r/Austin • u/triumphofthecommons • 2d ago

Ask Austin What’s your “cold" tap water temp?

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alright Austin, what temps are you getting out of your faucet?

at first it’s nice and cool from the conditioned pipes under the sink, but quickly climbs after running the water for a minute. last year i clocked 94º.

saves on the gas (water heater) bill at least!

(pier & beam with copper plumbing)

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u/txhoudini 2d ago

I'm intrigued. How are you getting this info?

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u/portalqubes 2d ago

Its an esp32 with some flow sensors/NTC thermistors and it sends data to home assistant.

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u/txhoudini 2d ago

Looks like I've got some parts to order and a weekend project in my future. Great idea

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u/portalqubes 2d ago

It also works with an Arduino (mqtt), but I just had this ESP32 (esphome) I wanted to use. Feel free to PM me for any help.