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Amtrol (141S351) RO Steel Pressure Tank 4.4 Gallon 1/4" NPT White

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Amtrol (141S351) RO Steel Pressure Tank 4.4 Gallon 1/4" NPT White

The Amtrol 141S351 is a 4.4-gallon steel pressure tank engineered with the company's pioneering diaphragm technology developed over four decades of reverse osmosis innovation. This NSF-listed tank delivers 2.8 gallons of usable storage capacity with a fully enclosed polypropylene and butyl reservoir that ensures water purity without the rubber contact issues common in bladder-style tanks.
SPECIFICATIONS

Amtrol 141S351 Technical Details

Model Number Amtrol 141S351
Total Capacity 4.4 Gallons
Usable Storage Capacity 2.8 Gallons
Connection Size 1/4" NPT
Dimensions 11" Diameter x 15" Height
Construction Steel body with polypropylene/butyl diaphragm
Certifications NSF Listed, ISO Certified
Warranty 5 Years
INSTALLATION & USE

Installing Your Pressure Tank

  1. Mount the tank vertically in a location with adequate clearance for the 11" diameter and 15" height, keeping it accessible for future maintenance.
  2. Connect the 1/4" NPT fitting to your RO system's storage line using thread sealant tape, ensuring a watertight connection without overtightening.
  3. Pre-charge the air side of the tank to 5-7 PSI using the air valve before filling with water to optimize diaphragm performance and water discharge.
  4. Allow the system to fill completely, then check for leaks at all connection points and verify consistent water pressure during draw-down.
COMPATIBILITY

System Requirements

The Amtrol 141S351 works with all standard residential and light commercial reverse osmosis systems equipped with 1/4" tubing connections. The tank's 2.8-gallon usable capacity is ideal for households with moderate to high water consumption, providing sufficient reserve volume to reduce system cycling and extend membrane life. Compatible with both under-sink and utility room installations where steel construction is preferred over composite materials for durability and longevity.

🔧 Check and adjust the air pre-charge every 12-18 months using a standard tire pressure gauge at the Schrader valve. Proper air pressure maintains the diaphragm position and prevents waterlogging, which is the most common cause of reduced capacity in pressure tanks.
The Amtrol 141S351 is a 4.4-gallon steel pressure tank engineered with the company's pioneering diaphragm technology developed over four decades of reverse osmosis innovation. This NSF-listed tank delivers 2.8 gallons of usable storage capacity with a fully enclosed polypropylene and butyl reservoir that ensures water purity without the rubber contact issues common in bladder-style tanks.
SPECIFICATIONS

Amtrol 141S351 Technical Details

Model Number Amtrol 141S351
Total Capacity 4.4 Gallons
Usable Storage Capacity 2.8 Gallons
Connection Size 1/4" NPT
Dimensions 11" Diameter x 15" Height
Construction Steel body with polypropylene/butyl diaphragm
Certifications NSF Listed, ISO Certified
Warranty 5 Years
INSTALLATION & USE

Installing Your Pressure Tank

  1. Mount the tank vertically in a location with adequate clearance for the 11" diameter and 15" height, keeping it accessible for future maintenance.
  2. Connect the 1/4" NPT fitting to your RO system's storage line using thread sealant tape, ensuring a watertight connection without overtightening.
  3. Pre-charge the air side of the tank to 5-7 PSI using the air valve before filling with water to optimize diaphragm performance and water discharge.
  4. Allow the system to fill completely, then check for leaks at all connection points and verify consistent water pressure during draw-down.
COMPATIBILITY

System Requirements

The Amtrol 141S351 works with all standard residential and light commercial reverse osmosis systems equipped with 1/4" tubing connections. The tank's 2.8-gallon usable capacity is ideal for households with moderate to high water consumption, providing sufficient reserve volume to reduce system cycling and extend membrane life. Compatible with both under-sink and utility room installations where steel construction is preferred over composite materials for durability and longevity.

🔧 Check and adjust the air pre-charge every 12-18 months using a standard tire pressure gauge at the Schrader valve. Proper air pressure maintains the diaphragm position and prevents waterlogging, which is the most common cause of reduced capacity in pressure tanks.
$177.99
Amtrol (141S351) RO Steel Pressure Tank 4.4 Gallon 1/4" NPT White—
$177.99

Description

The Amtrol 141S351 is a 4.4-gallon steel pressure tank engineered with the company's pioneering diaphragm technology developed over four decades of reverse osmosis innovation. This NSF-listed tank delivers 2.8 gallons of usable storage capacity with a fully enclosed polypropylene and butyl reservoir that ensures water purity without the rubber contact issues common in bladder-style tanks.
SPECIFICATIONS

Amtrol 141S351 Technical Details

Model Number Amtrol 141S351
Total Capacity 4.4 Gallons
Usable Storage Capacity 2.8 Gallons
Connection Size 1/4" NPT
Dimensions 11" Diameter x 15" Height
Construction Steel body with polypropylene/butyl diaphragm
Certifications NSF Listed, ISO Certified
Warranty 5 Years
INSTALLATION & USE

Installing Your Pressure Tank

  1. Mount the tank vertically in a location with adequate clearance for the 11" diameter and 15" height, keeping it accessible for future maintenance.
  2. Connect the 1/4" NPT fitting to your RO system's storage line using thread sealant tape, ensuring a watertight connection without overtightening.
  3. Pre-charge the air side of the tank to 5-7 PSI using the air valve before filling with water to optimize diaphragm performance and water discharge.
  4. Allow the system to fill completely, then check for leaks at all connection points and verify consistent water pressure during draw-down.
COMPATIBILITY

System Requirements

The Amtrol 141S351 works with all standard residential and light commercial reverse osmosis systems equipped with 1/4" tubing connections. The tank's 2.8-gallon usable capacity is ideal for households with moderate to high water consumption, providing sufficient reserve volume to reduce system cycling and extend membrane life. Compatible with both under-sink and utility room installations where steel construction is preferred over composite materials for durability and longevity.

🔧 Check and adjust the air pre-charge every 12-18 months using a standard tire pressure gauge at the Schrader valve. Proper air pressure maintains the diaphragm position and prevents waterlogging, which is the most common cause of reduced capacity in pressure tanks.