classAcustoms Class A Customs | 20 Gallon RV Concession Fresh Water Tank with Plumbing Kit & 12 Volt Water Pump | T-2000-BPK-PUMP

Why I chose this 20-gallon tank kit

I needed a compact, drinking-water-safe setup to retrofit a small camper and occasionally support a concession sink. The Class A Customs 20-gallon water tank kit appealed because it bundles a fresh water tank, a basic plumbing kit, and a 12V on-demand pump in one box. The value proposition is straightforward: get the core pieces working quickly without chasing a dozen fittings. After installing and using it over several weekends, here’s how it fared.

What’s in the box (and what isn’t)

The kit includes:
- 20-gallon polyethylene tank made from NSF-approved materials
- Two 1.5-inch female NPT ports and two 0.5-inch female NPT ports built into the tank
- A basic plumbing kit: hose barbs/adapters, clamps, 5 ft of 1.25-inch fill hose, and 5 ft of 0.5-inch hose for vent/draw
- A 12V on-demand diaphragm pump rated 3.0 GPM, 45 PSI shut-off (approx. 4A running, 8A max)

You’ll likely still need:
- A proper fill dish or gravity fill fitting (the tank is non-pressurized; don’t hook a pressurized garden hose directly to it)
- An inline strainer for the pump inlet (highly recommended to protect the pump)
- Additional hose/PEX and a few fittings depending on your layout
- A 10–15A fused 12V circuit and appropriate wire gauge
- An optional accumulator to reduce pump cycling and noise

Installation: quick to functional, with a few caveats

The tank’s footprint (roughly 32.5 x 11.75 x 11.75 inches) is friendly for small builds, and the ability to rotate it on any side helps when shoehorning it under a bench or in a cabinet. The wall thickness (about 7/32-inch) feels sturdy for a non-pressurized design, and there’s enough flat surface to add straps and blocking for support. Remember that a full 20 gallons adds around 166 pounds—plan a base that supports the entire underside and use straps to prevent shifting.

Fittings are straightforward. The two large (1.5-inch) ports come sealed from the factory with a thin plastic membrane; you cut it open with a razor when you’re ready to plumb. One of these makes a great gravity-fill connection; the included 1.25-inch hose and 1.5-inch male adapter get you started, though many builds will still want a proper exterior fill dish. The 0.5-inch ports are typically used for vent and draw to the pump. A few tips that made the install smoother:
- Use plastic male adapters into the tank’s female NPT ports. Metal threads can chew up the plastic.
- Don’t over-tighten. Snug plus a small additional turn is enough. Use a potable-water-safe thread sealant or a light wrap of PTFE tape.
- Venting matters. Run the 0.5-inch vent line high and out to atmosphere (or to a vented fill dish). The tank must breathe in and out.
- Isolate the pump. Rubber feet and a short loop of soft hose on both sides will reduce vibration and drone.

On my unit, I noticed some plastic shavings inside the tank—a byproduct of manufacturing. A thorough rinse and a mild sanitizing cycle took care of it, but I recommend checking and flushing before first use.

From unboxing to water flowing at the faucet, I spent about half a day, including mounting, wiring, and a proper leak check.

Performance and day-to-day use

The included 12V on-demand pump delivers a consistent 3.0 GPM open flow and shuts off around 45 PSI. In practice, that’s ample for a small galley sink and light handwashing. I wouldn’t expect it to run a shower and a faucet simultaneously without noticeable cycling, but for compact RVs or a concession triple-sink with low-flow sprayer, it’s enough.

Noise is typical diaphragm-pump territory: a firm hum that’s noticeable in a quiet cabin but not out of line with other compact pumps. Soft mounts and an accumulator help a lot. Without an accumulator, the pump cycles quickly with low-flow fixtures; adding one smoothed the pressure and made the system feel more “house-like.”

Flow was steady and the pump primed reliably after initial setup. I strongly suggest an inline strainer; it protects the pump from any flakes or scale that wander downstream.

Water quality and safety

The tank material is NSF-approved for fresh and drinking water. After a thorough flush and sanitize, I didn’t observe plastic taste or odor. I sanitize at the start of each season and after long storage. A simple protocol works well:
- Mix a sanitizing solution (roughly 1/3 cup of unscented household bleach for a 20-gallon fill)
- Fill, circulate to the lines, let sit a few hours
- Drain and flush with clean water until the chlorine smell dissipates

If taste is critical, consider a final-stage carbon filter near the faucet.

Design details that matter

A few smart touches stand out:
- The sealed membranes on the large ports keep the tank clean until you’re ready to plumb.
- Two 0.5-inch ports give flexibility—e.g., one for vent, one for pump draw, or add a dedicated drain on a ball valve.
- The squarish footprint with equal height/width makes orientation flexible in tight spaces.

There are limitations to be aware of:
- The included hoses are only 5 feet each. In many builds, the fill run and vent will need more length.
- Because the tank is non-pressurized, you must use gravity fill or a proper fill dish. Connecting a pressurized hose directly to the tank ports is a recipe for damage.
- The kit doesn’t include a strainer, switch, wiring, or an accumulator—items many users will want.

Real-world use cases

• Small campers and van conversions: Ideal as a primary fresh tank with a single sink or compact galley.
• Concession trailers: Works as a fresh-water source feeding a 12V pump to meet handwash and utensil rinse needs (check local codes for total capacity and hot-water requirements).
• Auxiliary capacity: Easy to plumb in parallel as an extra 20 gallons feeding an existing pump system.

What I’d improve

• Include a pump strainer in the kit. It’s inexpensive insurance for the pump.
• Offer longer hose lengths or a second kit size option; 5 feet is limiting for many layouts.
• Add clearer guidance on vent routing and fill practices in the instructions, especially emphasizing that the tank must remain unpressurized.
• Quality control on tank debris could be tighter. Mine needed an extra flush to remove plastic shavings.

Tips for a trouble-free install

• Mount the tank on a flat, supportive surface; don’t rely on the fittings for support.
• Use nylon or polypropylene adapters into the tank, with potable-safe sealant.
• Build in a low-point drain for winterization and maintenance.
• Add an accumulator and soft hose loops to reduce pump cycling and noise.
• Fuse the pump circuit appropriately (10–15A) and use wire sized for the run length and current.

The bottom line

As a compact, NSF-safe fresh water solution with a sensible on-demand pump, this 20-gallon tank kit hits a sweet spot for small RVs, vans, and concessions. It’s easy to install, flexible in orientation, and delivers reliable flow for modest fixtures. You’ll likely augment it with a strainer, a proper fill dish, and perhaps an accumulator—reasonable additions in the DIY water world.

Recommendation: I recommend this tank kit for builders who want a budget-friendly, capable fresh water system without piecing together every component from scratch. It’s particularly well-suited to single-faucet galley setups and compact trailers where 20 gallons is the right capacity. If you need whisper-quiet operation or plan to run multiple fixtures at once, budget for an accumulator and noise isolation—or consider a higher-output pump. For most small builds, though, this kit is a practical, dependable starting point.