After balancing the flows, one of these blighters has started to drip very slowly from under the red cap. It feels loose to turn, so I suspect the seal around the spindle is to blame. It won't be 'worn' as such, as they don't get fiddled with for years, but this tiny adjustment was seemingly enough to set it off :-(
There's another two controllers which are very stiff to turn, so I'm not sure they even open up the desired amount when set - I'd like to get to them to lube them or slacken the gland nuts. So, is there a way to access the spindle underneath the head, and - if so - will they be tweakable, like a normal gland nut on, say, a radiator valve. Ie, is there an adjustable nut there?
Thanks.
There's another two controllers which are very stiff to turn, so I'm not sure they even open up the desired amount when set - I'd like to get to them to lube them or slacken the gland nuts. So, is there a way to access the spindle underneath the head, and - if so - will they be tweakable, like a normal gland nut on, say, a radiator valve. Ie, is there an adjustable nut there?
Thanks.
