WTF are you talking about??
Is there any need for that, really, it's a simple question to all but a dullard.
OP,
We have an Insikearator hot & cold tap, it really is the ****, it's great.
The only minor down side is trhe cost of filters, over £80 for a box of two, which needs replacing once a year, so it's about £40 a year on filters.
With ours I recently (last night) installed a digital 7 day timer so I can have it switched off during the night, when we are all at work etc, thus saving power as it's not constatnly cutting in & out.
In summary, worth every penny IMHO.