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34mm Round Dry Lining Box - White PVC

£149
The RRP is the manufacturer's recommended retail price of the item.
Limited Stock
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Minimum order for this item is 10.

Description

The Knightsbridge 34mm round dry lining box is a white PVC housing designed for mounting downlights, smoke alarms and other electrical fittings into dry-lined cavity ceilings. The box has a 79mm outer diameter, a 34mm recessed depth and requires a 62mm cut-out in the plasterboard. Two 20mm knockouts at the rear allow cable entry from different angles depending on the routing.

Designed for residential and commercial installations where ceiling fittings need to be recessed into plasterboard backed by a cavity (typically 50-100mm air gap or insulation before the structural ceiling), the box provides fire containment and cable protection behind the visible fitting. The spring-loaded side tabs grip the rear face of the plasterboard when pushed through the 62mm hole, holding the box in place without additional fixings.

The white PVC construction is certified to BS 5733, the British Standard for general purpose electrical boxes and enclosures. The 34mm depth suits most LED downlights, GU10 fire-rated downlights and mains-powered smoke alarms that specify a shallow mounting depth. The box is supplied in shrink-sealed Knightsbridge multipacks.

Specification
Diameter 79 mm
Recessed Depth 34 mm
Cut-out Diameter 62 mm
Construction PVC
Finish White
Warranty 25
Downloads

Product Specification Sheet

Frequently Asked

What ceiling depth is required?

The box needs a minimum 34mm cavity depth between the plasterboard and the structural ceiling above. Most standard UK dry-lined ceilings provide 50-100mm cavity, so the 34mm box fits comfortably with room for cable routing and insulation clearance.

How is the box fitted?

Cut a 62mm hole in the plasterboard at the fitting location. Feed the cable through one of the rear knockouts, then push the box up through the hole from below. The spring-loaded side tabs will grip the back of the plasterboard and hold the box in place without screws or additional fixings.

What fittings does it suit?

The 34mm depth suits most LED downlights, GU10 fire-rated downlights and mains-powered smoke alarms. Check the specific fitting's required mounting depth before ordering — some larger halogen downlights or adjustable spotlights may need a deeper box.

Is it certified for fire protection?

The box is certified to BS 5733 for general electrical enclosures. For fire-rated ceiling assemblies, pair the box with fire-rated downlights that carry their own fire certification (typically 30, 60 or 90 minutes).

Shipping & Returns

Delivery UK delivery is £14.99, and delivery is free on all orders of £99 or more, in the UK and internationally.

Returns If you change your mind, you have 14 days from delivery to tell us, and a further 14 days to send the goods back. Return postage for a change-of-mind return is paid by you. Change-of-mind returns are subject to an inspection and handling deduction. See our full returns policy.

To arrange a return, call us on 020 8149 5199 or use our contact page.

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Free delivery on orders over £99, in the UK and worldwide. Easy returns within 14 days, subject to our returns policy. Full manufacturer warranty included.

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    Description

    The Knightsbridge 34mm round dry lining box is a white PVC housing designed for mounting downlights, smoke alarms and other electrical fittings into dry-lined cavity ceilings. The box has a 79mm outer diameter, a 34mm recessed depth and requires a 62mm cut-out in the plasterboard. Two 20mm knockouts at the rear allow cable entry from different angles depending on the routing.

    Designed for residential and commercial installations where ceiling fittings need to be recessed into plasterboard backed by a cavity (typically 50-100mm air gap or insulation before the structural ceiling), the box provides fire containment and cable protection behind the visible fitting. The spring-loaded side tabs grip the rear face of the plasterboard when pushed through the 62mm hole, holding the box in place without additional fixings.

    The white PVC construction is certified to BS 5733, the British Standard for general purpose electrical boxes and enclosures. The 34mm depth suits most LED downlights, GU10 fire-rated downlights and mains-powered smoke alarms that specify a shallow mounting depth. The box is supplied in shrink-sealed Knightsbridge multipacks.

    Specification
    Diameter 79 mm
    Recessed Depth 34 mm
    Cut-out Diameter 62 mm
    Construction PVC
    Finish White
    Warranty 25
    Downloads

    Product Specification Sheet

    Frequently Asked

    What ceiling depth is required?

    The box needs a minimum 34mm cavity depth between the plasterboard and the structural ceiling above. Most standard UK dry-lined ceilings provide 50-100mm cavity, so the 34mm box fits comfortably with room for cable routing and insulation clearance.

    How is the box fitted?

    Cut a 62mm hole in the plasterboard at the fitting location. Feed the cable through one of the rear knockouts, then push the box up through the hole from below. The spring-loaded side tabs will grip the back of the plasterboard and hold the box in place without screws or additional fixings.

    What fittings does it suit?

    The 34mm depth suits most LED downlights, GU10 fire-rated downlights and mains-powered smoke alarms. Check the specific fitting's required mounting depth before ordering — some larger halogen downlights or adjustable spotlights may need a deeper box.

    Is it certified for fire protection?

    The box is certified to BS 5733 for general electrical enclosures. For fire-rated ceiling assemblies, pair the box with fire-rated downlights that carry their own fire certification (typically 30, 60 or 90 minutes).

    Shipping & Returns

    Delivery UK delivery is £14.99, and delivery is free on all orders of £99 or more, in the UK and internationally.

    Returns If you change your mind, you have 14 days from delivery to tell us, and a further 14 days to send the goods back. Return postage for a change-of-mind return is paid by you. Change-of-mind returns are subject to an inspection and handling deduction. See our full returns policy.

    To arrange a return, call us on 020 8149 5199 or use our contact page.