Should I upgrade sump pump?
I live in Chicago area. We had the biggest rain last week which made our sump pump overwhelmed (it got activated almost non-stop) and shut down itself during the peak of the storm! We had to rely on the back up sump pump and also manually remove the water to the sewer sink to avoid flooding at 3am in the morning. The sump pump we have now in our basement is Barnes SP33 by Cranes, 1/3 HP, 1.5" dischage pipe. Our sump pit is 36" deep and 16" in diameter. The plumber suggested us to upgrade to a more powerful sump pump, like 2/3 HP, or even 1 HP to handle our water issue. However, we're not sure if that's the right solution, because we don't know if the discharge pipe can handle so powerful a pump. The discharge pipe is about 10 feet horizontally and about 8 feet vertically in the basement, and outside the house it's about 50~60 feet long, the size is always 1.5", most of it is the rigid white PVC pipe, but the final 15 feet are the black flexible pipe. Normally when the sump pump pumps out the water, we can hear some gurgling sound in the line, it seems to us the remaining water in the pipe has a hard time coming back to the pit. Can any sump pump experts answer our questions below please?
1. Is the discharge pipe too small or/and too long for the current 1/3 HP pump?
2. Which is the appropriate solution to our issue -- to increase the size of the pipe outside the house, or to upgrade to a more powerful sump pump?
3. There are a lot of small gravels at the bottom of our sump pump. Can they potentially clog the sump pump?
4. The sump pump is plugged to a wall outlet which is not GFCI. Is that a potential issue? Can we use a outlet board with surge protection for the sump pump?
Many thanks in advance...