Hi we are looking to install a larger shower with 2 shower heads, the bathroom company's we have had round have mentioned we would need to upgrade our water pressure tank
We currently have a tank labelled -180l low pressure tank with working height of 7.6metres. our water pressure cause's us no problems at the moment
What are our options/costs on achieving the 2 heads?
Would changing to gas be a better option?

Thanks

Linkback: https://www.plumbers.nz/q-and-a-baths-and-showers/64/two-shower-heads-in-one-shower/403/

This will never work adequately with a low pressure cylinder. You will need to upgrade to a mains pressure cylinder and also probably increase the capacity of it too.