By gosh! your actual pack is heavy. mine is 800 grams for 20 litres and there are packs a lot lighter than that. I can never understand why people use a Camelback. First you have the weight of the camelback itself, and then it carries a lot more water than you need to get between watering spots. I carry a plastic 330ml soft drink bottle which I just keep filling up as I go. I have never run out of water. You are carrying an extra 2 kilograms just so that you don't have to fill up on the way. When you do fill on the way you get nice cold water. My pack weight including water is just under 5kg.
That certainly is a small and light pack. Though gms/litre capacity it's similar.
I do explain that I like the airspeed back etc, which adds weight.
No I don't use a Camelbak. I use single use bottles and generally carry 1.5 litres or so.
On some Caminos though, it may be necessary to carry a lot more water, as there are no refill points.
Just watched Chris's awesome video on the VdlP. Link below.
He often carried 3 lites and 4 litres !
So I don't think we can be too specific.
Route, weather, personal needs etc.
I was interested to hear my rough water calc, is similar to Chris.
10 kms per litre. Though he adds a 3rd when over 20 kms.
And a 4th when over 25 kms.
Note though, that he was walking the VdlP in Summer!
Total pack weight is of course a trade off.
And a very personal thing.
As I mention on the video.
I could certainly shave off a kg (ish) with medical stuff, but sadly I need them.
And another kg with just using a liner, no spare pants, only 1 spare socks, and a few other items etc etc.
But I choose not to.
But well done on your pack weight!
Under 5 kg including water is very impressive and very light.
Though I think the link you shared might not be the one you intended to share, as it's 7.3 kg.
(40 litre pack)
Just looked again.
OK I get it. The 7.3 kg includes stuff you wear!
I'd be very interested to see the 20 litre version.
Interestly Chris's pack was 6.5 kg.
But I suspect part of that was a tripod and DSLR camera too.
So he was packing very light. It looks like a small pack.
Chris's video.
You need to have a spare 2 hours or so.
But it's really good.