45° De Marinis DESIGN SDC4I wood stove elbow with inspection access

The De Marinis DESIGN SDC4I 45° elbow is a component of the DESIGN flue system designed to create a 45-degree change of direction in the flue connection of wood-burning stoves, fireplaces and biomass appliances.

Unlike the standard SDC4 elbow, the SDC4I features an inspection opening, providing easier access to the inside of the fitting for periodic checking and cleaning of the connecting flue.

It is manufactured from 2 mm carbon steel with a matt black high-temperature finish. Its robust construction and clean appearance make the DESIGN range particularly suitable for visible indoor installations.

The elbow is available in nominal diameters Ø 120, 130, 140, 150, 160, 180 and 200 mm.

Main features

• Manufacturer: De Marinis
• Range: DESIGN
• Product family code: SDC4I
• Product type: fixed 45° elbow with inspection access
• Angle: 45°
• Function: change of direction or offset in the flue connection
• Inspection: access for internal checking and cleaning
• Material: carbon steel
• Steel thickness: 2 mm
• Finish: matt black
• Application: wood-burning stoves, fireplaces and biomass appliances
• Available diameters: Ø 120, 130, 140, 150, 160, 180 and 200 mm
• Temperature class: T600
• Marking: CE
• Reference standard: EN 1856-2:2009

What the DESIGN SDC4I elbow is used for

The SDC4I is used where a 45-degree change of direction is required while also providing an accessible inspection and cleaning point in the connecting flue.

It can be used individually or together with other components to create an offset and connect points that are not perfectly aligned.

A 45° change of direction can provide a more gradual flue route than a 90° elbow where permitted by the installation layout.

Before purchasing, select the correct diameter and check that it matches the appliance flue outlet and the other DESIGN components used in the installation.

Inspection and cleaning access

The distinguishing feature of the SDC4I is its dedicated inspection opening, which provides access to the inside of the elbow.

Soot and combustion residues can accumulate around changes of direction in a wood-burning appliance flue connection. An accessible inspection point therefore facilitates periodic checking, cleaning and maintenance.

The accessibility of the inspection opening should be considered during installation so that it remains usable for future maintenance operations.

Important: the inspection opening must be correctly closed before operating the appliance. Inspection, cleaning and maintenance of the flue system must be carried out in accordance with the manufacturer's instructions and applicable requirements.

45° elbow and flue configuration

Every change of direction alters the route of combustion products and must be considered when designing the connecting flue.

The number and position of elbows, their angle, pipe lengths and overall route must be assessed according to the appliance characteristics and available chimney draught.

The flue connection must comply with the appliance manufacturer's instructions and applicable technical regulations.

Technical data and classification

The SDC4I belongs to the De Marinis DESIGN system manufactured in accordance with EN 1856-2:2009 for flue systems and connecting flues used with biomass appliances.

• Temperature class: T600
• Pressure class: N1
• Condensate resistance: D
• Corrosion resistance class: Vm
• Material: 2 mm carbon steel

De Marinis dimensions and product codes

The table below lists the available SDC4I 45° inspection elbow variants. All dimensions are expressed in millimetres.

Øn indicates the nominal diameter, while A, B, C, D and I correspond to the dimensions shown in the technical drawing included on the product page.

Technical note: dimensions A, B, C and D vary according to nominal diameter, while insertion dimension I is 50 mm for all SDC4I variants. The elbow features an inspection and cleaning opening. Always refer to the technical drawing included on the product page to check the actual overall dimensions.

How to read the technical drawing

• Øn: nominal elbow diameter
• A: dimension varying according to nominal diameter
• B: overall dimension shown in the drawing
• C: overall geometric dimension
• D: elbow dimension shown in the technical drawing
• I: insertion dimension, 50 mm
• Inspection: dedicated opening for internal checking and cleaning

Comparing the technical drawing, dimensional table and selected diameter helps verify the installation space required and identify the exact De Marinis product code.

DESIGN system compatibility

For correct dimensional continuity and system configuration, the use of De Marinis components from the same range and with the same nominal diameter is recommended.

Before combining components from different systems or manufacturers, their dimensional, technical and regulatory compatibility must be checked.

Installation

Diameter, elbow position, accessibility of the inspection opening, number of changes of direction, total connecting flue length, draught and safety clearances must be assessed according to the appliance and flue system.

The DESIGN system is intended for indoor installation. Installation must be carried out by qualified personnel in accordance with the appliance manufacturer's instructions and applicable technical requirements.