'Polystone' Polypropylene Liner
The tubs core construction is a thick plastic (polypropylene) liner, which is then decorated with the
wooden staves, held on by the stainless bands. This type of plastic is used in many dierent water
based applications (water tanks etc.), so it is the perfect choice being light but strong.
Polypropylene is also chosen due to its toughness and elasticity, meaning the plastic is designed
to be able to bend and deform without breaking. In the purpose of use as a Hot Tub liner, there is
considerable pressure placed on the liner walls from the weight of the water and users. Over time,
this can result in slight deformation of the plastic and a small tolerance for warping, bowing, or
stretching of the liner should be expected. The Hot Tub will not leak however.
The liner relies on the wooden staves and stainless bands for structural assistance in holding the
water weight. Never ll the hot tub without checking the bands are installed correctly and tight.
Being plastic, it is also susceptible to scratching. Please note that due to the manufacturing process
there will be scratching to the unseen, underside of the base of the Hot Tub. This is normal.
It is dicult to guarantee that upon delivery the inner of the tub will be completely scratch free but
if any, it should be minimal and light. Over time as the tub is used, it will become lightly marked and
scratched and this is the nature of the product. Like a stainless-steel bench top, the markings will
become somewhat of a pattern and when the tub is lled, will not be noticable.
Stainless Steel Bands
Two stainless steel bands wrap around the outside of your Hot Tub, holding the wooden decorative
staves in place and providing support for the liner when lled. These bands will loosen over time so
readjustment will be needed every so often, which is simply done with two wrenches.
Upon delivery you may nd that some of the wooden staves are misaligned. When leaving the
manufacture, the bands are left slightly loose on purpose as there is signicant heating and cooling
(leading to expansion of the wood) during the long journey from Europe to your backyard.
You may need to assist a few staves back in place when re-tightening the bands.
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