No need.
1. The reasons for solar water supply and drainage pipes include PPR, PEX, aluminum plastic, Kaitai, etc. PPR will have residual odor after hot melting, but it is not toxic. there is no need to add scent. The rest of the odor comes from the rubber seals of the pipe fittings.
2. It's the smell of beef tendon sealed in solar vacuum tubes. Various flavors will be produced when the water becomes hot. Please note that solar water cannot be drunk directly.