Flexi hoses under kitchen sink

[JONXLR8]

Forgive the basic question but I want to check I'm doing this absolutely right.

I want to temporarily completely remove the kitchen sink (which wasn't fitted correctly by others) so I can seal/treat the wood worktop and make adjustments for the under counter clips.

To get to the point, I'm wondering what size spanners I need and where exactly I should be breaking the link in the water pipes so to speak.

Should I be undoing at point 1, 2 or 3 in the photo? Obviously not 4 unless I want to take a shower at the same time. I imagine 1 is best?

I've only got a limited selection of open ended spanners. The nut at point 1 is smaller than the other 3. My 19mm spanner is too small for that, but 22mm is too big for it and also too small for the other 3 points.

Am I right in saying I need 20mm and 24mm spanners?

Thanks in advance

 

[oldbutnotdead]

You need spanners to fit at points 1 and 2. You'll be holding 1 still and winding 2 anticlockwise (looking from below).
Your best weapons will be a set of mole grips and a set of water pump pliers.

 

[JONXLR8]

Thanks for your reply. I do have a set of mole grips but was erring on the side of using spanners as I'm conscious that if grips slip it could round off the nut

 

[oldbutnotdead]

You can buy rather lovely pipe spanners (like these https://www.toolstation.com/split-ring-compression-fitting-spanner/p23418 but for a one-off an adjustable and the mole grips will be fine. Lock the mole grips good and hard and they won't slip (probably will mark the nut but meh)

 

[JONXLR8]

Mission accomplished, cheers.