This question is regarding Trevi 1/2"" DX 1/4 Turn Flow Cartridge, Anti Clockwise Close

Trevi Therm Built-In 300 - Flow handle very stiff.

My Trevi Therm Built-In 300 mixer shower was installed in 1998, and until 3 days ago has been perfect, but now the Flow control has suddenly become very stiff and hard to turn.



I assume it is one or both of the 1/2 inch flow cartridges that are seizing up. If so do I just dismantle it and install 2 new cartridges, are there any other parts that I would need to replace as well? The temperature control is fine. I still have the Installation instructions manual, which has details of how to take it apart.



Thanks in advance for your help
Asked 11 years ago by Anonymous

 Yes almost certainly the on/off cartridges causing it to stiffen up, it makes sense to change them both and you can then keep the better of the two old cartridges as a spare

Answered 11 years ago by The Shower Doctor

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