The Salem sump anti-reflux valve.
Shapiro
M J
MJ
Minor
C B
CB
Keegan
M
M
D004867:Equipment Design / Q000592:standards*; D004869:Equipment Safety / Q000592:standards*; D006801:Humans; D007441:Intubation, Gastrointestinal / Q000592:standards*; D007507:Therapeutic Irrigation / Q000592:standards*