I have owned my pool for nearly 2 years (first one) and I am planning to re-do some of the plumbing to add a dedicated vac and also installing automation in the form of the Viron Connect 10 system. As I have to remove all my pool equipment and take up the paving from under the pump enclosure all the way to the skimmer, I though I may change the suction from 1.5" to 2". Also, as the pool equipment will be de-installed and then re-installed I thought I may re-pipe in 2" as all the equipment supports it.
I have attached the drawings for the current and proposed changes. I am in Australia so sorry about the metric units, will remember to convert to imperial in the future.
The returns would be a major drama to upgrade to 2", hence I am willing to leave these as is. Is there any benefit to changing the suction line to 2" and re-piping the pad to 2" as well, or should I leave it be and just run my vac port line in 1.5" as well?