Stuck Flathead Valve on Toilet Supply Line

portach king

Hi lads and lassies,

I'm in the middle of a DIY bathroom job and need some help. I'm trying to replace my broken toilet siphon, but I'm completely stuck at the first hurdle - shutting off the water supply. The culprit? A stubborn flathead valve on the supply line that refuses to budge.

I've been wrestling with this valve, but it's like it's glued shut. I've tried all my usual tricks:

• Muscle power: Pushing and turning with all my might, but it won't give.
• Screwdriver: Using the right size flathead, but it's starting to strip the head.
• WD-40: Drenched the valve in lubricant, but still no movement.

• Any ideas on how to coax this stubborn valve open? Are there special tools or techniques I'm missing?
• Should I try heating it up slightly (carefully, of course)?
• Should I just cut my losses and call a plumber (gulp)?

Any advice, wisdom, or shared misery would be greatly appreciated!

Thanks in advance!

tnegun

Can you turn off the cold supply to the taps/toilets in the hotpress?

MrMusician18

Drain down the header tank? That's what I'd do.

portach king

Thanks lads. I'll try both of those and see how it goes.

Lenar3556

I wouldn’t wrestle too much with it, it may start pissing out the front. Definitely don’t heat for the same reason.

There is likely another shut off in the hot press, turn off there and replace the isolation valve when doing the cistern repair.

portach king

https://www.boards.ie/discussion/comment/121779780#Comment_121779780

Perfect. That did it. Thanks again.