The 300 x 300mm Recessed Internal Double Seal Manhole Cover and Frame is a compact, heavy-duty access solution engineered for discreet, flush-fitting placement in interior floors where tight sub-surface drainage, plumbing, or utility inspection points need to be concealed. Featuring a clear opening size of 300mm by 300mm, this recessed tray design allows the surrounding floor finish—such as ceramic tiles, vinyl, screed, or parquet—to be laid directly into the cover lid, rendering it virtually invisible once installed.
 
Manufactured from high-strength materials (typically pressed steel or corrosion-resistant composite surrounds paired with a galvanized steel tray), this unit is built to withstand regular foot traffic and light internal loads without flexing or compromising the floor surface. The integrated double-seal system incorporates a primary and secondary rubber gasket working in tandem with locking screws to provide an airtight and watertight barrier, effectively preventing unpleasant drain odors, sewer gases, and moisture from escaping into living or working spaces.
 
Designed for straightforward installation by builders and contractors, the outer frame features pre-drilled fixing flanges and a low-profile depth that integrates seamlessly into standard concrete subfloors or screed layers. Whether you are finishing a tight utility service corridor, a compact domestic cloakroom, or a restricted floor void, this trade-quality recessed manhole cover delivers reliable odor control, easy access to underground services, and a sleek, uninterrupted architectural finish.
 
3100 SERIES FEATURES
Recessed lids enabling concrete or concrete & floor finish infill
Solid steel base plate
Keying in bars fitted within lid recess
Specially produced matching lid and frame section
Brass edge & stainless steel edging available
Double rubber sealed and locked as standard
Manufactured under an ISO 9001:2000 Quality System
Finish: Hot dipped galvanised to BS EN ISO 1461 as standard