Yes you can upgrade the unit to a bigger production unit, and it can be done without sacrificing water quality......The biggest you can go with sacrificing water quality would be a 75gpd DowFilmTec membrane which has a 98-99% rejection rate.....Once you step up to a 100gpd membrane your rejection rate will drop to somewhere around 92-93%.....
To make the upgrade you will need to get a 75gpd membrane and a flow restrictor for 75gpd membranes......Super easy upgrade.......SignGuy will tell you as well.