EnvirOx E2B2 Wall Mount Dispensing System for H2Orange2 Concentrate 117. The wall mounted E2B2 easily fills application containers in all sizes and shapes with either light-duty or heavy-duty dilutions. The E2B2 features: Easy servicing and tip change- no need to remove from wall; Easy bottle loading and removal; Low Foaming; Smaller wall coverage; ASSE 1055 certified and IAPMO certified.