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Features That Reduce Maintenance Costs
Designed for long service life and easy maintenance, the Goulds 3656 features a back pull-out design that minimizes downtime. Because the rotating assembly can be removed without disconnecting the casing from the piping, maintenance crews can carry out inspections and repairs quickly, with no need to break pipe connections or realign the system.
The pump’s enclosed, dynamically balanced impeller delivers smooth, efficient operation, while renewable wear rings help preserve performance as normal wear occurs. Key wear parts, including the stainless steel shaft sleeve and the casing and hub wear rings, can be replaced individually, so you restore performance without the cost of replacing the entire assembly.
A standard Type 21 mechanical seal provides dependable, readily available sealing, with carbon/ceramic/BUNA as standard and alternative seal faces and elastomers available to suit your application. A packed stuffing box option is also offered. Finally, the casing can be rotated to change the discharge orientation, giving installers more flexibility when fitting the pump into existing piping layouts.
What the 3656 Is Used For
Available in all-iron or bronze-fitted construction, the Goulds 3656 is a versatile general-purpose pump for moving clean, compatible liquids in commercial, industrial and agricultural settings. Common applications include:
• Booster service: Raising water pressure in buildings and process systems
• Water circulation and recirculation: Including HVAC and cooling loops
• Water supply: Delivering water for commercial and industrial facilities
• Irrigation: Supplying water for agricultural and turf irrigation systems
• Spraying systems: Feeding spray nozzles for agricultural and industrial use
• Liquid transfer: Moving liquids between tanks, processes and locations
To choose the right model, check your required flow, head, liquid properties and installation conditions against the pump’s performance curves and specifications. Not sure which size fits? Our team can help you select the right pump.
Assembled and Tested in Oakville
Service Filtration assembles and tests 3656 units in-house at our Oakville, Ontario facility before they ship. Each pump arrives configured and ready for your specified duty, helping you cut lead times and get back up and running faster.
FAQs
What is the difference between the 3656 S, M and L-Groups?
The S, M and L-Groups cover different size and performance ranges. The S-Group is the compact range, with capacities up to 550 GPM and heads up to 280 ft, mostly NPT threaded connections, and a choice of all-iron, bronze-fitted or all-bronze construction. The M-Group covers mid-range duties with mostly flanged connections. The L-Group covers the largest sizes (4 x 6-16, 6 x 8-13 and 8 x 10-13), is bronze-fitted only, and reaches up to 4,500 GPM. Share your duty point with us and we'll recommend the right model.
What seal does the Goulds 3656 use?
The 3656 comes standard with a Type 21 mechanical seal with carbon/ceramic faces and BUNA elastomers. Alternative faces (such as silicon carbide) and elastomers (EPR or Viton) are available, and a packed stuffing box option is also offered.
Request a Goulds Pump Quote Today
Fill out the form below with your model number and duty point, and we'll get back to you with pricing, availability and lead times. Prefer to talk? Call us at 1-800-565-5278.
