Unvented cylinder leak - help!!

[Powderkeg]

Hi all

A week ago I had an unvented pressurised hot water cylinder fitted (an Ariston Primo 210) by a fully qualified local plumber. He did a great job with the install, but unfortunately a leak has developed around the upper immersion heater. My plumber has been back to rectify the problem by draining the system and refitting the heater with a new seal, but to no avail, as the leak has started again.

Does anyone have any idea how to fit the heating element without it leaking? More importantly, why is it leaking in the first place?

I have uploaded a pic of the cylinder to illustrate..



My eternal thanks to anyone who can help with this, as myself and the plumber are both stumped.

[solarsmith]

hi there.
is the seal a rubber o'ring? if it is i would ditch it, and fit either a fibre washer oR you could you PTFE or a paste like jet blue. The o'rings tend to get squezzed out.

[rab1978]

dont no if this will help or not mate.i am a plumber and about five years ago i was working with a company fitting arriston unvented hot water cylinders and i would say at least 4 out of every 10 leaked at the immersor point. The problem was just bad manufacturing to me it sounds like it could be that again especially if it was a plumber that fitted your cylinder because he will no about ptfe taping and boss whitting the fittings and i take it he has done that. So i think thats the only answer.Let me no how you get on

[mrlennie]

Abit more dramatically you could ring the manufacturer if this is a common problem and (1) Demand a newer cylinder (2) demand them to reimburse the plumbers cost and pay for the new install.

Or take them to court for faulty advertising?

[mickandrews61]

Why don't you just phone up Ariston and get them out as its under guarantee.

[Plumbermurrieta]

Demand a newer cylinder

[PlumberLakeElsinore]

ask for a plumber of what is the best advice can give regarding for this matter...