This tank showes an imput hole in the top. How big is it I couldn't find anything in the discription?

The top is a mold mark in the tank. In order to fill the tank you will need to use a hole saw bit and drill a hole into the tank where needed for your unit. Then place a plastic grommet to snug the pipe in, we also sell the grommets in 3" and 1 1/2". Thank you, Class A Customs Elkhart, Indiana

What's the deal with the hose clamp on the outlet pipe

The hose clamp is used for holding the outlet pipe in place in addition to adhesive.

Can this be used as an additional storing tank for waste? I still have the one on my camper but I want to add this one due to not having a septic yet.

I don't see why not..? It's up to you how you use it. But I replaced my tank and works great!

what is the width of the bottom part of the tank? where can I find more details dimensions before ordering it?

Please be sure to view the CAD drawing on this tank, you will need to scroll through the photos to view it.

Class A Customs 40 Gallon Rv Waste Black Water Holding

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Fully operational. Shipping worldwide, on schedule.Duty & taxes paid at delivery

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32196962₫

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Sold byAmazon VietnamDelivered byDesertcartCustomer service byDesertcartReturns14 days · 30 with PRO

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Description

🚐 Own the road with confidence—your ultimate RV waste solution awaits!

LIGHTWEIGHT YET RUGGED - Easy to handle and install, but engineered to withstand the weight and rigors of full use—secure mounting recommended.
INTEGRATED 3 ABS OUTLET - Factory-installed outlet streamlines your plumbing setup—just add your vent and dump valve for a custom fit.
MASSIVE 40 GALLON CAPACITY - Perfectly sized for extended RV trips or tiny house setups—never worry about frequent dumps again.
PREMIUM USA MADE MDPE RESIN - Durable, seamless one-piece construction ensures no leaks or bursts—built tough for the road warriors.
CUSTOMIZABLE INLET VENT PLACEMENT - Design your system your way—tank comes ready for your personalized inlet and vent installation.

The Class A Customs 40 Gallon RV Waste Black Water Holding Tank WT-4000 is a robust, seamless, and lightweight tank made in the USA from high-quality Medium Density Polyethylene resin. Designed exclusively for waste and gray water, it features a fixed 3” ABS female outlet and customizable inlet and vent placements, making it ideal for RVs, campers, trailers, motorhomes, and tiny houses. Its durable construction ensures leak-free performance, while its large capacity supports extended travel or off-grid living. Note: fittings, valves, and mounting hardware are sold separately.

Specifications

ASIN	B07NLLQDC1
Best Sellers Rank	#354,147 in Automotive ( See Top 100 in Automotive ) #34 in RV Black Water Tanks
Brand	classAcustoms
Brand Name	classAcustoms
Capacity	40 Gallons
Color	Black
Customer Reviews	4.4 out of 5 stars 202 Reviews
Item Dimensions L x W x H	56.5"L x 24.5"W x 9"H
Item Weight	0.01 Ounces
Manufacturer	Class A Customs
Manufacturer Part Number	WT-4000
Material	Polyethylene (PE), Polyvinyl Chloride (PVC), Resin
Material Type	Polyethylene (PE), Polyvinyl Chloride (PVC), Resin
Product Dimensions	56.5"L x 24.5"W x 9"H
Shape	Rectangular

Reviews

F**D

6.06.2024

T**T

19.12.2025

A**R

15.09.2020

C**R

30.07.2021

J**Y

7.03.2023

S**E

20.05.2025

G**L

29.04.2024

S**N

18.01.2023

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