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Professional Building Supplies£5.66Visit shop Manthorpe Building Products Black Subfloor Ventilation Vertical Extension Sleeve For G960
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The Manthorpe Vertical Extension Sleeve is an essential component for contractors and homeowners looking to extend the reach of their underfloor ventilation system. Designed specifically for the Manthorpe Telescopic Underfloor Ventilator range, it provides an additional 150mm of vertical extension, making it ideal for deep underfloor voids or projects involving higher brick courses. While the product is exceptionally easy to install, users should ensure their current ventilation layout is compatible with the unit's dimensions to maintain optimal airflow performance.
| Colour | Black |
|---|---|
| Model Part Number | 290252 |
| Brand | Manthorpe |
The sleeve provides an additional 150mm of vertical extension, equivalent to two standard brick courses.
No, the Manthorpe Extension Sleeve is specifically designed to work only with the Manthorpe range of Telescopic Underfloor Ventilators.
No, it is engineered to maintain an unobstructed airflow path of 6,600mm².
The product is designed to extend two brick courses; consult your site architect or building inspector before stacking multiple units to ensure structural and ventilation requirements are met.
The sleeve is finished in black and manufactured from high-quality, durable plastic suitable for foundation environments.
Ensure the push-fit connection is fully seated and the components are aligned straight without debris between the joints.
Check that the existing ventilator is clear of mortar debris and that the internal alignment guides are not damaged.
Installation is straightforward: ensure the base Manthorpe Telescopic Ventilator is properly seated, then align the extension sleeve with the primary unit. The push-fit connection requires a firm press to lock the components together. Compatibility is strictly limited to the Manthorpe telescopic ventilator series; do not attempt to force-fit with other manufacturer brands. Regarding care, the unit is largely maintenance-free; however, it is recommended to periodically inspect the exterior vent intake to ensure debris, soil, or vegetation has not obstructed the 6,600mm² airflow opening.
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