Well, I don't believe that will solve your problem, you could try pulling 1 pump at a time out, looking for a defective one and replace it with a non submersible type with a plastic suction pipe.
Or easier, disable the relay to each pump in turn.
Well, I don't believe that will solve your problem, you could try pulling 1 pump at a time out, looking for a defective one and replace it with a non submersible type with a plastic suction pipe.
Or easier, disable the relay to each pump in turn.