21 Gallon Custom Roto-Mold RV Holding Tank (MPN: H-551)

Description

The Custom Roto-Mold 21 Gallon RV Holding Tank (Part# H-551) is designed to meet the performance demands of mobile liquid storage systems, making it ideal for use in RVs, trailers, campers, and mobile sanitation setups.

Built with a seamless, rotationally molded body, this tank offers outstanding durability and resistance to cracks, leaks, and structural fatigue—even in rugged environments. Manufactured from FDA-approved polyethylene resin, it meets FDA regulation 21 CFR 177.1520 (1) 3.1 and 3.2, making it a safe and reliable solution for both potable water and wastewater applications.

Whether you’re outfitting a new rig or upgrading an older system, this 21-gallon tank delivers lasting performance and installation flexibility.

Key Features

• 21-Gallon Capacity: Ideal for compact RVs, campers, and specialty trailers.
• Seamless Rotational Mold Design: Prevents leaks and withstands heavy use on the road.
• FDA-Compliant Polyethylene: Certified safe for freshwater, greywater, or blackwater.
• Compact Footprint: Space-efficient build allows installation in tight or low-clearance areas.
• Blank Tank Configuration: Ships without fittings, giving you full control over port placement.
• Lightweight & Strong: Weighs only 10 lbs, ensuring easy handling during installation.
• Made in the USA: Manufactured to rigorous quality standards using durable materials.
  

Specifications

• Product Type: RV Holding Tank
• Part Number: H-551
• Capacity: 21 Gallons
• Dimensions: 32" L x 17" W x 10.75" H
• Weight: 10 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

Ships FOB from Idaho (Zip Code: 83605), Freight Class 250. Liftgate delivery is available upon request for residential and limited-access locations.

Covered by a 1-Year Limited Warranty against defects in materials and workmanship under standard use conditions.

Price Match Guarantee

If you find the 21 Gallon Custom Roto-Mold Holding Tank (H-551) listed at a lower price from an authorized retailer within 6 months, we’ll match that price and refund the difference.

Contact: info@tanksupplydepot.com