Changes

Plastic-lined tank

No change in size, 21:16, 13 April 2012

→‎Choosing a lining

'''Choice of lining needs further consideration''':<br>

* Needs to be food grade since the water it stores is for drinking.

* Cost: Polyethylene and Polythylene liners typically cost half that of Polypropylene and EPDM. PVC and PVC-E liners are the next step up from Polyethyleneand polyethylene in terms of cost. Compared to other liners, PVC is somewhat more affordable, while being somewhat puncture resistant at the same time but in terms of durability, the typical 20-mil (i.e. 0.020") thick PVC is somewhat mediocre in terms of durability. EPDM is more expensive than Polyethylene, polyethylene, and PVC liners, but can last for up to 20 years. Polypropylene is an expensive material but can last for up to 40 years.

'''Durability''': <br>

'''Sheet size''': <br>

* Ideally we should not have to weld sheets together in situ.

* The main advantage of polypropylene is that it comes in large sheets larger than 50’ x 100’. If you are building an extremely large pond, polypropylene may bea viable option.

* A limitation of EPDM is its size they typically arrive in sheets ranging from 5’ x 10’ to a 50’ x 100’ roll.

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Winona

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