On Wednesday, February 21, 2018 at 10:46:40 PM UTC, Fredxx wrote:
On 21/02/2018 22:14, Keith Martin wrote:
replying to Davidm, Keith Martin wrote:
Contact Drayton and they will advise details of your nearest stockest

4 years ago!

For a non hoboners club link:
http://uk.d-i-y.narkive.com/hE4d0Us4...n-drayton-trv4

For anyone else stumbling across this - Drayton advise screwing the seal down an eighth of a turn every year (using long-nose pliers) then changing it when it bottoms out.