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  1. B

    Fix hot water spike in shower on toilet flush etc

    Add on question on the same topic! Someone was taking a shower in the second shower and they complained that the showers went cold for “a few minutes” - I assume because someone else was taking a shower upstairs. If I had installed a Posi-Temp would the flow have just stopped until the hot...
  2. B

    Fix hot water spike in shower on toilet flush etc

    Would just replacing the cartridge potentially help? Or are those older cartridges just always going to do this? Edit: I think the answer to this is a firm no :)
  3. B

    Fix hot water spike in shower on toilet flush etc

    Thanks for the welcome guys! yah, that’s a bummer... the hot water spike will happen with other fixtures as well. I guess I was hoping that “universal “ rough ins from moen gave you some flexibility.. one shower will be easy to access, the other will not. Thanks for confirming everyone. I...
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    Fix hot water spike in shower on toilet flush etc

    Hey everyone, I have an older condo (1977) with newer showers (probably mid 90s) and when the toilet flush the hot water spikes. My research suggests that the newer cartridges would fix this. The current fixture is a Moen with what I assume is a 1200 series cartridge behind it. If this is...
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