Foot valve for shower?

[True_temper]

Any one seen or made a foot valve to turn the shower on after the mixing valves? When boondocking it would be nice to control the shower head with a foot operated valve. Leaving both hands to wash the soap out. It’s a pain to turn the head on and off.

[MrWizard]

these are for air, could probably be use for water

https://www.ebay.com/bhp/foot-pedal-valve

[SidecarFlip]

Excellent idea. Any idea what or how to? Would save water too.