Large fermenter Problem

[RabMaxwell]

Hello Daab i looked at the one in my camper it look's like a very simple pump. From what i can see everything that is in contact with water look's plastic. Not to worried about brass or bronze as i have tank fittings fitted that will be brass or bronze.I clean my fermenter with Antiformin's & it's never effected my fittings.The thing that might be a problem is that these pumps normally only work for very short periods. Using for long periods such as 5-7 days continuously. Cheers