The best replacement for diverter is bov.

The best alternatives to diverter are rated as following:
★★★★★  bov
★★★  blow off valve
★★  jetovator
★★  diverter

Your alternative for diverter is not listed? Suggest!
Speaking about diverter, one probably shouldn't forget about hand shower.

Other search terms related to diverter and their ratings are:
★★★★★ hand shower
★★ tap
★ handshower mount
★ handheld shower
★ shower head
hand shower mount
shower head and spout
handshower
removing section of downspout
You have in mind a companion for diverter and it is not yet here? Propose!



Google Trends

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diverter
bov
blow off valve