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Vintage Travel Trailer Water Tanks & Holding Tanks

Water tanks are a useful tool in your travel trailer setup. They can be used to hold drinking water, sink or shower water (sometimes called grey water), and wastewater (sometimes called black water). Depending on the model of your trailer, camper, or RV, there are different size dimensions to keep in mind in order to make sure that your travel trailer holding tank fits safely and securely in your trailer. Here at Vintage Trailer Supply, we stock fresh water, grey water, and black water tanks for Airstreams from 1970 - 1975 as well as other vintage trailer models. Along with our water tanks, we offer additional plumbing and water system management tools and accessories, including portable water tanks for removing waste water, hoses, valves, caps and more. No matter your vintage trailer model and no matter your size restrictions, shop Vintage Trailer Supply for your Airstream water tank needs.


20 Gallon Fresh Water Holding Tank 23 Gallon Fresh Water Holding Tank 31 Gallon Tank Airstream Above Floor Fresh Water Tank (1960's)
20 gallons. Excellent size for most vintage trailers. 20 gallons. Excellent size for most vintage trailers. 31 gallons. Ample fresh water storage.

28 gallons. Great tank for 1960's Airstreams

15 Gallon Tank Airstream 30 Gallon Flat Water Tank (1968-71) Airstream Fresh Water Tank (1970-75) Gray Tank 5" Chassis Frame
Most common tank in Shastas and others.

30 gallons. Unique flat tank with baffles.

45 gallons. Fits many 1970-75 Airstreams.

21 gallons. Less than 5" thick.
19 Gallon Cut Corner Tank Gray Water Tank 50" Portable Gray Tank, 10 Gallon Low Profile Portable Gray Tank, 15 Gallon Low Profile
19 gallons. Less than 5" thick. 16 gallons. Less than 4" thick! Compact unit for convenient storage. A lot of gray storage in a very low profile unit.
Pie Slice Black Tank Black Tank for 1969 Airstream Caravels Airstream Black Water Tank (1974-75) Airstream Black Tank
Black tank for hard-to-fit corners. A black tank for your Caravel!

Black tank for 1974-75 Airstreams

Fittings are pre-installed.

Corner Black Tank Black Tank Fill Hose to Tank Adapter 1/2" MPT Adapter
11+ gallons. Ideal for rear corners in Airstreams. Compact size fits many vintage trailers. For fresh water fill hook up. Connect PVC hose to your tank.
1/2" MPT Adapter Flexible Tank Wand Gray Flushing Hose Plug 1-1/2 MPT ABS
Tubing Adapter to 3/8" MPT
Starting At: $0.99
Gray Water Hose 15'
Price: $11.99
Plug 1-1/2 MPT
Price: $1.49
Connect PVC hose to any 3/8" threaded opoening. Keep your holding tank clean. Use a designated hose. Great cleanout plug for any tank.
1/2" MPT Plug Drain Valve 3/8" MPT or 1/2" MPT 1/2" FPT Cap 58-1/4" x 14" x 12" Fresh Water Tank
1/2" MPT Plug
Price: $0.99
Tank Drain Valve
Price: $4.99
1/2" FPT Cap
Price: $2.49
Used with fresh water tanks. Easy drain valve option for fresh water tanks. Easily cap off a 1/2" MPT fittings. 42 Gallon Fresh Water Tank
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