28 Gallon Custom Roto-Mold RV Holding Tank (MPN: H-558)

Description

The Custom Roto-Mold 28 Gallon RV Holding Tank (Part# H-558) is designed to provide dependable, compact waste or water storage for a variety of RV and mobile applications. Its narrow profile makes it perfect for installations where space is limited or access is tight.

Constructed using rotational molding technology, this tank features a one-piece, seamless design that ensures maximum strength and resistance to cracks, leaks, and corrosion. It’s made from FDA-compliant polyethylene resin (21 CFR 177.1520 (1) 3.1 and 3.2), ensuring safe containment of potable water, greywater, or blackwater.

Whether you’re outfitting a new build or replacing an existing tank, the H-558 offers versatile, reliable performance in a lightweight design.

Key Features

• 28-Gallon Capacity: Ideal for smaller RVs, campers, and portable setups.
• Rotationally Molded Design: Seamless one-piece build eliminates weak points and reduces risk of leaks.
• FDA-Compliant Resin: Built from safe, food-grade polyethylene for use with drinking water or waste systems.
• Low-Profile Configuration: Just under 10" tall—perfect for tight compartments and underfloor installations.
• Rugged Polyethylene Construction: Withstands vibration, road impact, UV rays, and chemical exposure.
• Blank Tank Setup: Ships without fittings, giving you flexibility for custom installations.
• Lightweight Design: Weighs just 14 lbs, making it easy to transport, handle, and mount.
• Made in the USA: Manufactured with strict quality standards for long-lasting use.
  

Specifications

• Product Type: RV Holding Tank
• Part Number: H-558
• Capacity: 28 Gallons
• Dimensions: 55" L x 13.625" W x 9.875" H
• Weight: 14 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.