Stainless Steel and Bronze Pumps
Experience commercial-grade performance with Little Giant Stainless Steel and Bronze Pumps (S-Series). Built to handle demanding continuous-duty applications, these premium pumps provide exceptional corrosion resistance and maximum heat dissipation. Perfect for water displays, large water features, and biological filtration setups, the S-Series is the go-to choice for pond professionals who demand long-term operation under tough conditions.
Premium Construction Features of the S-Series Lineup
Whether you're operating the high-flow S1200 or the compact S320, the Little Giant S-Series stands apart from standard plastic pumps through superior material choice and motor design:
- Oil-Free Motor: Utilizes a Permanent Split Capacitor (PSC) motor that requires no oil lubrication, making it 100% safe for expensive koi, pond fish, and aquatic plants.
- Harsh Water Tolerance: Built to withstand diverse water conditions, making it safe for freshwater configurations, marine saltwater applications, and warm water environments up to 110°F.
- Flexible Installation: Can be run completely submerged or used inline in an open-air setup (installed below the water line). These pumps operate smoothly whether placed horizontally or with the volute facing downward.
- Heavy-Duty Components: Every model comes standard with a 20-foot grounded power cord, an adjustable manual flow control on the discharge, and built-in automatic thermal overload protection.
Frequently Asked Questions
What are the inlet and outlet thread sizes for these pumps?
The plumbing connection sizes vary depending on the horsepower and flow rate of the specific model:
- Little Giant S320: Features a 1/2" FPT (Female Pipe Thread) intake and a 1/2" MPT (Male Pipe Thread) discharge.
- Little Giant S580, S900, and S1200: Feature a larger 3/4" MPT intake and a 1/2" MPT discharge.
These standard plumbing threads allow you to quickly adapt the pumps to flexible vinyl tubing or rigid schedule 40 PVC pipe configurations.
What does the Little Giant SPB1 Mounting Bracket do?
The Little Giant SPB1 Positioning and Mounting Bracket is an optional heavy-duty base plate designed specifically for the S580, S900, and S1200 models. It secures the pump firmly to your floor or skimmer basin, dampening mechanical vibrations and preventing the pump from tipping over or shifting from heavy plumbing tension. (Note: The SPB1 is not used for the smaller S320 model).
Can these stainless steel pumps be mounted vertically?
You can operate these pumps horizontally or vertically with the volute pointing down. However, you should never mount them with the volute pointing straight upward, as this layout traps air blocks inside the chamber and prevents proper internal motor cooling.
