I think you could also achieve this using a water-sealed steam gasometer instead of a bladder. https://en.wikipedia.org/wiki/Gas_holder#Water-sealed_gas_holder

I think you could also achieve this using a water-sealed steam gasometer instead of a bladder. https://en.wikipedia.org/wiki/Gas_holder#Water-sealed_gas_holders https://en.wikipedia.org/wiki/Gas_holder#Water-sealed_gas_ho...