When it comes to securing a caravan, the Purpleline Fullstop Torpedo Caravan Leg Lock has emerged as a popular choice among touring enthusiasts seeking robust protection against theft. Designed specifically for AL-KO and BPW chassis systems, this lock employs a torpedo-shaped barrel mechanism that clamps around the caravan’s corner steady legs, immobilising them and deterring opportunistic criminals. Its stainless steel construction and hardened steel shackle are engineered to resist cutting tools, while the compact design ensures compatibility with most caravan models without obstructing access to storage compartments or service panels.
One of the standout features praised by users is the lock’s straightforward installation process. Unlike some security devices that require professional fitting or complex adjustments, the Fullstop Torpedo utilises a simple two-part clamp system that can be attached in minutes. Owners appreciate how the lock’s pre-drilled holes align neatly with existing chassis fixtures, eliminating the need for additional drilling or modifications. “It slots into place like it was part of the original design,” remarked one caravan owner, highlighting how the lock maintains the vehicle’s aesthetic integrity while adding a visible security presence. The inclusion of a weatherproof cover over the locking mechanism has also been noted as a thoughtful touch, preventing dirt ingress and ensuring smooth operation in all conditions.
Security performance remains the cornerstone of this product’s appeal. The patented barrel lock design applies pressure to both sides of the caravan leg, creating a vice-like grip that cannot be loosened without the unique key. This dual-action locking system has garnered positive feedback, with several users commenting on how it provides “peace of mind” when leaving their caravans unattended at storage sites or campsites. Independent testing data suggests the hardened steel components withstand sustained attack from bolt croppers and angle grinders far longer than traditional locks, though manufacturers rightly advise combining it with wheel clamps and tracking systems for comprehensive security.
Practicality extends beyond mere theft prevention. The Fullstop Torpedo’s compact dimensions (measuring 220mm in length with a 15mm shackle diameter) make it suitable for caravans with limited clearance between the corner steadies and bodywork. Tourers with twin-axle models particularly appreciate how the lock doesn’t interfere with manoeuvring or levelling processes. A seasoned caravanner noted, “It stays clear of the jockey wheel during hitching, which is a godsend compared to bulkier alternatives that kept catching on our mover.” Furthermore, the stainless steel build resists corrosion from road salts and moisture – a critical advantage given the UK’s temperamental climate – with users reporting minimal maintenance beyond occasional lubrication.
Compatibility is another strong suit. Purpleline has engineered the Torpedo to fit AL-KO’s 2004-2023 chassis variants and BPW models produced from 2011 onwards, covering the majority of modern caravans. Those with older chassis systems should verify measurements before purchase, though several owners of pre-2010 caravans have successfully fitted the lock with minor adjustments. The universal key system allows a single key to operate multiple Purpleline security devices – a convenience factor applauded by owners who dislike managing separate keys for wheel clamps and hitch locks.
Some users have suggested areas for refinement, primarily regarding key operation in cold weather. A handful of reports mention slight stiffness in the locking mechanism during sub-zero temperatures, though this appears resolvable through regular application of graphite-based lubricants rather than petroleum products, which might attract grime. Others have requested brighter colour options to increase visual deterrence, though the current muted silver finish does discreetly blend with most chassis components.
In terms of day-to-day usability, the lock’s 1.6kg weight strikes a sensible balance between heft and portability. Storage proves simple thanks to the included protective pouch, which prevents scratches during transit. Seasoned tourers emphasise the importance of developing a consistent security routine – “It becomes second nature to fit it whenever we park up,” shared one family – and the Torpedo’s speed of deployment aids this habit formation.
While no security product can guarantee absolute theft prevention, the Purpleline Fullstop Torpedo Caravan Leg Lock delivers a formidable combination of physical resilience and user-friendly design. Its ability to integrate seamlessly with existing caravan systems while providing a substantial barrier against casual theft attempts explains its strong following among UK touring communities. For those prioritising discreet yet effective security that doesn’t compromise on convenience, this lock represents a sound investment in protecting one’s mobile home. As one long-term user summarised, “It’s the security equivalent of a faithful guard dog – quiet but always on duty.”
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