(3) Wish Items:
1) Generic 3-way valve symbol (no handle, no lever, just 3 triangles)
2) Tempering Valve/Mixing Valve Symbol (looks like motorized 3-way valve but replace boxed M with Boxed T)
The tempering valve is often used prior to eye wash fixtures.
3) Mv-Parts for the various styles of eye wash/shower fixtures (Sink Mounted Eye Wash, Wall Mounted Eye Wash, Shower Stand Alone, Shower & Eye Wash Combo Stand Alone, Wall Inset Eye Wash, Handicapped Accessible Wall Mounted Ey Wash, etc)
Maybe some other engineers may have better suggestions or would like to post a sample; I don't have one handy.
Can be both plumbing, piping &/or schematic symbols/Mv-Parts/Fixtures.
JPB