Water cooled farm feeding geyser water

If my understanding is correct the plants can consume water but will note give the heat energy consumed as the thermo regulator do.
This in theory means the plants can be used to remove the heat if you feed them hot water.
All the heat we have to deal with is the farm tiles itself
On my base I have a lot of hot water available and a big coolant pipe circling around my base using mountain dew as the the heat carrier. The temperatures are around 5-8 degrees.

The values for the testing chamber:

1. Coolant = water 5C
2. Temperature of the water for plants = 95C
3. Atmosphere = oxygen 1kg per tile
4. Pipes: radiant = copper, basic = granite, insulated = igneous rock

You can see the resulting temperature of the hottest farm tile on the screenshot.

https://i.redd.it/4v6szvuaisu11.jpg

Now you may think of it as a success. The plants are safely using 95 degrees water.
The farms takes 95C water but as it becomes stored inside the farm these 5kg water quickly start the temperature exchange with the tile which radiates the heat to the surrounding area so the real temperatures of the water inside the farms are around 36-37 degrees.
Is it a fail then? Not quite. There are few useful things about this system which can work in your situation.

1. 37 degrees is still something
2. As far as I know bathrooms don't care about the temperatures so if you are using hot water in your main system anyway then it's handy to be able to use the same water for the farms without cooling it down separately

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Also I'm almost have a setup like this: smelter is cooled by a petroleum. Petroleum is cooled inside a polluted water reservoir. Polluted water becomes steam. Steam is cooled down by the central cooling system. Hot water then goes to the clean water supply system. Excess heat goes to the cold biome. Ice in the cold biome melts giving me 100% of the water instead of 50% as by mining it.
So by this farm setup I'm always have 95C water and don't cause any problems to other systems and even removing some heat in the process.

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Hope this test was helpful.

Bonus content:
On the left - the shutoff system what will connect your child water circle to the parent circle using logic input without causing any issues on the flow of the parent circle. Top pipes - child circle.
This way I usually connect something I want to cool down to specific temperature to the cooling system and using thermo sensor as logic output.
On the right - fill your liquid pipe circle from the source without gaps or interrupting the flow.

https://i.redd.it/6oxejllx0tu11.jpg