Motorhome, caravan and campervan water tanks form the backbone of onboard fresh water systems, ranging from compact 20-litre units for weekend trips to substantial 100+ litre installations for extended off-grid adventures. The industry standard Fiamma 70-litre tank exemplifies modern design with food-grade MDPE polyethylene construction, dual installation options (vertical/horizontal), and comprehensive fitting kits including 38mm inlet connections and 13mm breather outlets. Professional converters favour these rotomoulded tanks for their seamless one-piece construction that eliminates structural weaknesses, while the medium-density polyethylene material provides optimal strength-to-weight ratios and resistance to UV degradation, chemicals, and bacterial growth.
Tank selection depends critically on vehicle payload capacity, available installation space, and water consumption patterns - with each litre adding precisely 1kg to vehicle weight when full. Underslung configurations maximise interior space but require protection from road debris and winter freezing, while internal tanks offer easier access for maintenance and cleaning through removable inspection hatches. C.A.K Tanks specialise in bespoke solutions with custom shapes to utilise awkward spaces, incorporating features like anti-frost elements, threaded service hatches, and multiple outlet positions to optimise plumbing layouts. The latest designs include translucent sections for visual level monitoring and ergonomic access caps that simplify cleaning and chemical treatment procedures.
Installation requires careful consideration of gravity feed versus pressure pump systems, with tank positioning affecting flow rates and pump efficiency. Food-grade certification ensures all materials meet drinking water standards without leaching chemicals or imparting taste, while proper venting prevents vacuum formation during water draw-off. Modern tanks feature multiple threaded boss positions allowing flexible plumbing configurations, though professional installation ensures warranty compliance and optimal performance. The main limitation involves payload management - larger tanks reduce available cargo capacity significantly, and partial filling during travel maintains vehicle stability while providing operational flexibility at destination.
The Fiamma 70 Litre Water Tank is an essential component for any carav
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A 20-litre water storage tank manufactured from a durable, food grade
T5 FRESH WATER TANK -57 LITRE Dimensions 10 × 20 × 30 cm
20L WATER CONTAINER Ideal for campervans and specifically designed
Frequently Asked Questions
What size water tank do I need for my caravan or motorhome?Tank size depends on usage patterns, trip duration, and payload capacity. Solo travellers typically need 40-70 litres, couples require 70-100 litres, while families need 100+ litres. Calculate roughly 15-25 litres per person per day including cooking, washing, and drinking. Remember each litre adds 1kg weight, so a 70-litre tank weighs 70kg when full plus the tank weight of around 4kg, significantly impacting vehicle payload.What's the difference between MDPE and HDPE water tanks?MDPE (Medium Density Polyethylene) offers the optimal balance of strength, flexibility, and weight for caravan applications. It's more flexible than HDPE, reducing stress cracking during travel vibrations, while providing excellent chemical resistance and UV protection. HDPE is harder but more brittle. Both are food-grade certified, but MDPE's superior impact resistance makes it preferred for mobile applications where tanks experience constant movement and temperature variations.Should I install my water tank vertically or horizontally?Installation orientation depends on available space and plumbing requirements. Vertical installation typically provides better gravity feed pressure to pumps and reduces the tank's footprint. Horizontal mounting offers lower centre of gravity for vehicle stability and easier access for maintenance. Most tanks like the Fiamma 70L feature multiple outlet positions to accommodate either orientation. Consider pump placement, accessible cleaning access, and structural mounting points when deciding.How often should I clean and sterilise my water tank?Clean tanks every 3-6 months during regular use, before first seasonal use, and after any contamination concerns. We offer a range of water tank purification additives. Tanks with inspection hatches allow physical cleaning with brushes. Always use food-grade cleaning products and ensure complete rinsing to maintain water quality and taste.Can I install a larger tank than originally fitted to my caravan?Yes, but consider payload implications and structural mounting requirements. Upgrading from 40L to 70L adds 30kg when full, requiring stronger mounting brackets and potentially reducing cargo capacity. Check your caravan's maximum payload and ensure adequate fresh water pump capacity. Larger tanks may require repositioning other components and upgrading to pressure-switched pumps for reliable operation. Always secure tanks properly to prevent movement during travel.Do I need anti-frost protection for my water tank?Anti-frost elements are essential for winter caravanning or storage in unheated areas. Freezing water expands by approximately 9%, potentially cracking tanks and damaging fittings. Electrical heating elements with thermostats maintain temperatures above freezing, typically consuming 50-100 watts. Alternatively, drain tanks completely for winter storage or use propylene glycol antifreeze in non-potable systems. Underslung tanks are particularly vulnerable and should always include freeze protection in temperate climates.What fittings and connections do I need for tank installation?Standard installations require inlet connections (typically 38mm for filling), outlet fittings (usually 12-15mm for pump connections), breather pipes (10-13mm), and level monitoring if desired. Most quality tanks include comprehensive fitting kits with threaded bosses, sealing washers, and mounting hardware. You'll also need appropriate hose, clips, and possibly tank brackets depending on installation method. Professional installation ensures proper sealing and warranty compliance, particularly for bespoke or underslung configurations.
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