| Shutoff Head (ft.): | 17.5' |
|---|---|
| Type: | Automatic |
| Voltage: | 12v |
| Flow at 5 FT Head: | 23 GPM |

They are similar pumps however the 508 is a bit stronger of a pump. Please see the product overviews to reference the differences and performance curves that each works off of. https://s3.amazonaws.com/s3.supplyhouse.com/product_files/Zoeller-507-0005-Product-Overview.pdf https://s3.amazonaws.com/s3.supplyhouse.com/product_files/Zoeller%20-%20508-0005%20-%20Submittal%20Sheet.pdf