Contractor Pricing Available | Contact Our Team at sales@bypassfeeder.com
for Exclusive Reseller Discounts
Need Help Choosing the Right Feeder?
Speak with Our Technical Experts at (623) 624-5662 Today

ATTENTION CONTRACTORS: contact sales@bypassfeeder.com for additional resale discounts



Neptune G-50-1-LP 50 Gallon Glycol Feeder

Sale price $4,900.50 Regular price $5,940.00

REQUEST A QUOTE

Product Overview

The Neptune G-50-1-LP 50 Gallon Glycol Feeder is a dependable solution for maintaining proper fluid levels and system pressure in closed-loop HVAC, hydronic heating, chilled water, and industrial process systems. Featuring a durable 50-gallon reservoir, integrated pump assembly, and automatic make-up capabilities, this unit helps ensure continuous system performance while reducing maintenance requirements. Designed for demanding commercial and industrial environments, this glycol feeder tank provides reliable fluid replenishment to help protect equipment from pressure loss, air infiltration, corrosion, and operational downtime.

Why Choose the Neptune G-50-1-LP?

Maintaining consistent fluid volume and operating pressure is critical for the efficiency and longevity of closed-loop systems. The Neptune G-50-1-LP automatically delivers glycol solution or make-up water when required, helping operators maintain optimal system conditions without constant monitoring.

Key Benefits

✔ Automatically maintains system pressure

✔ Helps prevent air intrusion into closed-loop systems

✔ Reduces corrosion and equipment wear

✔ Supports glycol treatment programs

✔ Minimizes manual maintenance

✔ Durable industrial-grade construction

✔ Large-capacity 50-gallon reservoir

✔ Ideal for commercial and industrial applications

Key Features

50-Gallon Reservoir Capacity

The large-capacity tank provides ample storage for glycol solutions and make-up water, reducing refill frequency and supporting long-term system operation.

Automatic Fluid Replenishment

The integrated pump assembly automatically supplies fluid when pressure drops occur, helping maintain stable operating conditions throughout the system.

Low Maintenance Design

Engineered for reliability, the Neptune G-50-1-LP requires minimal maintenance while delivering dependable performance in demanding environments.

Commercial and Industrial Performance

Designed specifically for HVAC and industrial process applications, this feeder helps facilities maintain proper system pressure and fluid volume with minimal operator intervention.

Equipment Protection

By maintaining proper fluid levels, the system helps reduce the risks associated with air infiltration, pump cavitation, and inefficient heat transfer.

Common Applications

The Neptune G-50-1-LP is commonly installed in:

HVAC Systems

  • Chilled water systems
  • Hydronic heating systems
  • Closed-loop heating applications
  • Heat pump systems

Commercial Buildings

  • Office buildings
  • Hospitals
  • Educational facilities
  • Hotels and resorts

Industrial Applications

  • Manufacturing facilities
  • Process cooling systems
  • Industrial temperature control systems

Institutional Facilities

  • Universities
  • Government buildings
  • Healthcare facilities
  • Commercial campuses

Technical Specifications

Specification Details
Model G-50-1-LP
Manufacturer Neptune
Tank Capacity 50 Gallons
Application Closed-Loop Systems
Fluid Compatibility Glycol Solutions & Water
Operation Automatic Feed System
Installation Commercial & Industrial Applications
Reservoir Construction Heavy-Duty Polyethylene

Compare Neptune Glycol Feeders

Feature G-15 Series G-30 Series G-50-1-LP
Tank Capacity 15 Gallons 30 Gallons 50 Gallons
Automatic Feed Operation Yes Yes Yes
Glycol Compatibility Yes Yes Yes
Commercial HVAC Applications Yes Yes Yes
Industrial Applications Limited Moderate Extensive
Maintenance Requirements Low Low Low
Recommended Facility Size Small Medium Large

Which Model Is Right for Your System?

System Size Recommended Model
Small Closed-Loop Systems G-15 Series
Medium Commercial Facilities G-30 Series
Large Commercial Buildings G-50-1-LP
Industrial Process Systems G-50-1-LP


The G-50-1-LP is often selected for larger facilities that require increased fluid capacity and dependable automatic pressure maintenance.

How a Glycol Feeder Works

A glycol feeder automatically supplies make-up fluid to a closed-loop system whenever pressure falls below the desired operating range. This helps maintain proper fluid volume, improve efficiency, and reduce the likelihood of equipment damage caused by air entering the system.

By maintaining stable operating conditions, glycol feeders play an important role in protecting pumps, heat exchangers, piping networks, and other critical system components.

Ideal For

This feeder is frequently selected by:

  • Mechanical contractors
  • HVAC professionals
  • Facility managers
  • Building engineers
  • Industrial maintenance departments
  • Water treatment specialists

Performance Advantages

The Neptune G-50-1-LP helps operators maintain reliable system performance while reducing the labor associated with manual fluid replenishment. The large-capacity reservoir is particularly beneficial for facilities where maintaining continuous operation is essential.

Its automatic functionality helps ensure proper pressure levels throughout the system, improving equipment protection and reducing the risk of operational disruptions.

Need Help Selecting the Right Glycol Feeder?

Not sure if the Neptune G-50-1-LP is the best fit for your application?

Our specialists can help you:

  • Select the correct feeder size
  • Determine fluid capacity requirements
  • Recommend compatible accessories
  • Provide volume pricing
  • Answer installation questions

👉 Request a Quote Today

Or call (623) 624-5662 to speak with a product specialist.

Frequently Asked Questions

1. What is the purpose of the Neptune G-50-1-LP?

The Neptune G-50-1-LP automatically maintains fluid levels and pressure in closed-loop systems by supplying glycol solution or make-up water when needed.

2. Can this feeder be used in chilled water systems?

Yes. The unit is commonly used in chilled water systems, hydronic heating systems, and industrial process cooling applications.

3. What size facility is this model best suited for?

The 50-gallon capacity makes it ideal for larger commercial buildings, institutional facilities, and industrial applications.

4. Does the feeder require constant monitoring?

No. The automatic operation significantly reduces manual monitoring requirements while helping maintain proper system conditions.

5. Why is maintaining proper pressure important?

Proper system pressure helps prevent air infiltration, corrosion, pump damage, and efficiency losses that can negatively impact equipment performance.

Download Resources:

Click here to view the data sheet.

Click here to view manual.

Actual product may differ from what is shown.