31 Gallon Custom Roto-Mold RV Holding Tank (MPN: H-584)

Description

The Custom Roto-Mold 31 Gallon RV Holding Tank (Part# H-584) is engineered to meet the demanding requirements of mobile liquid storage in RVs, campers, trailers, and portable sanitation systems.

Manufactured with seamless rotational molding technology, this tank provides superior strength and durability, preventing cracks, chips, or ruptures under road vibration, thermal expansion, or pressure stress. It is made from FDA-approved polyethylene resin, ensuring compliance with FDA regulation 21 CFR 177.1520 (1) 3.1 and 3.2—making it safe for potable water storage and compatible with grey or black water use.

With its low-profile design and versatile dimensions, the H-584 is an excellent fit for a wide range of mobile applications. Need help with plumbing or system design? The Tank Superstore team is standing by with expert support.

Key Features

• 31-Gallon Capacity: Ideal for mid-size RV builds, custom van conversions, or off-grid restroom setups.
• Rotationally Molded Construction: One-piece, seamless build minimizes risk of leaks and structural weaknesses.
• FDA-Compliant Resin: Built from food-grade polyethylene, approved for drinking water and wastewater use.
• Low-Profile Footprint: Just 8" tall, perfect for under-floor or confined installations.
• Resilient & Rugged: Withstands UV exposure, chemical contact, vibration, and impacts.
• Blank Tank Configuration: Ships with no pre-installed fittings, allowing for custom placement as needed.
• Lightweight & Easy to Handle: Weighs only 18 lbs, simplifying transport and installation.
• Made in the USA: Manufactured with precision and quality materials in the United States.
  

Specifications

• Product Type: RV Holding Tank
• Part Number: H-584
• Capacity: 31 Gallons
• Dimensions: 54" L x 22" W x 8" H
• Weight: 18 lbs
• Material: FDA-Compliant Polyethylene
• Wall Thickness: Approx. 0.25"
• Color: Natural (Translucent White)
• Fittings: Blank (No pre-installed fittings)
• Manufacturing Location: USA
• Application: Fresh, Grey, or Black Water
  

Shipping & Warranty

Shipping Information

• Manufacture Lead Time: 3-5 Weeks 
  
• Ships From (State): ID
  

Products are subject to freight or parcel shipping costs. Shipping charges are calculated at checkout based on delivery location, product size, weight, and carrier requirements.

Each tank is manufactured and assembled in the USA using high-quality materials and strict quality control standards—built for long-term, dependable use in demanding applications.

Warranty Information

Custom Roto-Molding tanks are covered by a 5-year manufacturer warranty from the date of original purchase against defects in material and workmanship. Coverage applies to tanks that are correctly installed and have not been subjected to abuse or misuse, and is for the benefit of the original end user. The warranty does not cover misuse, fire, accident, negligence, transit damage, unauthorized modifications, excessive external pressure, abnormal use, product loss through leakage, or related injury/property damage. Manufacturer liability is limited to repair or, at its option, replacement of a qualifying defective product, subject to written notice within the warranty period and return of the item to the point of manufacture with transportation prepaid. For warranty details or to initiate a warranty claim, please contact Tank Supply Direct at info@tanksupplydirect.com.