Cast iron manhole cover SML 125 with rectangular inspection chamber (grey cast iron, cupless) 10128

Socketless system for gravity sewage installations

The SML 125 cast iron cleaning eye with rectangular inspection is an element of a socketless system of grey cast iron pipes and fittings, designed for gravity sewage and drainage installations inside buildings. The system is manufactured in accordance with the EN-877 standard, which guarantees the highest standards of quality and safety.

System elements are connected using appropriate pipe clamps, couplings, bands, and connectors, ensuring leak-proof and durable connections. The cleaning eye with dimensions 0,17 × 0,19 × 0,37 m weighs 10,55 kg, which testifies to its solid cast iron construction.

Construction and advanced protective coatings

Socketless grey cast iron forms the basis of the construction, providing exceptional durability and resistance to mechanical damage. The external surface is covered with a layer of reddish-brown primer with a thickness of 40 μm, which can be additionally coated with a standard colored lacquer or a coating composition.

A key role is played by the internal coating made of fully cross-linked epoxy resin in an ochre (yellow-brown) color with a thickness of 120 μm, applied by spraying. It protects the pipe against aggressive sewage and corrosive processes.

In the case of fittings, the colored coating is applied by immersion to all surfaces and then cured for 45 minutes at a temperature of approximately 180°C. This process creates a high-strength bond between the fitting and the coating.

Fire safety and acoustic comfort

Cast iron products manufactured according to the EN-877 standard are non-flammable and non-combustible, classified as A2 according to EN 13501. In the event of a fire, they maintain their functional properties for many hours - the walls remain impermeable to flames and gases, do not crack, and do not lose their operational capacity.

Thanks to the high density of the cast iron and the buffering effect of the rubber seals at the connecting elements, material sound transmission has been reduced to a minimum. The system offers almost silent drainage, significantly increasing acoustic comfort in office and residential buildings.

Durability and ecology

The system is characterized by high thermal and chemical resistance thanks to advanced epoxy coatings. The smooth internal surface creates favorable conditions for sewage flow and provides resistance to abrasion.

The stability of the construction is manifested by resistance to impact and deformation, as well as low thermal expansion (0,0105 mm/mK), comparable to concrete - this allows for trouble-free concreting of the pipes.

The material is 100% recyclable, produced mainly from iron scrap without wasting natural resources. Installation is easy and fast, requiring no special tools, which translates into time savings during installation.

Compliance with the very strict requirements of the EN 877 and RAL-GZ 698 standards confirms the highest quality of workmanship and the longevity of the entire SML system.