 Well, I've been talking about Zoller pumps for years now, being the gold standard in sump pumps and battery backup systems. The sump pump is the heart of your groundwater protection system, and Zoller's the only name I'd trust to keep my basement dry. The Zoller Model 63 Primary Sump Pump and the Zoller Aquanaut Fit 508 Battery Backup System installed by a factory-certified installer are a guaranteed water protection plan.