Basin waste

[polomints]

I have a Screwfix slotted basin waste fitting product 41619 the nut to fix it into the basin is huge.
Any idea what type spanner to use and where to obtain, I have fitted it hand tight but get a leak under basin.

 

[Newboy]

A decent set of grips
https://www.screwfix.com/p/bahco-wide-jaw-slip-joint-pliers-9-229mm/35941

and one of these
https://www.toolstation.com/shop/p37534?table=no

 

[Hot&Cold]

Any idea what type spanner to use and where to obtain,

if this is a one off job, cheap 10 or 12 inch water pump pliers will be enough. SF do cheap

You may need to take the waste fitting apart and apply a smear of lsx to the usual surfaces that like to leak

 

[muggles]

I just use a decent quality sealant in the right places and do them up hand tight. Never fails