Tank Adapter / Bulkhead Adapter

Tank adapter designed to connect a 3/4" or 1/2" NPT pipe fitting to a rain barrel.

A few years back I converted a used 220 litre pickle barrel into a rain barrel.
As my vegetable garden has grown, a single barrel of water is not enough to get through more than a few days without rain. The simple solution was to add more barrels.

After purchasing two more barrels, I discovered that the tank adapter was no longer available at my local hardware store and the cost was $45 or more on Amazon.
Since I needed two adapters for _each_ of the new barrels plus one for the existing barrel, the cost was quickly becoming prohibitive.

After a few (many) hours with OpenSCAD and a few hundred metres of filament for tests and prototypes, here is a serviceable tank adapter. Cost is under $5.

You will need to print (in PETG _or_ ABS):
1 x tank_adapter
1 x tank_adapter_nut
and (in TPU):
1 x tank_adapter_seal


The tank adapter and nut are best printed in PETG. It has excellent