GROHE Costa L Wall Mixer 31187001, Chrome

The GROHE Costa L wall mixer 31187001 is a chrome-finish, wall-mounted kitchen sink mixer with two handles and a swivel spout. Its wall installation suits sinks designed for this fitting, while the stated heater compatibility rules out open low-pressure water heaters.

At a glance

Wall-mounted design with two lever handles and a swivel spout.
The listing states a 200 mm spout reach and a flow rate of 13 litres per minute.
GROHE describes a StarLight finish intended to resist dirt and scratches and remain easy to care for.
The stated connection guidance permits closed water heaters, thermal and tanks, but excludes open low-pressure heaters.

Price

£51.20Save 28%

Reference price: ~~£70.69~~

Price checked: 14 Nov 2026

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Pros and cons

Pros

Swivel spout offers flexibility when using the sink.
Two handles provide separate left and right controls.
Metal construction and chrome finish are specified.

Technical specifications

18 specifications

Identity
Brand	GROHE
Model	Grohe Costa wall sink mixer, DN15
Model number	31187001

Installation and dimensions
Mounting type	Wall Mount
Number of handles	2
Number of holes	1
Spout reach	200 Millimetres
Spout height	4.63 Inches
Dimensions (D x W x H)	9D x 12W x 30H centimetres
Weight	1 Kilograms

Operation and flow
Handle type	Lever
Handle placement	Left, Right
Valve type	Cartridge Valve
Spout design	swivel
Flow rate	13 Litres Per Minute
Electric	No

Materials and finish
Material	Metal
Finish	Chrome

What to know before buying

The listing says the tap can be rotated in all directions, but gives no installation-clearance details. Check that the wall and sink layout allow the movement you need.
The stated heater compatibility excludes open water heaters and low-pressure devices. Confirm the existing system type before installation.

What’s in the box

Included

GROHE Costa wall sink mixer, DN15

Who is it for?

A good fit for

Kitchens with an existing or planned wall-mounted mixer connection.
Buyers seeking a chrome-finish mixer with two handles and a swivel spout.

Less suited to

Installations using an open water heater or other low-pressure device, according to the supplied warning.
Sinks designed only for deck-mounted taps.

GROHE Costa L Wall Mixer 31187001, Chrome · photo 2 — Additional product photo 2

Customer reviews on Amazon

4.5 / 5 · 400 ratings

5 stars75%75%
4 stars15%15%
3 stars5%5%
2 stars3%3%
1 star2%2%

Aggregate ratings lean positive, with most ratings in the five-star category, but a smaller share are lower. Without customer-comment evidence, these figures do not explain specific strengths or concerns. They indicate overall rating sentiment only, not how the tap performs in a particular installation.

Frequently asked questions

Is the GROHE Costa L 31187001 wall-mounted?

Yes. The listing identifies its mounting type as Wall Mount.

Can it be used with an open water heater?

No. The supplied warning says it is not for open water heaters or low-pressure devices. It is stated to be for closed water heaters, thermal and tanks.

How far does the spout reach?

The listing specifies a spout reach of 200 Millimetres.

Does the tap have a swivel spout?

Yes. The listing describes the spout design as swivel and claims 360° flexibility.