Amtrol 4PRO4SWT In-line Steel Well Tank 4.4 Gallons

Product Description

The AMTROL 4PRO4SWT is a pre-pressurized in-line well tank designed for residential potable water systems. Rated at 125 psi working pressure, it uses a heavy-duty diaphragm and a polypropylene liner to separate system water from the air charge, maintaining consistent pressure without waterlogging. A stainless steel system connection made from 304L material resists corrosion in aggressive water conditions. The welded deep-drawn steel shell provides structural rigidity that head-and-shell designs cannot match. A licensed plumber typically installs this tank as part of a well pump pressure system. The 4.4-gallon capacity suits residential well applications where space is limited and inline mounting is preferred.

This tank is suited for residential well water pressure systems where an inline configuration is required. The patented Fresh Water Turbulator agitates incoming water to reduce stagnation inside the vessel, a meaningful advantage in low-usage or seasonal applications. A projection-welded air stem eliminates potential leak paths to preserve the factory precharge. The welded steel base keeps the tank stable without the wobble associated with plastic stands or clamp-on metal designs. Lead-free construction with no brass parts or lead-bearing components makes it suitable for potable water installations subject to lead-free compliance requirements.

Key Features

• 125 psi working pressure rating for standard residential well systems
• 304L stainless steel system connection for corrosion resistance in aggressive water
• Polypropylene liner meets NSF International Standard 61 with no sprayed-on coatings
• Patented Fresh Water Turbulator reduces stagnation by agitating incoming water
• Projection-welded air stem eliminates gaskets and threaded fittings at the air valve
• Lead-free construction with no brass parts or lead-bearing components
• Welded steel base resists rotation and wobble during operation

Compatibility

Designed as an OEM-style pre-pressurized diaphragm well tank for residential potable water pressure systems requiring an inline steel tank configuration.

Installation Notes

Installation should be performed by a licensed plumber in accordance with applicable local plumbing codes and IPC guidelines. Shut off the well pump and relieve all system pressure before disconnecting any existing tank or fittings. Verify the factory precharge pressure matches the system cut-in pressure before placing the tank in service. Do not exceed the 125 psi working pressure rating under any operating condition.

Technical Specifications

• Working Pressure: 125 psi
• Tank Capacity: 4.4 gallons
• Shell Material: Deep-drawn welded steel
• System Connection Material: 304L stainless steel
• Liner Material: Polypropylene
• Diaphragm: Heavy-duty pro-grade material
• Base: Welded steel
• Lead-Free Construction: Yes, no brass or lead-bearing components
• NSF Certification: NSF International Standard 61 (liner)
• Warranty: 5-year limited

Standard Information

• Brand: AMTROL
• Manufacturer Part Number: 4PRO4SWT