need help removing the valve/cartridge from underneath

[mrcheap]

long story short my hot water valve is stuck off so I decided to replace the whole valve.

so i tried tackling the job tonight but without success

the whole valve assembly needs to be replaced

it would be great to remove from the top but there's a washer that sits on the valve on top of the table

so even if i was to remove the housing on the top, the valve assembly is still sandwiched to the table by the washer and the nut underneath

the nut underneath is impossible to remove plus its super tight. i was going to use a shower wrench socket but the size is not big enough.

there's also a plastic tool from pfister which is used to install but i can not get enough leverage to remove from the bottom. should i blast this nut with wd-40 and then try again

any other tool out there that will be helpful?

thanks!

 

[Mr_David]

split the nut by drilling it. start with a 1/4 or 3/8 bit.
then larger if needed.
make sure you use Eye protection