Nationwide Delivery

Knowledgeable Staff

Outstanding Service

Secure payments

Manthorpe Extension Sleeve - Pack 20

SKU: G961

£55.63 Incl. VAT
£46.36 Ex. VAT

Pay in 3 interest free payments with PayPal on checkout. Choose PayPal at checkout. Learn more


The Manthorpe Extension Sleeve is an essential accessory for enhancing the functionality of Manthorpe’s range of telescopic underfloor void ventilators. Each sleeve provides an additional 150mm of extension, equivalent to two extra courses when used vertically, making it ideal for deeper underfloor voids. For horizontal applications, the sleeve can be seamlessly attached to the base of the G960 or G965 telescopic ventilators, allowing for effective extension through larger cavities or wider internal blockwork.

Packaged in a convenient pack of 20, these extension sleeves offer a flexible solution to meet various building requirements. Easy to install and compatible with the entire Manthorpe telescopic ventilator range, the G961 Extension Sleeve ensures optimal ventilation performance and adaptability for diverse construction scenarios.

Why Choose the Manthorpe Extension Sleeve - Pack 20?

  • Extension accessory for Manthorpe Telescopic Underfloor Vents
  • Up to 150mm extension
  • Strong & durable
  • Easy installation
  • Pack of 20

Product Specifications:

Material: Polypropylene

Colour: Black

Manufacturing Process: Injection moulded

Weight: 0.18kg per part (4kg per box)

Pack Size: 20 per box

Free Area: 6,450mm² with G930 Airbrick (7,000mm² G961 only)

Vertical Extension: 150mm (2 courses)

Horizontal Extension: 185mm

Deliveries are made on the basis the customer can accept the goods, or willingness to off load the goods, or having means of mechanical offload, this also applies to heavier items such as pallets etc. All deliveries are made ‘kerbside’ and often it can be at the discretion of the driver. A large majority of deliveries would be made on a large rigid tail-lift vehicle and off loaded via a pallet truck and only on to flat surfaces such as tarmac, concrete and pavers. If you do have restricted access, please contact us prior to placing your order. We will always try to accommodate your needs. If a delivery fails due to access, we reserve the right to make a re-delivery charge. All delivery charges are calculated when checking out. The delivery charges included are for the Mainland UK only and do not apply to the Scottish Highlands, or Isles off the Mainland. Additional charges may apply for deliveries that aren’t classed within the Mainland (this is classed by ourselves, suppliers and couriers) Please contact us on 01752 466151 or Due to the nature of our business model, this can mean your order will be sent via multiple deliveries. Whilst we will make every effort to deliver your goods within the stated/requested time frame, we cannot guarantee availability from the manufacturer or the manufacturer's delivery schedules, so we would recommend the end user not to start/schedule any work until the goods arrive. Due to logistics of various couriers and suppliers we are unable to give times of deliveries. However, please call or email us on the day of the delivery and we will try to get an approximate time. Deliveries can take place from as earlier as 07:30 right up to 18:00 depending on the courier/haulier and taking into account local traffic etc.
You have 14 days from receiving your item(s) to return them should you wish to do so. Please contact us should you wish to arrange a refund/return. Any product marked cut to size, bespoke or made to order are non returnable and excluded from our refund policy.

Have a Question?

Be the first to ask a question about this.

Ask a Question

Payment & Security

Apple Pay Google Pay Maestro Mastercard PayPal Shop Pay Visa

Your payment information is processed securely. We do not store credit card details nor have access to your credit card information.