I'm finishing off the downstairs bathroom, and have a 35mm chrome flush pip e going into a Dudley Phantom cistern designed for a 40mm flush pipe (the c istern will be concealed but the pipe will not). Don't ask why
I replaced the white plastic union nut with an identical one with a bigger shoulder, tighter on the pipe. Hard washer inside that, conical rubber wash er at the top. The rubber washer isn't a very tight fit so I put silicone i n there as well. Left it a day before turning the water on. It leaked.
So I took it apart and dried it out, filled the union nut with silicone, re assembled and left for a day. Last night it seemed fine; this morning just a smear of water, so still leaking. Took it apart again. had to go to work but will have another go tonight.
Does anyone have an alternative suggestion to filling the union nut with si licone and hoping it works this time?
Many thanks Richard