Wax elements are also used in thermostatic valves for faucets (to keep faucet temperature constant given variable hot and cold mains): <a href="https://rogerdickey.com/the-ideal-faucet/" rel="nofollow">https://rogerdickey.com/the-ideal-faucet/
rogerdickey · · focus · HN ↗
phyzome · · focus · HN ↗
rogerdickey · · focus · HN ↗