
Check availability & delivery time

The 150 mm x 150 mm Dallmer gulley is integrated in an offset position. This means that it is 450mm from the short end and centred from each side.

Each tray comes complete with a standard stainless steel cover.

The K frame and stainless steel plate are factory fitted to the shower base to provide a perfect surface for the trap sealing ring to adhere to, making installation really easy. If you are using thicker tiles, an extension for the K frame is included.

The outlet pipe comes with a 2” BS ABS solvent weld adaptor allowing for a quick and secure connection to UK pipes. You can also upgrade to a 5 mm solid stainless steel cover, available in two different designs.


Data sheet

1200mm x 800mm
Drain position
XPS Foam Sheet
Fibre glass mesh & cementous glue.
4-way 2% towards the drain
Tanking kit
Drain surface
From above (Easy clean system)

Specific References

Parts Included
We highly recommend to include a waterproofing kit for every tray installation. 
When buying our Shower Base and choosing to include a waterproofing kit you will also receive a special bucket with all the sealing materials that you will need. With this kit you will be able to insulate and waterproof all your shower area and prepare it for tiling.

  • 4 kg of PCI Lastogum liquid foil
  • 1l of primer
  • 2 sealing internal corners
  • 2 sealing cuffs 10 x 10 cm
  • 10 m of sealing tape
Dallmer Waste Trap
Dallmer type 48 KE shower trap is included with our Shower Base. It featuers ball joint connector adjustable by 15 degrees. For more information and technical drawing please see Attachments tab above.

  • Top size: 150 x 150 mm
  • Frame size: 143 x 143 mm
  • Height: 86.5 mm
  • Width: 108 mm
  • Outlet : 50 mm
  • Base material: ABS
  • Base material: 304 stainless steel
  • Standard: DIN EN 1519
Dallmer Waste Technical Diagram
You can choose which grating you want with your Shower Base tray. We offer three different patterns to suit your needs.

This grating is stamp formed from thin stainless steel and features default well known stripes design.

This grating is laser cut from thick piece of premium stainless steel and features circles design.

This grating is also laser cut from thick piece of premium stainless steel and features stripes design

Dallmer Waste Trap

Parts Included
Parts included with every Wetroomstop Dot Shower Base:
  • Sturdy XPS board
  • Integrated square drain
  • Drain cover
  • Dallmer shower trap
  • (optional, highly recommended) Wetroomstop Waterproofing Kit
    Can I Fit A Wet Room Tray Myself?

    How Much Do Wet Rooms Cost?

    Are Wet Rooms More Expensive Than Traditional Bathrooms?

    Will A Wet Room Add Value To My Home?

    How Easy Is It To Clean A Wet Room?

    Do Wet Rooms Require Much Maintenance?

    Can I Install Underfloor Heating in a Wet Room?

    Are There Any Common Problems With Wet Rooms?

    How Do You Dry Out A Wet Room?

    How Do You Stop A Wet Room From Flooding?

    Why Is My Wetroom Not Draining?

    What Fall Should A Wetroom Floor Have?

    How To Unblock A Wet Room Drain?

    How Long Does It Take To Install A Wet Room?

    Do Wet Rooms Get Mouldy?

    How To Clean Grout Out Of A Wetroom Floor?

    What Type Of Drain Is Best For A Wet Room?

    Why have a curbless shower?

    What Are Wet Room Floors Made Of?

    Can You Use Lino In A Wetroom?

    What Kinds Of Tiles Are Best For Wet Rooms?

    Can I Cover A Wet Room Floor?

    What Flooring Is Best For A Wet Room?

    How Do You Slope A Wetroom Floor?

    How Much To Install A Wet Room Floor?

    What Is The Best Way Of Cleaning A Wet Room Floor?

    How To Use Jointing Tape?

    What's The Difference Between Tanking Tape & Normal Tape?

    How To Correctly lay down Tanking Tape?

    Does Waterproof Tape Actually Work?

    How Do You Seal A Wetroom Floor?

    How Do You Waterproof A Wet Room?

    Are Wet Rooms Disability-Friendly?

    Are Wet Rooms Suitable For The Elderly?

    Can I Get A Wet Room With A Seat?

    Can I Use A Wheelchair In A Wetroom?

    Are Wet Rooms Dangerous?

    Can I Get A Grant To Fit A Wet Room?

    What Is A Wetroom Tray?

    How Do You Raise A Shower Tray?

    What Sizes Do Shower Trays Come In?

    How Much Does A Shower Tray Cost?

    Do you sell the waterproof liquid separately. If so how much would 5 litres cost?

    No we do not currently sell the waterproofing liquid separately. You can purchase an additional tanking kit if you wish. It comes with 4 kg of lastogum, 1L of primer, 10m of sealing tape, 2 internal corners, and 2 pipe collars

    I have a 1300x700 area which I want to fit a wet room shower tray. Am I able to buy a 1400x900 off yourselves and cut to fit?

    Hello Luke,

    Thank you for your message.

    I can confirm that our trays are trimmable and there are several options for your 1300 x 700 shower area. 

    We can manufacture a bespoke tray to match that size exactly. It would take about 10 days and would have higher price but it wouldn't need any extra materials or effort,

    • 900 x 1400 tray with central drain, so you can cut it down to size symmetrically,
    • 800 x 1200 tray, cutting down to size the 800 mm dimension and extending 1200 to 1300 using tile backer boards, which are made of similar material to what the tray is made of.
    • If you can afford waiting, in my opinion it would be the best idea to go for a custom size wet room tray. 

    In case of any other questions I will be happy to assist. 

    Kind regards

    Chris 020 8145 4804

    Hi I am looking to fit a wet room and the dimensions I have are 1000 wide by 800 deep. I am struggling to find a tray that size with a centre drain. Can I cut down a 1200 by 800 reducing the 1200 to a thousand and simply allow for a packer (full she ...

    You can trim down a tray to fit those dimensions, however an Quadra Offset tray has the  drain 450mm from the short end of the tray. Which means that your drain will still not be directly in the centre of the tray. The best solution would be a bespoke tray in this case. If thats something you would be interested in please contact our customer service representatives and they will gladly assist in ordering a bespoke tray.

    Were do u install both pipe collars that are provided in tanking kit?

    The pipe collars provided with our tanking kits are to be used if you have water pipes sticking out of the wall for your shower valve. They are optional and only need to be used if required.

    What is the flow capacity for the shower drain

    The flow rate of the Dallmer type 48 KE shower trap is 40.82L/min

28 Reviews

Excellent product. Arrived on time but due to damage caused in transportation another had to be shipped. Not been fitted yet but I'm confident it will do the job.
By H. Holmes on 04/24/2020

very impressed
By dylan on 04/13/2020

By Michael on 04/09/2020

Good quality, unfortunately I chose wrong size for my shower. Returned and received another one promptly.
By Spencer C. on 04/09/2020

Great item, very easy to install!
By Mohammad Bolton on 04/05/2020

Installed and using for around 6 months now. A nicely finished shower base. The purchasing and delivering process went without a hitch.
By Adam on 03/25/2020

Good product
Bought one, already installed easily, works fine so far
By David Miller on 03/21/2020

Really good value and much better than most offered in shops. Product arrived in good condition and was a pleasure to use. I would definitely use wetroomstop again. Next day delivery :-)
By Dylan Young on 03/16/2020

Placed order online, received phone call within the hour and product delivered the next day.
By Cameron Willis on 03/10/2020

Bought this a while ago, only just installed, worth the wait. Looks great ;)
By Harry on 03/10/2020

The best
This item was purchased several weeks ago but fitted today. Everything is fine, superb value for money. Thank you so much!
By Metcalfe on 03/03/2020

Thank you :-)
Product as described, fast and efficient delivery. Will recommend to family and friends :-)
By Ellis Baxter on 02/27/2020

spot on, thanks
By jamie on 02/24/2020

Amazing shoower base! And plenty of shapes to chose from :D
By Jake Peters on 02/24/2020

Not the best quality, but works ok
By E. S. on 02/23/2020

By Charles on 02/16/2020

Have purchased from company a couple of times and each time items have been great and easy to install.
By B. D. on 02/13/2020

Good value.
Everything was perfect ;)
By Bailey on 01/26/2020

Very helpful on the phone and and polite. Very good service. Product arrived on time. Bought as a replacement for the old one and very easy to install :P
By Sam Scott on 01/10/2020

exactly as described
excellent product quality and service levels
By d. morgan on 12/23/2019

next day delivery
next day delivery
By ewan daly on 12/08/2019

Delivery next day. The plumber did say it was harder than normal to fit but I think it looks fantastic.
By Yasmin L. on 12/08/2019

5 stars
Easy to fit, would highly recommend. Looks far more expensive than it was.
By D. Wong on 11/20/2019

Fantastic quality
Quick, competitively priced website.
By Brandon Cox on 11/09/2019

Five Stars
I installed this shower screen in my new shower which was quite easy to do, looks great. Arrived on time well packed (complete with tray & drain)
By Oliver Parkin on 11/08/2019

Fantastic value for money and looks awesome
By Li Hsu on 11/04/2019

Very nice
Products delivered on time no fuss or excuses. Overall appearance is just stunning!
By Taylor on 10/17/2019

easy to use, works well
easy to use, works well
By george on 10/16/2019

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