<img height="1" width="1" style="display:none;" alt="" src="https://px.ads.linkedin.com/collect/?pid=5375274&amp;fmt=gif">

✓ Assembled On-Site | No Liners Required

Modular FRP Panel Tanks

HISHITANK panel tanks are modular water storage tanks assembled on-site from GRP (glassfiber reinforced plastic) panels joined with bolts, nuts, and gaskets. No liners or internal coating are required. Manufactured by Mitsubishi Chemical Infratec for more than 50 years, they are designed to be configured around the available space, making them a practical choice when a one-piece tank cannot be delivered to or installed within the site or building.

HISHITANK is used across a wide range of applications including potable water, fire protection reserve, industrial process water, rainwater harvesting, and facility support storage, and carries NSF-61, NFPA 22, AWWA D121, and IAPMO/ANSI Z1002-2014 certifications.

NSF-61 / NFPA 22 Certified

Download Spec Sheet

mmodular-frp-tank-800x500-032026

Specs

  • Matches required project capacity (gallons or liters)
  • Complies with available footprint (length x width) and maximum height limit
  • Install location: indoor, outdoor, rooftop, or mechanical room
  • Access constraints: door sizes, elevator or stair access, tight corridors
  • Connection needs: inlet, outlet, overflow, drain, and vent locations
  • Access openings for inspection and maintenance
  • Site conditions: level base or structural support available, staging space for assembly

Features

  • Modular build allows installation through tight doorways, mechanical rooms, basements, and indoor locations where a one-piece tank cannot fit
  • Assembled with bolts, nuts, and gaskets: no liners required
  • GRP does not corrode like steel and requires no internal coating
  • Tank size and footprint can be designed around the available space; options vary by project
  • Insulated panel option available for temperature-sensitive installations
  • A single tank can be configured as two separate chambers using an internal divider

Applications

  • Potable (drinking) water storage in residential buildings, hospitals, hotels, offices, and schools
  • Private fire protection reserve (NFPA 22 listed)
  • Rainwater harvesting and stormwater management (IAPMO/ANSI Z1002-2014 certified)
  • Industrial and commercial water: process water, cooling water for chillers, and wash-down supply
  • Irrigation and agriculture water storage
  • Municipal and utility support: pump stations, water distribution, and treatment facilities
HishiTank in function

Modular FRP Panel Tanks Details

HISHITANK is a modular water storage tank manufactured by Mitsubishi Chemical Infratec (MCIT) for more than 50 years. Panels are made from GRP (glassfiber reinforced plastic) and are joined on-site using bolts, nuts, and gaskets. No liners are required. Panels are also available in stainless steel, and an insulated option using expanded polystyrene is available for temperature-sensitive installations.

Because panels are delivered individually and the tank is assembled in place, HISHITANK can be installed in locations that are not accessible to one-piece tanks, including mechanical rooms, basements, rooftops, and constrained indoor spaces. GRP configurations support a maximum footprint of 4m wide by 4m long with a maximum height of 4m. A single tank can also be divided into two separate chambers using an internal divider for added flexibility.

Basic Install Instructions

Learn More

Verify the shipment and organize panels and hardware near the build area to keep the install sequence smooth.

HishiTank in packaging

Step 1

Receive & stage components
HishiTank getting assembled

Step 2

Prepare the foundation

Verify the pad or base is ready and level before assembly begins to support proper alignment and long-term performance.

Verify the shipment and organize panels and hardware near the build area to keep the install sequence smooth.

Specialist Support for Your Storage Project

Talk with a specialist for practical guidance and equipment recommendations.

1-863-261-8388 Contact a Specialist

Frequently Asked Questions

Common questions about HISHITANK modular FRP panel tanks and what to expect when planning a project.

What is a panel tank?

A panel tank is a water storage tank assembled on-site from individual bolted panels rather than delivered as a single fabricated unit. HISHITANK panel tanks use GRP (glassfiber reinforced plastic) panels joined with bolts, nuts, and gaskets. No liners are required. To get a quote specified to your site or space requirements, reach out to our qualified team for the right storage solution for you.

Can HishiTanks be used for potable water

Yes. HISHITANK is NSF-61 certified for drinking water system components and is used for potable water storage in residential buildings, hospitals, hotels, and offices. Confirm potable water suitability and any applicable local code requirements during the quoting process.

Why choose a modular tank over a one piece?

The primary reason is site access. If a one-piece tank cannot be brought through a building entrance, lifted to a rooftop, or placed in an indoor mechanical room, a modular panel tank is often the practical alternative. Panel tanks are also useful when capacity and footprint need to be designed for a specific constrained space.

What certifications does HishiTanks carry?

HISHITANK carries NSF-61 , AWWA D121, NFPA 22, IAPMO/ANSI Z1002-2014 (rain harvesting tanks), and ICC-ES PMG. Contact us to request documentation for your project submittal package.