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Above ground septic tanks are also referred to as septic holding tanks, job trailer waste tanks, job trailer septic tanks, job shack tanks, waste tanks, trailer waste tanks, camper septic tanks, cottage septic tanks, and motorhome septic tanks. Septic tanks are not FDA-approved to contain or transport potable water, and should not be used for this purpose. Their primary function is to contain human waste, sewage, and black water.

These septic tanks are designed for use in mobile or raised structures such as those found in industrial, construction, and camping sites. The tanks often serve as the sole septic receptacle for recreational vehicles, motor homes, cottages, campers, job trailers, and job shacks. Their flat, rectangular, low-profile shape makes them ideal for sitting beneath these structures. They are commonly used as portable black water tanks.

Above ground septic tanks are manufactured by National Tank Outlet and Ace Roto-Mold. High-density virgin polyethylene resin is rotationally molded to create these plastic waste tanks. Rotational molding produces tanks that are seamless, resistant to impact, and durable. The addition of UV inhibitors during production protects the tank from sun degradation, so it can be kept indoors or outdoors. These plastic sewage tanks are able to withstand a wide range of temperatures and weather conditions. These beneficial attributes promote a long, useful lifespan for the tanks.

Since these septic tanks are made from plastic, they are lightweight. They do not require special equipment to transport, and they can be carried into place by two people. They are also free-standing and self-supporting.

Above ground septic tanks are available in sizes ranging from 250 gallons up to 440 gallons. These holding tanks are designed to accept rubber couplers and clamps with recessed ports to accommodate various plumbing configurations. They are opaque and come in colors of black or gray. There are septic tanks available that come with a lid or pre-installed ports. Additional connections, openings, and lids may be added to the tanks if desired. Every septic tank is also covered by a manufacturer's three-year warranty.
Tank / Capacity Length Width Height Size S.G. Part# From Price
105 Gallon Above Ground Septic Holding Tank
Ships Fast! ~ 48 Hour Lead Time
48" 48" 10.5" 48" L
48" W
10.5" H
No 105GB MS, TX $ 300
225 Gallon Above Ground Septic Holding Tank
Ships Fast! ~ 48 Hour Lead Time
90" 33" 20" 90" L
33" W
20" H
No 225GB MS $ 460
250 Gallon Above Ground Septic Holding Tank
Ships Fast! ~ 48 Hour Lead Time
69" 49" 19.5" 69" L
49" W
19.5" H
1.9 44239 MS, TX $ 590
250 Gallon Above Ground Job Shack Holding Tank 84" 40" 19" 84" L
40" W
19" H
No QL-1650 OR $ 730
300 Gallon Above Ground Septic Holding Tank
Ships Fast! ~ 48 Hour Lead Time
20% OFF
95" 56" 16" 95" L
56" W
16" H
1.7 LP0300-HTB MS $ 580
300 Gallon Above Ground Septic Holding Tank
Ships Fast! ~ 48 Hour Lead Time
95" 56" 16" 95" L
56" W
16" H
1.5 44234 MS $ 830
300 Gallon Above Ground Septic Holding Tank
Ships Fast! ~ 48 Hour Lead Time
94" 56" 16" 94" L
56" W
16" H
1.5 300GB MS $ 650
350 Gallon Above Ground Job Shack Holding Tank 89" 44" 25" 89" L
44" W
25" H
No QL-1661 OR $ 1,000
440 Gallon Above Ground Septic Holding Tank
Ships Fast! ~ 48 Hour Lead Time
91" 72" 16" 91" L
72" W
16" H
1.5 440GB MS, TX $ 880
500 Gallon Above Ground Septic Holding Tank
Ships Fast! ~ 48 Hour Lead Time
130" 52" 22" 130" L
52" W
22" H
1.9 44863 MS, TX $ 1,160
500 Gallon Above Ground Septic Holding Tank
Ships Fast! ~ 48 Hour Lead Time
94.5" 92" 17.15" 94.5" L
92" W
17.15" H
1.7 LP0500-HTB-MS MS, TX $ 880
500 Gallon Above Ground Septic Holding Tank 94.5" 92" 17.15" 94.5" L
92" W
17.15" H
1.7 LP0500-HT IA $ 880
500 Gallon Above Ground Septic Holding Tank 94.5" 92" 17.15" 94.5" L
92" W
17.15" H
1.7 LP0500-HTB IA $ 880
1000 Gallon Above Ground Septic Holding Tank
Ships Fast! ~ 48 Hour Lead Time
136" 91" 20" 136" L
91" W
20" H
1.9 1000GB MS, TX $ 2,800
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