My widower mom is in need of two new sump pumps. She has a main and a battery back-up that have both burnt out due to running continuoulsy. She insists on the back-up as the house has been prone to power outages during storms. The PVC coming out of the existing sump is 1.5" that converts to 2", before check valve, on the way up and out of the basement. First question..is that transition acceptable? Second question is what brand of pump is recommended and what size. Her house is about 2000 sf with 2 baths. The rise is about 10 feet from the sump to where the PVC exits basement and begins horizontal/sloped output.