leak resolved...sea cock in head. thankyouCheck stern shower had this issue with my 323 water was coming from leak in cracked shower sprayer.
leak resolved..sea cock in head. thankyou for adviceFresh or salt? Correlation with rain? if salt check cooling system while under pressure.
Toasts comments have merit also. Try turning off pressure water and see it it still happens.
You can also selectively turn off water at the manifold.
leak found...sea cock in head..thankyou for adviceLike French Toast said check the swim platform shower, both the nozzle and mixer valve.