KolerFlo H15GR-15

KolerFlo H15GR-15 120W Automatic Water Pressure Booster Pump User Manual

Model: H15GR-15

1. Product Overview

The KolerFlo H15GR-15 is a 120W automatic water pressure booster pump designed to enhance water pressure in various household applications. It is suitable for duplex apartments, suburban villas, and systems requiring increased water pressure for water heaters, general household use, and solar water heating systems. This pump helps prevent issues like insufficient water pressure leading to cold water supply.

Key Features:

  • Automatic Operation: Equipped with a water flow switch for automatic start and stop, ensuring steady pressure as needed.
  • Powerful Performance: Features a 120W motor, providing a maximum pressure of 1.5 bar (21.7 PSI) and a maximum flow rate of 396 GPH (25 L/min).
  • High Head Lift: Capable of a maximum head lift of 49.2 feet (15 meters).
  • Durable Construction: Includes high-quality full brass fittings and a pure copper motor for longevity.
  • Easy Installation: Designed for straightforward installation, requiring only a wrench.
  • Energy Efficient: Engineered for energy-saving operation.
  • Quiet Operation: Operates with minimal noise.
  • Wide Temperature Range: Supports liquid temperatures from 0°F to +212°F.
KolerFlo H15GR-15 Booster Pump boosting water flow to a shower and water heater

Image: The KolerFlo H15GR-15 pump installed, demonstrating boosted water flow to a shower and connected to a water heater. Key specifications like max flow, max head, voltage, and current are highlighted.

Multiple applications of the KolerFlo H15GR-15 booster pump

Image: A collage illustrating various applications for the booster pump, including faucet pressurization, water heater pressurization, solar water heating, and shower pressurization.

2. Safety Information

Please read and understand all safety instructions before installing or operating the pump. Failure to follow these instructions may result in electric shock, fire, serious injury, or property damage.

  • Ensure the power supply matches the pump's voltage (115VAC, 60Hz).
  • Always disconnect power before performing any maintenance or installation.
  • Do not operate the pump dry; ensure water is flowing through it to prevent damage.
  • Install the pump in a location protected from freezing temperatures and direct weather exposure.
  • Use appropriate plumbing materials and sealants to prevent leaks.
  • If you are unsure about any installation steps, consult a qualified plumber or electrician.

3. Package Contents

Verify that all items are present and undamaged upon opening the package:

  • KolerFlo H15GR-15 Automatic Water Pressure Booster Pump
  • Water Flow Switch
  • Brass Fittings (1/2" NPT connection size)
  • Power Cord
  • Instruction Manual
Exploded view of KolerFlo H15GR-15 pump showing internal components

Image: An exploded view of the pump, highlighting the 120W pure copper motor, convenient control box, stable base, and automatic water flow switch. This illustrates the quality components included.

4. Specifications

FeatureSpecification
Model NumberH15GR-15
Power120W
Voltage115VAC
Frequency60 Hz
Max Pressure1.5 bar (21.7 PSI)
Max Flow Rate396 GPH (25 L/min)
Max Head Lift49.2 ft (15 m)
Connection Size1/2" NPT
Liquid Temperature Range0°F to +212°F
MaterialBrass (fittings)
Product Dimensions (L x W x H)6.9" x 3.94" x 3.6"
Dimensional drawing of the KolerFlo H15GR-15 booster pump and its components

Image: A detailed diagram showing the dimensions of the KolerFlo H15GR-15 booster pump, including its main body, inlet/outlet, and flow switch, with measurements in inches.

5. Setup & Installation

The KolerFlo H15GR-15 pump is designed for easy installation. Follow these steps carefully to ensure proper setup and operation.

Pre-Installation Checklist:

  • Ensure the installation area is dry, well-ventilated, and protected from freezing.
  • Verify that the existing plumbing is compatible with 1/2" NPT connections.
  • Gather necessary tools: wrench, Teflon tape, and any additional adapters if required for your specific plumbing.
  • Turn off the main water supply to the installation area.
  • Drain any water from the pipes where the pump will be installed.

Installation Steps:

  1. Prepare Connections: Apply Teflon tape to the threads of the pump's inlet and outlet.
  2. Connect Inlet: Screw the appropriate adapter onto the pump's inlet. Connect the water inlet pipe to this adapter and tighten the joint securely with a wrench.
  3. Connect Outlet: Screw the flow switch onto the pump's outlet, ensuring a gasket is in place. Connect the water outlet pipe (e.g., to the water heater) to the flow switch and tighten.
  4. Mount the Pump: Secure the pump's base to a stable surface using appropriate fasteners. Ensure it is level and stable.
  5. Connect Power: Plug the power cord into the control box, then plug the control box into a standard 115VAC electrical outlet.
  6. Restore Water Supply: Slowly turn on the main water supply and check for any leaks.
  7. Prime the Pump (if necessary): If the pump does not start automatically or if air is trapped, open a faucet to allow water to flow through the system and release air.
Installation diagram for KolerFlo H15GR-15 booster pump with gas water heater and main water pipe

Image: A diagram illustrating two common installation scenarios: one for a gas water heater setup with hot and cold water lines, and another for installation on the main water pipe after the water meter to pressurize the entire house.

Step-by-step visual guide for installing the KolerFlo H15GR-15 booster pump

Image: A six-step visual guide demonstrating the installation process, including applying Teflon tape, connecting inlet/outlet, plugging in the control box, connecting to water lines, and fixing the pump base.

6. Operating Instructions

The KolerFlo H15GR-15 booster pump features an automatic water flow switch for convenient operation.

Automatic Operation:

  • Once installed and powered, the pump will automatically detect water flow.
  • When a faucet or water outlet is opened, the pump will activate to boost water pressure.
  • When the faucet or water outlet is closed, the pump will automatically shut off.
  • Ensure the flow switch is set to the 'AUTO' position for automatic functionality.

Manual Override:

  • The control box includes a switch for 'AUTO' and 'MOVE' (manual) modes.
  • In 'MOVE' mode, the pump will run continuously, regardless of water flow. Use this mode only when necessary for specific tasks and monitor the pump to prevent dry running or overheating.
  • Always return the switch to 'AUTO' for normal household use.
Close-up of the automatic start-stop switch and faucet operation

Image: A close-up view of the double-control automatic start-stop switch and a faucet, illustrating how the pump automatically starts when water flows and stops when the water is turned off.

7. Maintenance

Regular maintenance ensures the longevity and optimal performance of your booster pump.

Routine Care:

  • Inspect for Leaks: Periodically check all connections for any signs of water leakage. Tighten fittings as needed.
  • Clean Exterior: Keep the pump's exterior clean and free from dust or debris.
  • Check for Unusual Noises: Listen for any abnormal sounds during operation, which could indicate an issue.
  • Winterization: If installed in an area prone to freezing, ensure the pump and connected pipes are drained or adequately insulated to prevent freeze damage.

Cleaning:

  • Use a soft, damp cloth to wipe down the pump's exterior.
  • Do not use harsh chemicals or abrasive cleaners.
  • Ensure no water enters the electrical components during cleaning.

8. Troubleshooting

If you encounter issues with your KolerFlo H15GR-15 pump, refer to the following common problems and solutions:

ProblemPossible CauseSolution
Pump does not startNo power; Flow switch in 'MOVE' mode; Air in pump; Motor seizedCheck power connection; Set switch to 'AUTO'; Prime the pump by opening a faucet; Contact support if motor is seized.
Low water pressure after installationIncorrect installation; Air in system; Clogged filter/strainerReview installation steps; Bleed air from system; Check and clean any inline filters.
Pump runs continuouslySmall leak in system; Flow switch malfunction; Switch set to 'MOVE'Check for leaks in plumbing; Inspect flow switch; Set switch to 'AUTO'.
Excessive noise during operationAir in pump; Loose mounting; VibrationBleed air from system; Ensure pump is securely mounted; Add vibration dampening material if needed.
Water leaks from connectionsLoose fittings; Insufficient Teflon tape; Damaged gasketsTighten all connections; Reapply Teflon tape; Replace damaged gaskets.

9. Warranty & Support

KolerFlo provides the following support for the H15GR-15 Automatic Water Pressure Booster Pump:

  • 30-Day Free Return: If you are not satisfied with your purchase, you may return it within 30 days.
  • 3-Month Fittings Parts Replacement: We offer a 3-month replacement policy for fittings parts.
  • Customer Service: For any problems or inquiries regarding the product, please contact KolerFlo customer service. We are committed to ensuring your satisfaction.

© 2026 KolerFlo. All rights reserved.

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