Liberty PC257-441 review
Liberty Pumps PC257-441 1/3 HP Sump Pump Combo (Model 257 Primary + Model 441 Backup)
By Tom Calder
A drop-in cast iron primary with a 12V backup, check valves and an alarm. It needs a pit at least 15 in wide and 18 in deep, and you supply the battery.
- Best for
- A 15 in+ pit and a cast iron primary
- Skip it if
- Your pit is under 15 inches wide
as of Nov 14, 2026, 5:36 PM ET · Details
Product prices and availability are accurate as of the date/time indicated and are subject to change. Any price and availability information displayed on Amazon.com at the time of purchase will apply to the purchase of this product.We earn a commission if you buy through the retailer links on this page. It doesn't change our verdict. How we make money →
Researched, not used. We haven't used this product. This review is built from the maker's specifications, owner reports and our own sizing.
What we like
- Cast iron 1/3 HP primary plus backup in one assembly
- Check valves on both pumps; alarm with 24-hour silence
- Meets California CEC standards (maker)
Worth knowing
- Needs a 15 x 18 in pit
- Battery not included
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Who shouldn't buy this
Don't buy it if your pit is under 15 inches wide.
Key specs
| Type | Primary 257 (1/3 HP) + 441 12V backup |
| Flow (maker) | Pump curves only; no GPH stated by maker |
| Battery | 12V; battery sold separately (Group 27/31) |
This is a Researched review: we haven't used this product. We check every specification against at least two independent sources, re-check the US price on a schedule where we can track it automatically, and say plainly who it isn't for. Commissions never change a rating.
If this isn’t the one
Best for A pre-matched primary and battery backup pump pair for a basement with a standard sump pit
as of Nov 14, 2026, 5:36 PM ET · Details
Product prices and availability are accurate as of the date/time indicated and are subject to change. Any price and availability information displayed on Amazon.com at the time of purchase will apply to the purchase of this product.
Best for Replace both pumps in one go
as of Nov 14, 2026, 5:36 PM ET · Details
Product prices and availability are accurate as of the date/time indicated and are subject to change. Any price and availability information displayed on Amazon.com at the time of purchase will apply to the purchase of this product.
Best for Replacing a pump and adding backup in one go