Flexible Connections & Expansion Joints

Flexible connections should be used on all fittings into and out of PE Storage tanks. This safeguards against leakage and stress over time.

  • Seismic Expansion Joints
  • Rubber Bellows
  • Painted, Zinc, Galv or Stainless Backing Rings
  • Threaded, Table D, E, ANSI.


Code Description
Flexible Connections & Expansion Joints

Promax Corrugated tanks are so tough you can bury them up to 1 metre in the ground - and they still retain their 20 year warranty!

Often a project can have height restrictions but also the need for a large amount of water storage - the Promax Corrugated big tanks are a perfect solution to this problem.

5,500 gallons

Installation costs vary from project to project - it depends on your exact situation!

We recommend you speak to your plumber or drainlayer to get a quote for installation.

Our products are available to be purchased through most rural and plumbing merchants, because the size of the range they normally order on request however some do hold a standard range in stock.

Our customer services team will be able to help point you to a local stockist - call us on 0800 77 66 29.

If it is your primary source of water, most district councils require you to have a minimum of 25,000 ltrs. 

Click here to learn how to purchase Promax product online.