5503-TOICO-B586 Diaphragm Pump

Series 550 High-Performance Water Pump

The 5503-TOICO-B586 diaphragm pump is a dependable, high-efficiency solution engineered for consistent fluid delivery in portable sanitation, water systems, and industrial applications. Built on the proven Series 550 platform, this pump delivers strong flow rates, reliable pressure performance, and long operational life—even in demanding environments.

Designed with a 5-chamber diaphragm system, this pump provides smooth, steady flow while maintaining the ability to self-prime and run dry without damage. Its rugged construction and thermally protected motor ensure safe, reliable operation with minimal maintenance.

Key Features

• High Output Performance – Up to 3.50 GPM open flow
• Consistent Pressure Delivery – Up to 70 PSI shut-off capability
• Self-Priming Design – Up to 11.5 ft vertical lift
• Dry-Run Capable – Protects against damage during intermittent supply
• Thermally Protected Motor – Extends pump life and enhances safety
• NSF Certified Materials – Safe for potable water applications
• Compact & Durable – Built for long-term field use

Performance Specifications

• Model: 5503-TOICO-B586
• Open Flow: Up to 3.50 GPM
• Flow @ 50 PSI: Up to 1.90 GPM
• Max Pressure: Up to 70 PSI (configuration dependent)
• Max Liquid Temperature: 140°F (60°C)
• Max Inlet Pressure: 60 PSI

Motor & Electrical

• Voltage: 115 VAC, 60 Hz
• Motor Type: Permanent magnet, totally enclosed (non-ventilated)
• Thermal Protection: Auto shut-off at ~145°F (63°C)
• Leads: 14 AWG, 12" length

Construction & Materials

Built for durability and chemical resistance in real-world conditions:

• Housing: Polypropylene
• Valves: EPDM
• Diaphragm: Santoprene
• Hardware: Stainless steel

Priming & Operation

• Self-Priming Capability: Up to 11.5 ft (model dependent)
• Continuous Duty: Supported within operating range
• Thermal Cycling Protection: Prevents overheating during extended use

Ports & Connections

• Port Options: Quick Disconnect or 1/2" NPT (Female)
• Hose Sizes: 1/2", 5/8", 3/4"
• Configurations: Straight or elbow fittings available

Physical Details

• Weight: Approximately 6 lbs
• Compact footprint for easy system integration

Ideal Applications

• Portable sanitation systems 
• Water transfer and delivery systems
• Filtration and purification setups
• Beverage and potable water dispensing

Does not include fittings.