I'm sure this has been asked before but new to the site and just need a bit of advice. Probably a bit stupid of me but had stopcock for my water supply to house replaced 6 years ago... the plumber at the time didn't tell me I should turn the water on/off at least once a year to prevent it from sticking (should've thought but didn't) hence it is now stuck fast! AND need to plumb in new washing machine (This I have done before)... have been spraying WD40 on the joint evey day for the past week but not made a scrap of difference! Any suggestions other than getting a plumber out?! PS I'm trying to turn it clockwise, hope that's right?! Thanks sorry if I sound a 'daft girly'!
In addition to what plumbob has said above, if you do get the stop tap free, when you come to open it again close it down by about 1/8th of a turn from fully open so that it doesn't "jam open" against its stop.