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Safe Cache


Safe Cache Underground Storage System

  • Comes in a do-it-yourself kit including O-Ring and lubricant.
  • Does not include 6″ sewer pipe or pipe cement.
  • Easy to assemble with complete easy to follow instructions
  • Volume = 329.75 cubic inches, 0.191 cubic feet per foot of pipe length.
  • Fits nicely inside 8″ sewer pipe casings

Check out the Volume Calculator to determine the internal volume of the Safe Cache and the amount of water the tube will hold.

Got a question?  Give us a call.  702-533-4363

The Safe Cache is also available through Keene Engineering, Chatsworth, CA.

Data Sheet

pdf  Safe Cache Underground Storage System Data Sheet

YouTube Videos

Holey-Moley Digger YouTubeSafe Cache Underground Storage System Introduction – 2 minutes 20 seconds

Holey-Moley Digger YouTubeSafe Cache Underground Storage System Instructions – 14 minutes

2 in stock (can be backordered)

SKU: SCK Category: Godaddy Secured Payment Methods


Safe Cache Underground Storage System

The Safe Cache Underground Storage System is a Kit providing everything you need for making a 6-inch Cache Tube (except 6-inch sewer pipe and solvent weld primer and glue). The 6-inch “backbone” pipe of the Holey-Moley 6” Post Hole Digger works very well as the Safe Cache Tube pipe. All you need to do is cut it to length. Many pipe suppliers have damaged 6-inch ASTM D-3034 Sewer Pipe that may be picked up free. The Safe Cache Tube when finished provides a long term, well sealed, and well-protected tube for long-term underground storage. The tube provides 329.75 cubic inches, 0.191 cubic feet of storage per foot of pipe. Sewer Pipe comes in different colors; take your cap along to check fit.

Low Cost

This underground storage system is the lowest cost cache tube available on the market.  The lower cost allows for multiple shorter tubes to be stacked on tope of each other inside an 8-inch casing. This provides added safety by separating different materials to reduce the risk of loss or cross contamination from volatile items being stored with fragile items in the same tube.

Key Features

The assembled Storage Tube will fit easily inside a borehole made with the Holey-Moley Digger that is approximately 7-inches in diameter. The Safe Cache Storage Tube kit uses the same “backbone pipe” used in the Holey-Moley Digger. The locking tab cap, with O-Ring seal provides for easy access and is easy to reseal. The finished Safe Cache fits inside an 8-inch sewer pipe casing for easy withdrawal and the further security of a casing cap. See the Holey-Moley 8-Inch Flexible PVC Pipe Cap, and the 8-Inch PVC Pipe Cap for further ideas.

The Safe Cache Kit is Ideal for:

  • Storing Valuables
  • Storing Food
  • Emergency Kit
  • Emergency Water Container after you remove emergency kit
  • Protective case for transport.
  • Map Case.

Assembly Information

Assembly Instructions

Kit Guidelines

Other Information

See our videos page for more information on our diggers and reamers.  In addition, there is also information on cache tubes, product reviews and introductions to new products.

Our distributor Keene Engineering , manufacturer of gold dredging equipment, in Chatsworth, CA is now carrying most of our products.

For more information give us a call. We are here to help.


Additional information

Weight 1.00 lbs
Dimensions 8.0 x 8.0 x 6.0 in

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