What is a P-Trap Gully used for?

A P-Trap Gully provides a water seal in drainage systems to block foul air from entering, while allowing wastewater to flow into underground drains.

Does this gully include a built-in trap?

Yes. The UGG3 includes an integral P-trap water seal to prevent foul odour from returning through the drainage system.

What pipe sizes can connect to the inlet of this gully?

The gully accepts standard 32mm, 40mm and 50mm waste pipes through rubber seal adapters, making it suitable for most domestic waste connections from sinks, baths and appliances.

How deep is the water seal in the P-trap?

The integral P-trap provides a 50mm water seal depth, which meets UK building regulations for preventing drain odours whilst allowing efficient waste flow.

Can this gully be used for surface water drainage?

Yes, it's suitable for both foul water and surface water applications, making it ideal for connecting rainwater downpipes or yard gulley installations to the underground system.

What's the maximum depth this gully can be installed at?

This gully is designed for shallow installations, typically up to 600mm deep from ground level. For deeper installations, extension pieces or alternative solutions may be required.

Does the spigot outlet fit standard 110mm underground pipes?

Yes, the spigot outlet is sized to fit directly into standard 110mm underground drainage pipes and fittings from all major UK manufacturers including FloPlast, Polypipe and Brett Martin.

Is there a removable grating or cover included?

The basic gully unit doesn't include a grating - you'll need to purchase a compatible 110mm gully grating separately if surface access or debris protection is required.

What bedding material should be used when installing this gully?

Install on a firm bed of concrete or compacted granular material, ensuring the gully remains level and properly supported. Backfill with pea gravel or concrete around the base for stability.

Can rodding access be achieved through this gully?

The gully design allows limited rodding access downstream, but it's not intended as a primary rodding point. Install proper inspection chambers nearby for comprehensive drain maintenance access.

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Fascias, Guttering, Windows & More

The FloPlast 110mm Underground P-Trap Gully provides a reliable connection point for waste and rainwater pipes entering underground drainage systems.
Designed to BS EN 1401-1, this PVC-U gully includes an integral P-trap water seal that prevents foul odours escaping from the drain, ensuring a hygienic and secure installation.

Its design makes it perfect for connecting sink, bath, or rainwater discharges directly into the 110mm underground system, with a standard spigot outlet compatible with all major UK brands.