Manthorpe Vertical Extension Sleeve Telescopic Underfloor Void Vent

Product Code
Manthorpe Vertical Extension Sleeve Telescopic Underfloor Void Vent
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£12.38 £10.32
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The G961 extension sleeve provides 7,000mm2 airflow.

The G961 Vertical Extension Sleeve can be used to extend the G960 Telescopic Under Floor Void Ventilator vertically and horizontally.
Each extension sleeve enables a further two-course brick adjustment vertically by 150mm. Alternatively, the sleeve can also be clipped to the base of the G960 to provide a horizontal extension of 185mm through larger cavities or wider internal blockwork.
The G961 Vertical Extension Sleeve should be used in conjunction with other products from the Manthorpe range provide a complete through wall ventilation system.

More Information
Brand Manthorpe

Delivery charges

Minimum order delivery charges are applicable to certain products. More information about can be found on our Delivery Information page.

Online orders below £300 ex VAT are subject to delivery charges, as stated below:
- £0 - £149.99 ex Vat , Delivery charge £25 +VAT (£30 incl VAT)
- £150 - £300 ex Vat, Delivery Charge £20 + VAT (£24 incl VAT)
- £300 ex Vat + : No delivery Charge.

Returns & Refunds

We want you to be happy with your purchase, however if you change your mind you can return it to us. We will take back any items that are in a resellable condition within 14 days of purchase.

You can either:
Return it to your local with proof of purchase
Arrange collection by emailing us at with your order number and product details The return of perishable items (i.e. cement, plaster) will not be accepted.

*Please note that our minimum charge for this collection service is 15% of the order value and may be more depending on your location and product type. Once the products have been returned, you will be refunded within 7 days.