18 Gallon Custom Roto-Mold RV Holding Tank (MPN: H-640)

Description

The Custom Roto-Mold 18 Gallon RV Holding Tank (Part# H-640) is engineered to meet the requirements of compact mobile holding storage applications, including RVs, trailers, sprinter vans, food trucks, and off-grid setups. Its low-profile design and narrow footprint make it ideal for tight installation spaces where height is a constraint.

Constructed through rotational molding technology, the tank features a seamless, one-piece build that ensures long-term performance and protection from leaks, cracks, or ruptures. Made from FDA-approved polyethylene resin, the tank complies with FDA Regulation 21 CFR 177.1520 (1) 3.1 and 3.2, ensuring safe containment of potable water, greywater, or blackwater.

The Tank Superstore’s knowledgeable team is ready to assist with product selection and application-specific support.

Key Features

• 18-Gallon Capacity: Ideal for small mobile units requiring compact water or waste storage.
• Rotationally Molded Construction: Seamless, one-piece design ensures durability and leak prevention.
• FDA-Compliant Polyethylene: Safe for potable water, greywater, or blackwater applications.
• Ultra Low-Profile Design: At only 6" tall, it fits into extremely tight vertical spaces.
• Built to Last: UV-resistant and able to withstand impact, vibration, and chemical exposure.
• Blank Tank Configuration: Ships without fittings; customize plumbing as needed.
• Lightweight & Durable: Weighs just 13 lbs, making it easy to handle and install.
• Made in the USA: Manufactured in Oregon under strict quality assurance protocols.
  

Specifications

• Product Type: RV Holding Tank
• Part Number: H-640
• Capacity: 18 Gallons
• Dimensions: 46" L x 22" W x 6" H
• Weight: 13 lbs
• Material: FDA-Compliant Polyethylene
• Wall Thickness: Approx. 0.25"
• Color: Natural (Translucent White)
• Fittings: Blank (No pre-installed fittings)
• Manufacturing Location: Oregon, USA
• Application: Potable Water, Greywater, or Blackwater
  

Shipping & Warranty

Shipping Information

• Manufacture Lead Time: 4-5 Week Lead Time 
  
• 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

Warranty coverage varies by manufacturer and product type. For warranty details or to initiate a warranty claim, please contact Tank Supply Direct at info@tanksupplydirect.com.

Price Match Guarantee

If you find the 18 Gallon Custom Roto-Mold Holding Tank (H-640) available at a lower price from an authorized competitor within 6 months, we’ll match the price and refund the difference.

Contact: info@tanksupplydirect.com