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Thermostatic mixing valve buying guide

Updated: 16 October 2026

You are choosing a valve for a basin, a shower or a bath. In this amazon.co.uk set a small brass body sits between about £12.69 and about £23.99, an exposed bar is about £35.91, and a concealed valve is about £179.99. The outlet, and who will use it, decides whether any listing is the right class of thermostatic mixing valve. The Products Compared editorial team wrote this guide on 16 October 2026 from our [thermostatic mixing valve comparison](/hub/medical-protection/thermostatic-mixing-valve). We did not laboratory-test the valves. None of the nine states TMV2 or TMV3. A purchase through those links may earn us a commission at no extra cost to you.

You are choosing a valve for a basin, a shower or a bath. In this amazon.co.uk set a small brass body sits between about £12.69 and about £23.99, an exposed bar is about £35.91, and a concealed valve is about £179.99.

Our top picks

Zamery Zamery thermostatic shower mixer

Best overall

Zamery Zamery thermostatic shower mixer
9.5/10about £35.91
View offer
Rankomu Rankomu Rankomufmv79gowcg

Best value

Rankomu Rankomu Rankomufmv79gowcg
8.6/10about £15.99
View offer
GETSHOWERSET GETSHOWERSET 2WAY-LEDSV-1

Alternative

GETSHOWERSET GETSHOWERSET 2WAY-LEDSV-1
0.0/10about £179.99
View offer
On this page
  1. 1.Start with the outlet, not the star rating
  2. 2.Three forms in this amazon.co.uk set
  3. 3.Marks that are not TMV2 or TMV3
  4. 4.What you can still compare on an ordinary job
  5. 5.Which form to buy

Start with the outlet, not the star rating

Three jobs share one search. A basin, a bidet spray or a dog wash is water you can feel. A shower bar or a concealed valve is the control on the wall. A new-dwelling bath in England, or a care outlet where someone may not pull away from heat, is a third job this cluster cannot finish. The 48°C cap is on the bath temperature guide. Where a vulnerable person can be immersed, HSE guidance uses 44°C and names Type 3. If the job is care or a new-dwelling bath, leave the shortlist.

Three forms in this amazon.co.uk set

Seven listings are inline bodies. Wincal’s bullets never print a stop. The Zamery, at about £35.91, is an exposed bar with separate flow and temperature handles. The GETSHOWERSET, at about £179.99, is a concealed two-way valve with no review line. The shapes do not stand in for each other. One kisimixer review says it needs pipes and will not screw onto the tap. Bohaner says its G1/2 thread is unsuitable for 3/4 inch pipe, and its button is described as about 50°C, against 42°C locks on Coleniny, kisimixer and Rankomu.
Zamery Zamery thermostatic shower mixer

Testsieger

Zamery Zamery thermostatic shower mixer
9.5/10about £35.91
View offer

Marks that are not TMV2 or TMV3

NSF describes TMV2 as the domestic scheme against BS EN 1111:2017 and/or BS EN 1287:2017, and TMV3 as verification to NHS D08. None of these nine fields uses those names. The scheme split is on the TMV2 vs TMV3 page. Coleniny prints ASSE and CSA. Gold Tremax prints BS EN 1074 and 0.5 kPa, which is not a credible mains pressure. Grey Tremax prints BS, CE and 10 bar, on the same 4.3 from 428 as the gold file. Rankomu lists ASSE, NSF and UPC. kisimixer prints CE only. Wincal prints ASME B16.34 and MSS SP 80. The red button is a handle stop, and none prints a cold-fail volume.

What you can still compare on an ordinary job

Coleniny and kisimixer print 60–85°C hot. Tremax bullets print 50–95°C hot. HSE guidance asks for a store at 60°C, which both ranges include. Above those ceilings the lines have run out of stated range. One Coleniny UK review reports about 70°C from a 30°C setting after repeated failures. kisimixer reviews include failures within a week and after two months. Tremax themes include failures inside six months. Rankomu at about £15.99 is the cheapest row that still prints a 38°C stop, on one UK text among 15.

Which form to buy

If you can feel the water and the pipe is G1/2, stay with an inline body that prints a stop. If you want handles on the wall, the exposed bar is the form. If the outlet is a care setting or a new-dwelling bath in England, leave this set.

Common questions

Do I buy an inline valve or a shower bar?
Buy an inline body for a basin, a bidet spray, or a shower fed from a separate head. Buy the Zamery bar, at about £35.91, when you want wall handles and a printed 38°C lock. Buy the GETSHOWERSET, at about £179.99, only for that concealed two-way valve. The shapes do not interchange. A care outlet sits outside all three.
Does a 38°C button mean the valve is TMV2?
A 38°C button means the handle has a stop there. On several listings you press a red button to go to 42°C, or about 50°C on the Bohaner. TMV2, on NSF’s description, is a domestic scheme against BS EN 1111:2017 and/or BS EN 1287:2017. None of these nine fields names TMV2, TMV3, or those standards. The button and the scheme mark are separate facts.
Is G1/2 the same as 15 mm, and will it fit 3/4 inch pipe?
On these listings, G1/2, DN15 and 15 mm are the connection family the bullets describe, often near a 21 mm connection size. That is the half-inch pipe these bodies are sold for. Bohaner says the same thread is unsuitable for 3/4 inch pipe. A 22 mm bath run is larger than this cluster prints. Check the pipe you have before you order.
Is the cheapest brass body enough for a care-home bath?
Wincal at about £12.69 is the cheapest body here, and its bullets print no stop temperature. A care-home bath sits under healthcare guidance at 44°C and under TMV3, which this set does not state. HSE material names Type 3 where vulnerable people can be immersed. A low price and a brass body leave that specification untouched.
Why do two Tremax colours share one review count?
Gold B08ZMRPYGL and grey B08ZN4NRXT both show 4.3 from 428 reviews, and the sampled texts match. Count that pool once. Adding the figures to 856 would invent a second test. The specification blocks still differ: gold cites BS EN 1074 and 0.5 kPa, grey cites BS, CE and 10 bar. Read each block on its own colour.
What should I check on the hot-inlet temperature before I order?
Compare the printed hot range with the cylinder. Coleniny and kisimixer print 60–85°C. Tremax bullets print 50–95°C. Rankomu, Bohaner, Wincal, Zamery and GETSHOWERSET do not print an inlet range in the fields we hold. A store at 60°C sits inside the first two ranges. Above 85°C, or 95°C on the Tremax bullets, those lines have run out of stated range.

Related pages

Who each listing is for

How to read mixing valve marks

Thermostatic mixing valve

Bath thermostatic mixing valve: England’s 48°C rule

How to commission a thermostatic mixing valve at home

TMV2 vs TMV3: the UK domestic and healthcare schemes

Sources

Public UK sources named for this comparison. Updated 16 October 2026.

  1. NHS England, HTM 04-01 Supplement D08 (2017) (retrieved 16.10.2026)
  2. Approved Document G with 2024 amendments (retrieved 16.10.2026)
  3. Part G FAQ (retrieved 16.10.2026)
  4. The Building and Approved Inspectors (Amendment) Regulations 2009 (retrieved 16.10.2026)
  5. HSE, HSIS6 (retrieved 16.10.2026)
  6. HSE, HSG274 Part 2 (retrieved 16.10.2026)
  7. NSF, TMV2 and TMV3 (retrieved 16.10.2026)
  8. Kiwa, TMV testing (retrieved 16.10.2026)