This isolation valve attached to my toilet has started to leak, it's very hard to tell the source it's damp around the plastic at the very top but also more so damp around the near top of the valve (arrows pointing to each section). I know nothing about plumbing but I've tried tightening and it hasn't helped. I've ordered a new isolation valve and ptfe tape for the plastic part but the one in my photo looks to have an extension. Just curious is this a different type of isolation valve or has it been modified with whatever that extension is. Altogether if there's a better component I can replace it with I'll happily do so but it's maybe a 4cm gap so not much room for one of these flexi tap connectors. Thanks
It's just the way it's made, just fit a new one,lot easier than trying to repair old one. https://www.screwfix.com/p/pegler-straight-service-valve-15mm-x/19933
After replacing fibre washer, be careful not to over tighten the nut on service valve as very easy to strip the plastic thread on the inlet valve Also take care not to cross thread the nut. Both of these mistakes will more than likely cause a leak and render the inlet valve unusable and a replacement will be your only option The fibre washer does the sealing task and the nut just holds the 2 parts together So hand tight and then maybe a half to 3/4 a turn with a spanner. Turn water back on and check for leaks, nip up a little more if needed
Thanks for the advice I'm waiting until this weekend so I have time to run out to screwfix should I mess up the job.
The great thing with this forum is that should you need any further advice, we are open at weekends as well, in fact, every single day of the year, including bank holidays .....good luck
The plastic threads on the fill valve appear to be all chewed and damaged. Maybe grips have been used on them? Best a new fill valve and buy one that has a brass tail.
The threads still good the chewed part is plumbers mait I had lying around just slapped it on to reduce the leak whilst I got the parts, I took it off again for the photo just didn't do a good job, I'll clean it all off before applying the ptfe and new parts. It does seem to leak a little from both parts I pointed to in my photo I'm hoping this is just the washer and no damage to the plastic inlet.
No need to use ptfe tape on any of the joints. It is only for male joints - like radiator valve tails into rads, etc.
Bit of a late reply I managed to sort this last weekend thought I'd just thank everyone for their help; It turned out to be two faulty parts. The fiber washer in the service valve had broken and the valve itself wasn't in the best of shape so I replaced this and the plastic thread hidden inside the old valve was completely butchered on the inlet pipe for the toiler so I ended up replacing that too. Thankfully screwfix had the exact part in my local store. I couldn't get the new service valve to seal nicely it still had a leak, fortunately my partners father popped over for an afternoon visit; he's spent the past 20+ years plumbing in boilers etc, he took the new fiber washer out that came with the new valve and filled it with ptfe tape instead. It's been over a week now and it's not leaked a bit. Again cheers to everyone for your advice, I'm sure I'll be back again with something else in the future.
In all fairness I purchased two separate fiber washer along with the one that came with the new fitting and none of them could seal it correctly. He's a specialists in large industrial boiler installations so I trust him when it comes to using the tape over the washer. I guess time will tell if it's the correct method.
It is not the correct method it is a bodge. There has to be something else not right for the the fibre washer not to seal, the tail from the cistern could have damaged threads, the bolofix and fibre washer are not coupling up to the tail being as the new one is a smidge shorter. Do it once, do it correctly and that is without ptfe tape which is bodging it.