There's also a pink for 1/2"- 2" waterlines and sprinklers, green for oxygen lin...

		grawprog on Jan 28, 2023 \| parent \| context \| favorite \| on: Six doctors swallowed Lego heads (2022) There's also a pink for 1/2"- 2" waterlines and sprinklers, green for oxygen lines and grey for stainless steel pipes.