Pentair IntellipH PH Controller, 4-gallon Tank | 521377

Product Overview The Pentair IntellipH pH Controller with 4-Gallon Acid Tank is a convenient automatic acid dispensing system designed to help reduce pH fluctuations in residential pool water. Built as a companion system for Pentair IntelliChlor salt chlorine generators and compatible Pentair automation setups, the IntellipH helps maintain more consistent water balance by dispensing muriatic acid into the pool on a programmed schedule. With its large 4-gallon acid reservoir, secure equipment-pad mounting, and easy-to-adjust dispensing control, this system helps reduce hands-on chemical handling while supporting cleaner, more comfortable, and more balanced pool water. Ideal For Residential pool owners who want a safer, more convenient way to manage pH levels. Pools using a Pentair IntelliChlor Salt Chlorine Generator. Pool systems with compatible Pentair automation, such as IntelliTouch or EasyTouch setups with IntelliChlor support. Customers who want to reduce manual acid dosing and help keep water chemistry more stable. Key Features Automatic Acid Dispensing The IntellipH automatically dispenses muriatic acid into the pool to help reduce pH swings and support balanced water chemistry. Large 4-Gallon Reservoir The built-in 4-gallon acid tank provides a larger supply capacity, helping reduce how often the container needs to be refilled. Adjustable Dispense Rate Acid feed settings can be adjusted with the touch of a button, giving pool owners control over how much acid is dispensed based on their pool’s needs. Designed for IntelliChlor Systems The IntellipH is designed to work alongside Pentair IntelliChlor salt chlorine generators, helping support both sanitation and pH balance. Secure Equipment Pad Installation The tank bolts securely to the equipment pad, helping reduce the risk of poolside acid spills and keeping the system safely positioned near the pool equipment. Helps Protect Pool Equipment By helping control pH swings, the IntellipH can support better water balance and help reduce the risk of corrosion caused by improper pH levels. UL and cUL Listed The unit is UL and cUL listed, providing added confidence for properly installed residential pool applications. Benefits Helps maintain more consistent pool pH levels. Reduces the need for frequent manual acid dosing. Helps improve sanitizer effectiveness by supporting balanced water chemistry. Provides a safer, more controlled way to store and dispense muriatic acid. Pairs well with Pentair IntelliChlor salt systems. Helps protect pool surfaces and equipment from the effects of pH imbalance. Large 4-gallon tank capacity reduces refill frequency. Specifications Specification Details Manufacturer Pentair Product Name IntellipH pH Controller with Acid Tank Model / Part Number 521377 SKU 521377 UPC / Barcode Not confirmed — third-party sources show conflicting UPC data; verify against packaging or supplier feed before publishing Tank Capacity 4 gallons Product Type Automatic pH chemical controller / acid dispenser Chemical Dispensed Muriatic acid Compatible Systems Designed for use with Pentair IntelliChlor Salt Chlorine Generator systems and compatible Pentair automation setups Installation Type Equipment pad mounted Controls Adjustable acid dispensing rate Listings / Approvals UL and cUL listed Warranty Pentair lists a 1-year limited warranty on electronics and metering pump Application Residential swimming pools Customer-Facing Q&A Does this system automatically control pool pH? The IntellipH automatically dispenses muriatic acid to help reduce pH fluctuations. It should still be used with regular water testing and proper setup to ensure the dispense amount matches the pool’s needs. Does the Pentair IntellipH include the acid tank? Yes. Model 521377 includes the IntellipH controller with a 4-gallon acid container. Is this compatible with IntelliChlor? Yes. The IntellipH is designed as a companion product for Pentair IntelliChlor Salt Chlorine Generator systems. Can this be installed as a standalone pH controller? This system is intended for use with compatible Pentair equipment, especially IntelliChlor systems and supported Pentair automation. Installation should be verified against the current Pentair installation manual and system configuration. What chemical does it dispense? The IntellipH is designed to dispense muriatic acid for pH reduction. Why is controlling pH important? Balanced pH helps improve swimmer comfort, supports sanitizer performance, and helps protect pool equipment and surfaces from issues caused by improper water balance.