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Discuss Trevi boost shower mixer, hot water flow only. in the Plumbing Forum area at PlumbersForums.net

Razor

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Hi,
Our shower only gives out hot water. The volume control works fine but the temp control turns fully both ways without any cooling effect. A plumber has tested and said that cold water is reaching the mixer ok,( the separate bath mixer tap below works fine with hot and cold ). The plumber said it was the cartridge and said he would order the part, did he mean the half inch cartridge part 096164800 or did he mean the booster cartridge, I have been unable to contact him since.
Thanks
Ray.
 

Stu-B

Active Member
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Probably the thermostatic cartridge, from your description (albeit a tad vague) sounds like the shower isn’t mixing the hot and cold water to the desired temperate.
 

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