Suggestions for rapid cycling pump

I have a Pro Flo submersible pump in an 18" diameter sump (not my design), backed up by an Aquanot II battery system (Thanks to suggestions here) The main pump has an unadjustable switch and cycles in about a 7" range. In the worst weather we've had in 5 years in the house, the pump cycled 14 seconds 0n, 15 seconds Off. Right now, it's about 10 seconds On, 65 seconds Off. I think the best alternative would be to increase the sump pit size, but I'm an 'old retired guy' and do not look forward to cutting concrete and digging. Any suggestions? By the way, the primary pump has lasted 5 years, but I don't sleep well.

My sump pit is fed from the 4" perimeter drain and the 150 linear feet of drain acts as significant storage capacity. I adjusted the sump so it only starts when the perimeter drain is full and stops when the drain is empty. 150 feet of drain has a lot more capacity than one might expect by increasing the size of the pit.

Quick math tells me that my perimeter drain can store 100 gallons. Your current pit stores about 8 gallons.

Another thing to consider is that you might be pumping deeper than necessary. A lot of people do this with thinking about it.

If it is not already, i would raise the pump (set it on a block or a couple of pavers) so that the standing water level can rise to 6"-8" below the top of the slab. Leaving the foundation drain partially full will often reduce the inflow of water.

cacher_chick said:

Leaving the foundation drain partially full will often reduce the inflow of water.

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I have concerns about leaving water in the perimeter drain and scum or sediment building up. By letting it fill and then drawing it down, it does a more complete and thorough flush.

LLigetfa said:

I have concerns about leaving water in the perimeter drain and scum or sediment building up. By letting it fill and then drawing it down, it does a more complete and thorough flush.

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I guess if you have any "dirty" water coming into the basin then it might be a concern.
Most of the houses I go in are over 20 years old and have nothing but crystal clear groundwater in the sumps. Most of the older houses have clay tile perimeter drains with clay sump pits and still I have not noted any problems.

Thanks for your suggestions. (Why didn't I think of that?) The water I have coming in is very clear, and I intend to set the pump so that it completely empties out the drain tile and goes just slightly below that so it flushes out completely. I have about 100' of drain tile. Should add capacity easily. Thanks, again.

cacher_chick said:

I guess if you have any "dirty" water coming into the basin then it might be a concern.

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Both my softener and my iron filter dump into the pit, so yes, there is a potential to scum it up.