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4 metre x 3 metre Underlay for Pond Liners

underlay for Essential to preserve the durability of your liner. Our liners are only guaranteed when an aquatic underlay is used.


More info for this pondliner underlay:


pond liner suitable for pond (at 1m depth)
length width length width volume
4m 3m 1m 0m 0 litres

Choose a quality:


Our underlay for pondliners are available in either basic or best quality. Choose which guarantee pondliner you want below:

basic quality £13.20
best quality £20.40

Buy a pondliner with a 40 year guarantee and get half price underlay.

Have you chosen a pond liner?


We have the following pond liners to match this underlay:

15 year guarantee £17.88
25 year guarantee £21.48
40 year guarantee £27.48


Pond Liner Calculator

calculatorOur pond calculator will help you to find the right size liner for your pond


If you need any help or further information please contact us.


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pond liner


Pondkeeper are UK suppliers of pond liners, underlay, pond pumps, filters and other pond equipment and water garden accessories.