You only need 2 hole if you want filter tap at counter top

Drill a 35mm diameter hole in the middle, and one 35mm at the side for filtered water

Some filtered water tap is smaller diameter from 15mm to 25mm, some design has a wider bottom sitting plate that can cater for 35mm hole

You can refer to this design


So you need to see the filtered water tap design

For example, this type of tap can use for 35mm hole

i'm just using this nano sink from taobao https://item.taobao.com/item.htm?spm=a1z09...._u=a2pscjsd65d0 since i'm using undermount, i cant choose those sink with faucet cutout

i'm not sure why you need anti condensation here in malaysia, it's not like we have winter here or you are pouring ice to your sink always

and you dont need 5mm thickness lip, although the thicker the better, but you see those old house stainless steel sink is just 1-2mm and they have been using for so many years without issues, so i dont think there is a need to spend so much, just get a 304 stainless steel with 3mm thickness is sufficient

if you dont want to reposition it, you can either use flexible hose or you can use different angled pvc pipe to connect the sink to drain pipe

means the lip of the sink is 3mm thick, the middle part of the sink (the area where you put your plates) is 1mm

see the image below, the red area is 3mm, the rest of the sink is 1mm

the IG or XHS recommendation is from china or places with 4 season? as far as i know we dont have this problem here because our water temperature is very consistent throughout the year and i never had encounter such problem from my hometown house to my current old house is just using bare stainless steel sink, unless you always pour cold water to the sink then it might be different story, but those rubber coating is good for sound dampening of the sink though, i never had to worry about condensation, but water leakage from countertop is a more serious problem

if you want to do undermount sink, better get the middle one, the other 2 also can, but you need to make sure the hole cutout is matched nicely with the sink

add on accessories can buy separately from taobao at the same price or cheaper, the faucet from local seller is mostly from china also, so not much difference, the faucet i got with the sink suffer leakage problem after few days, then i just change the catridge to a new one from shopee, no more leaking since then, the faucet build quality itself is surprisingly good comparable to those faucet in local market, the cartridge i would say is just my bad luck

this is the cartridge i'm talking about, it is inside the faucet, and most of the time this is the cause of leaking which can be fix by ourselves


the reason i'm saying the sink with cutout is not suitable for undermount is because there might be water retention near the cutout area and could leak to the cabinet below

the recommended way for undermount should be like this, if the sink has no faucet cutout then you can just drill faucet hole at counter top without having to align with the cutout at the sink as long as the hole is not too near to the lip


if you buy those with cutout, your contractor might do it this way since it is easier to do cutout and installation

notice the area near the faucet is flat, so there might be water retention there and water might seep underneath the cabinet carcass from there

if you want to use this type of sink and do it like the recommended way, it is possible but you have to wait for the sink to arrive then measure the cutout and then when drilling hole for countertop also has to be precisely align with the hole at the cutout

that is if you need to do undermount sink, but if you go for top or flush mount then should be no problem since all type of sink can fit top and flush mount

if you really need to defrost a whole chicken, you should cut it to smaller chunk and use microwave defrost to save your time and water, if you really worry about condensation, it is better you do waterproof in your cabinet carcass and install ventilation hole at your cabinet door, then you will have more choices to choose from, i waterproof my cabinet carcass using polyurethane and even fungus/mold wont grow on it