Gravity driven plate heat exchanger for DHW

[HughF]

On 08/09/2025 at 13:18, JohnMo said:

If you are pulling from the bottom and injecting higher up, you will be pumping up hill. Depending on pipe runs there may be a thermosyphon formed as hot water cools, this will travel downhill, so you will need check valve downstream of pump.

Yep, I use flap types for this task with the flap falling down under gravity.