Planning a reliable holding tank setup for RV trips or temporary waste storage requires evaluating capacity, material, mounting options, and compatibility with your needs. The following 30-gallon holding tanks and accessories represent a range of designs—from under-mounter solutions to portable tote tanks—so you can compare durability, installation flexibility, and usage scenarios before purchasing.
| Product | Brand | Key Benefit | Approx. Fit |
|---|---|---|---|
| RecPro RV Holding Tank | RecPro | 30-gallon capacity; USA-made; rotomolded for strength | Fresh/Gray or Black Water |
| Under Mount 30 Gallon RV Concession Tank UM-3000 | Class A Customs | Under-mount design; NSF materials; flexible dimensions | Fresh or Gray Water |
| Combo Pack 30G & 40G Tanks | classAcustoms | Two tanks in one package; NSF materials; non-pressurized | Fresh or Gray Water |
| Under Mount 30 Gallon RV Concession UM-3000 | Class A Customs | Under-mount; versatile sizing; durable fittings | Fresh or Gray Water |
| Venustank 30 Gallon RV Portable Waste Tank (4 Wheel) | Venustank | Includes kit and wheels; easy transport and cleaning | Waste Tote |
Note: The listed products vary in design and intended use. Please verify mounting type (under-mount vs. portable tote) and compatibility with your RV’s plumbing fittings before purchasing.
RecPro RV Holding Tank (30 Gallon)
Features: Large 30-gallon capacity reduces the frequency of emptying. Made in the USA by Ameri-Kart Inc, supporting American manufacturing. Constructed from durable high-density polyethylene and rotomolded for added strength and reliability. Suitable for black water applications and general RV waste storage.
Class A Customs UM-3000 Under Mount 30 Gallon Tank
Features: 30-gallon tank designed for under-mount installation. NSF-approved materials ensure safety for fresh and drinking water storage. Tank dimensions are 48″ long (approx.) with a thickness around 7/32″ and built-in fittings including two 1.5″ female NPT and two .5″ female NPT fittings. Tanks can sit on various orientations and are designed to be rotated to adjust height or width.
classAcustoms Combo Pack (30G & 40G)
Features: Includes one 30-gallon and one 40-gallon tank; NSF-approved materials; suitable for fresh or gray water storage. Non-pressurized design requires venting and gravity-based filling; built-in fittings include two 1.5″ female NPT and two .5″ female NPT fittings. Tanks can be oriented on different sides.
Class A Customs UM-3000 Under Mount 30 Gallon RV Concession Tank
Features: 30-gallon fresh or gray water holding tank designed for under-mount installation. NSF-approved materials, built-in fittings (two 1.5″ female NPT and two .5″ female NPT), and dimensions allowing rotation to change height/width. Orientation flexibility is emphasized for installation versatility.
Venustank 30 Gallon RV Portable Waste Tank (4 Wheel)
Features: Ready-to-use tote kit with 39 gallons capacity and accessories for moving waste from RVs to dumps. Four steerable front wheels facilitate maneuvering and distribute weight. Large back wheels provide stability, with a 24-inch tow bar for rolling or towing. Interior is designed for easy cleaning with tank rinser; includes a ladder hook for secure storage.
classAcustoms T-3000-SP 30 Gallon Spouted Tank
Features: 30-gallon fresh or gray water holding tank with a spouted (boss) fitting and multiple standard fittings. Made from NSF-approved materials for safety in drinking water applications. Tank measurements allow various orientations; built-in fittings include one 1.25″ outer diameter spout and multiple 0.5″ NPT fittings for flexible connections. Spout option provides a convenient pour mechanism.
Buying Guide: Key Purchase Considerations
- Intended use: Determine if you need a stationary under-mount tank for an RV retrofit, or a portable tote tank for frequent travel and easy emptying.
- Capacity and space: A 30-gallon tank balances storage with weight. Measure your space to ensure proper fit and clearance for hoses and fittings.
- Material and construction: Look for rotomolded high-density polyethylene or NSF-approved plastics for durability and safety. Check thickness but be mindful of manufacturing tolerances.
- Fittings and compatibility: Verify built-in fittings (1.5″ NPT is common) and ensure they match your existing hoses and valves. Some models include extra spouts or balloon-style connections.
- Ventilation and non-pressurized design: Non-pressurized tanks require venting to prevent pressure buildup; do not connect directly to pressurized water sources.
- Mounting options: Under-mount tanks save space but require proper installation clearance. Portable tote tanks offer mobility but add weight when filled.
- Maintenance and cleaning: Consider tanks with easy-access gates, rinsing features, and smooth interiors to simplify cleaning and reduce odor buildup.
- Warranty and origin: Some tanks are proudly made in the USA; consider warranty terms for long-term reliability in road conditions.
- Usage safety: Do not use tanks with drinking-water claims for non-potable waste without confirming NSF approvals for intended use.
When selecting a 30-gallon holding tank, align your choice with vehicle layout, maintenance capability, and how often you travel. The options above provide a spectrum of mounting styles, transport features, and material specifications to support an objective, durable setup for RV waste storage.