Thermostatic mixing valve cost UK: prices and extras

A thermostatic mixing valve can sit in an amazon.co.uk basket for the price of a takeaway, or you can be looking at a concealed shower valve for £179.99. The thermostatic mixing valve cost UK shoppers meet first is that shelf figure. In the saved listings for our thermostatic mixing valve comparison, the nine listings run from £12.69 to £179.99. Those are saved supply prices, not a live scrape from this afternoon.

None of the nine prices sits next to a stated TMV2 or TMV3 mark. A qualifying purchase through a link on the comparison can earn us a commission, at no extra cost to you. Products Compared has not fitted these valves in a lab. The sums come from the listing files and published UK sources, written up in October 2026.

In short

On these amazon.co.uk listings the thermostatic mixing valve cost is a shelf price between £12.69 and £179.99. That sum is the body in the box. It leaves out fitting, isolation valves, strainers, and any TMV2 or TMV3 certificate, because none of the nine listings states those schemes. Older UK install figures stay in the year they were written.

Shelf prices in this comparison

The nine prices are display figures from the comparison's saved listings, VAT as amazon.co.uk showed it. They are supply prices from the day the file was kept, not a fitted price. The Tremax rows, gold at £22.99 and grey at £23.99, share a review pool of 4.3 from 428 reviews.

• Wincal: inline blender, 190 g, £12.69
• Rankomu: inline three-port, 320 g, £15.99
• Bohaner 04-502: inline three-port, 300 g, £16.89
• kisimixer KM806: inline three-port, 380 g, £16.99
• Coleniny CN607: inline three-port, 380 g, £18.99
• Tremax, gold body: inline blender, 460 g, £22.99
• Tremax, grey body: inline blender, 450 g, £23.99
• Zamery: exposed shower bar, 1.2 kg, £35.91
• GETSHOWERSET 2WAY-LEDSV-1: concealed shower valve, 2.49 kg, £179.99

Seven rows are inline bodies from £12.69 to £23.99. Zamery at £35.91 is the top pick when you want the exposed bar: 1.2 kg, two handles, a stated 38°C lock. GETSHOWERSET at £179.99 is the concealed brushed-gold valve: 2.49 kg, water-powered LED knobs, no stated 38°C stop, and no review line. Coleniny at £18.99 shows 4.6 from 87 reviews. Stars do not test a failed cold feed.

A TMV2 row is missing, because no listing prints that mark. Sort form and thread on the buying guide before you treat a row as the valve you will fit.

A scheme valve is a different line

TMV2 and TMV3 are scheme names. NSF's UK page ties TMV2 to BS EN 1111:2017 and/or BS EN 1287:2017, and TMV3 to D08. Kiwa's short line is that TMV2 is domestic or general, and TMV3 is healthcare. None of the nine listings states those schemes. A brass body with a 38°C button can still sit outside that sentence at £12.69 or at £179.99.

The files name other documents. Coleniny names ASSE and CSA. The gold Tremax names BS EN 1074-1 and BS EN 1074-2, a water-supply valve family. The grey Tremax names BS and CE with no TMV number. Rankomu names ASSE, NSF and UPC, plus a UK-standards bullet with no number. kisimixer names CE. Wincal names ASME B16.34 and MSS SP 80. Bohaner, Zamery and GETSHOWERSET name no TMV standard. The price does not convert that list into BS EN 1111.

Approved Document G is why a new-dwelling bath is a different specification from a £16 blender. Its route cites BS EN 1111:1999 and BS EN 1287:1999, which predate the 2017 scheme texts and are still those standards. The temperature side of that case is on the bath temperature page. The £16.89 Bohaner row is not that specification.

WaterSafe's "as little as £30" is a short burns piece about servicing and fitting close to the outlet. It does not split valve from labour. Kew's £30 to £120 is a ballpark for a TMV2 component, and that page says it is not a quotation. The scheme split is on the TMV2 and TMV3 page.

What older UK install figures were

Phillips and others, in Injury Prevention in 2011, reported Glasgow social housing. The valve was about £45. A simple fit, through a bath panel, was about £103. A complex fit was about £260. Those are 2008 prices, and a landlord programme is not a 2026 catalogue. A panel that lifts matches the simple fit. A built-in bath is closer to the complex one. Labour can exceed the valve, and the pounds do not travel forward.

Kew's "under an hour" applies when the bath is already out. A bath still fitted is a different day. That page also treats a full refit as making Part G apply, which goes further than the Part G FAQ. The FAQ places existing homes outside the 48°C trigger. Price the access you have, and check a refit claim against the FAQ.

This page has no multiplier from £103 in 2008 to October 2026. Doubling the old sum would be a guess. A quote far from those figures is a different year and often a different valve. Ask for today's price, and leave Glasgow in the margin as history.

Costs the listing does not include

Kiwa's Type 2 note says to fit isolation valves when the maker did not supply them, and it recommends strainers close to the inlets. The valve has to sit where you can maintain it. None of the inline included-components lines lists strainers or isolation valves. Zamery's included line is a "shower tap", the bar itself, not a hose, head and riser assumed on top.

A £16.99 kisimixer with no isolation cannot be cleaned later without stopping a larger part of the system. That labour sits outside the shelf price on fitting day and on service day. This page has no current shop price for a strainer or a service valve.

Commissioning is further time: flush, measure the mix, and record the setting. A £13 body in a ceiling void turns the next clean into opening the ceiling, and WaterSafe treats an unreachable valve as a mistake. The commissioning page owns that first sequence. Scheme paperwork, where a scheme is required, is another line. None of it sits in the £12.69 cell.

What a low price does not prove

A low shelf price shows the figure in the saved file. It says nothing reliable about cold-water failure. Coleniny at £18.99 has 4.6 from 87 reviews, and one UK account describes about 70°C from a 30°C setting after failures at 12 to 18 months. One account is one person, not a rate for every valve near £19. The stars did not stop that account. Stars are not a safety line in the budget.

GETSHOWERSET at £179.99 states a five-year limited support claim, water-powered LED knobs and a 1/2 inch connection. It does not state TMV3, a mixed range or a cold-failure result. About £167 above Wincal buys the concealed form. If the brushed-gold finish is offered as the reason it suits a care bath, ask which scheme mark is printed. Finish is a colour, and the file omits D08.

Take the live amazon.co.uk price, because a saved listing ages. Add isolation, strainers and the access in front of you. Add labour only after someone has seen the job, and leave the 2008 figures in the margin. Add a scheme line only when you must meet TMV2 or TMV3, then buy a valve that prints the mark. Rankomu at £15.99 is the best value when you want a printed stop near £16. Zamery at £35.91 is a different form. Both leave labour blank.