Pentair IntelliChem 4-Gallon Acid Container (Tank Only, No Pump) | 521378
The Pentair 521378 is a replacement 4-gallon acid feed container designed for use with Pentair IntelliChem chemical automation systems and other compatible chemical feed setups that draw from an external tank. This is the tank-only version (no pump included), intended for installations that use a separate external chemical feed pump to inject acid into the plumbing for automated pH control.
Key Features
- 4-gallon capacity container for acid feed applications (typically muriatic acid, system dependent).
- Tank only (no pump): for systems using a separate external peristaltic pump or chemical feed pump.
- Designed for IntelliChem: common replacement acid container for IntelliChem installations.
- Includes hookup components such as tubing and installation adapters (as supplied with the container kit).
- Durable construction for equipment-pad chemical storage and metering applications.
Compatibility
- Primary use: Pentair IntelliChem chemical controller systems that specify part 521378 for the acid container.
- Also usable with: many third-party chemical feed pumps that accept a 4-gallon external tank (verify your pickup tubing/fittings).
- Important: This container does not include a dosing pump. If you need a tank with a tank-mounted pump, choose the pump-mounted container assembly instead.
What’s Included
- (1) 4-gallon acid container
- Connection tubing and adapters (as packaged)
Common Reasons to Replace
- Cracked container, leaking fittings, or damaged lid/seal
- UV/sun damage that makes the tank brittle
- Odor/fume leakage due to a compromised cap or fitting area
- Replacing worn chemical storage components during an IntelliChem rebuild
Installation Notes
- Install on a stable, level surface in a well-ventilated area and secure the container to prevent tipping.
- Route suction tubing to your external pump with smooth bends and avoid kinks/pinch points.
- Use a proper injection check valve at the injection point to reduce backflow and improve dosing consistency.
- Always follow chemical handling guidance, use appropriate PPE, and comply with local code requirements.
- Chemical automation installation/service is best performed by a qualified pool professional.
Related Products
- Search Aqua Pool Supply for 521378
- IntelliChem Acid Tank with Tank-Mounted Pump (522472)
- IntelliChem Chlorine Tank (Tank Only) (521397)
- IntelliChem Chlorine Tank with Tank-Mounted Pump (522473)
- Chemical Injection Check Valve (522513Z)
- 1/4″ Chemical Feed Tubing
- Pentair IntelliChem Parts
Maintenance Tips
- Keep the container area ventilated and away from metal equipment—acid fumes can accelerate corrosion.
- Inspect tubing and fittings periodically for brittleness and leaks; replace at the first sign of cracking.
- Check suction-line connections for air leaks (air leaks can cause inconsistent feed).
- Store and handle acid safely and follow all chemical manufacturer instructions.
