4 Gallon / 18 Litre Primary Expansion Cistern

4 Gallon / 18 Litre Primary Expansion Cistern

Product Code: 181212

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  • Buy 2 for £22.86 each plus Vat, save 2%
  • Buy 10 for £22.16 each plus Vat, save 5%
Exc. Vat £23.33 £28.00 Inc. Vat

Shipping from £17.50 (£21.00 inc Vat)

(Certain postcodes in Wales, Scotland, Highlands and Islands may cost more,
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Product Details

POLYTANK Primary Expansion Cistern

Includes PT2/A Package consisting of:
• Snap On Polylid
• 1/2" BS1212 Part 2 Ballvalve
• Ballvalve Backplate
• 4 1/2" Float
• 15mm Compression Tank Connector
• Sealing Washer 
• Insulation & Ties

Actual capacity shown
Actual capacity = float level water line
Nominal capacity= full capacity to top of tank


Product Attachments

View FilePolytank Fitting Instructions    Size: (1.95 MB)

How to fit your polytank correctly

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Please call us for delivery to postcodes in Wales, Scotland, Highlands and Islands.


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Product Code: 181212
Height (mm): 320
Length (mm): 480
Width (mm): 250
Capacity (Litres): 18
Capacity (Gallons): 4
Colour: Black
Shape: Rectangle
Material: MDPE
WRAS Approved: Yes
Potable: Potable
Tank Use: Above Ground
SKU: 181212

Capacity: 18 Litres / 4 Gallons
(minimum to waterline)

Length: 480mm / 19"
Width: 250mm / 10"
Height: 320mm / 13"

Please note: Tank sizes quoted are subject to a +/- 3% variation

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