Roof Ventilation

GRPA / GRPA-1 / GRPA-3

Designed for use with the Manthorpe Slate and Tile Vents, the GRPA Flexible Pipe range provides an economical, quick and effective connection to standard 4" soil pipes and ventilation systems.

  • Description & Key Features

    Product Description

    Specially designed for use with the Manthorpe slate and tile vents, the GRPA Flexible Pipe range provides an economical, quick and effective connection to standard 4" soil pipes and ventilation ducting systems.

    The 455mm long GRPA pipe is made from flexible, low-density polyethylene and is supplied with worm drive band clamp for secure fitting. It has an oval connection on one end to attach to the spigot on the GRSV slate vent range which can also be trimmed to fit a 4" circular pipe outlet, with the other end providing a standard 4" duct connection.

    The longer 645mm GRPA-1 will work with both standard 4" circular pipes/spigots along with the oval connectors on the GRSV slate vents without the need for additional modification.

    Each Manthorpe Flexipipe allows 8,000mm² of airflow and is supplied with its own metal screw clamp for simple fixing.

    The GRPA3 Reduction Adaptor fits over the Flexible Pipe end and can be used convert the 4” diameter product to attach to 3" ventilation products.

    Key Features

    • GRPA and GRPA-1 fit the oval spigot of the Manthorpe Slate Vent plus 4" round connections
    • Pipe lengths vary from 455mm to 645mm
    • GRPA/3 reduces 4" pipes down to 3"
    • Screw clamp for simple fixing
  • Technical

    Fitting Requirements

    Use metal jubilee clamp to hold end on vent spigot, it may be necessary to trim end (A) along marked line.
    Push end into the soil pipe or ducting.

    Oval connection for GRSV slate vents should be pushed inside of the slate vent spigot to connect.

    NB. Connections to Refurb Slate Vents (GRSV30/25R and GRSV45R) not possible due to lack of spigot.

    Certifications

    N/A

    Regulations & Standards

    BS 5250:2011 Control of Condensation in Buildings

    BRE Digest Report 262: Thermal Insulation: Avoiding Risks.

  • Specifications

    Size Information

    GRPA:
    455mm long

    GRPA-1:
    645mm long

    GRPA/3:
    4" to 3" diameter

    Material

    GRPA - GRPA-1:
    Polyethylene

    GRPA/3: ABS

    Colour

    Black

    Quantity Information

    GRPA:
    10 per box

    GRPA-1:
    5 per bag

    GRPA/3:
    10 per box