Help with turning off stopcock tap under kitchen sink please

[Phil999]

Hi,
Need to turn off the
water under sink via stopcock tap to replace a cistern flexihose, but finding it
hard to turn. Worried it might snap off ?
I tried putting wd40 into spindle
but it is at 90 degrees.

Is there anything I can do to work it free
please.
Is it ok to use a adjustable spanner against it ?

Thanks,

 

[townfanjon]

Yep it sounds like it hasn't been used for years, please be careful if you give it extra leverage . To be on the safe side , can you turn it off in the street and fit a new stop tap, it maybe less grief in the long run.

 

[joni os]

Slacken nut on packing gland. It will probably need repacking anyway. Old stopcocks invariably leak after being turned off and on.