I recently purchased an Aqua Pro 1/2 HP model SEP-500, but it has a 2" and 3" combo outlet. My existing sump plumbing is 1-1/2". Can I use a 2" to 1-1/2" adapter to fit the new pump? Would it affect it in any way? Or do I have to rip everything out and install 2" pipe? The sump pump is used for rain drainage ( sometimes up to three days in a heavy storm or my wacky neighbor who leaves his sprinkler on for 3 days) and laundry water.