What is the flow rate for low pressure hot water system (not a combi boiler system)??

I am not sure if this help as I have combi boiler and the flow rate through this is great changes from shower flow to steady flow

What is ACS certification?

Academia constiintei de sine is a French sanitation certification body, which mainly tests plumbing equipment products according to the standards issued by AFNOR (Association Francaise de Normalisation).

Does the 22mm version come with a female to male adaptor as I need a 22mm male version.

Mine came with an adaptor so that it will fit male or female thread

I googled and found out that the tap style i have is: 'bristan - manhattan monobloc kitchen sink mixer - chrome' - will it fit? not sure how to tell.

If there is any threaded end to it you should be able to fit it easily as it comes with several different adapters to fit all sorts of faucets. However I did look at the tap you described and it is hard to say (by just looking at general images) whether there is any part which you can remove (unscrew) and replace with this little gadget.

Faucet Aerator Chrome

Product ID: 47906567

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Details

Brand
Waternymph
Material
Chrome
Finish type
Polished
Specification met
energy
Thread size
22mm

💧1.8 GPM dual water flow

🔄360° swivel rotation

⚙️5 adapters for universal fit

Description

💧 Twist, spray, save — the faucet upgrade you didn’t know you needed!

CHROME ELEGANCE - Polished chrome finish adds a sleek, modern touch to your kitchen setup.
DUAL FLOW MAGIC - Switch between a soft bubble stream and a powerful spray to suit every kitchen task.
SEAMLESS 360 SWIVEL - Effortlessly rotate your faucet for ultimate sink coverage and convenience.
ECO SMART WATER SAVING - Cut water usage by 30-70% without sacrificing performance—save money and the planet.
UNIVERSAL FIT ZERO HASSLE - Five versatile adapters ensure compatibility with most standard faucets (20-24mm threads).

The Waternymph Dual-Function Faucet Aerator features a 22mm female thread with five adapters for broad compatibility, a polished chrome finish for style, and a 360-degree swivel for flexible use. It offers two water flow modes at 1.8 GPM, combining efficiency with water savings of up to 70%, certified for energy efficiency.

Specifications

Manufacturer	Waternymph
Part Number	FA-22female-swivel-c
Product Dimensions	2 x 2 x 2 cm; 30 g
Item model number	FA-22female-swivel-c
Size	22mm Female Thread - Swivel - Chrome
Colour	Chrome Finished
Finish	Polished
Material	Chrome
Item Package Quantity	1
Flow rate	1.8 Gallons Per Minute
Handle material	Brass
Plug profile	deck mount, wall mount
Certification	energy
Batteries included?	No
Batteries Required?	No
Item Weight	30 g

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