De Marinis DESIGN SDRCR female-male reducing flue adapter

The De Marinis DESIGN SDRCR reducing adapter is a component of the DESIGN flue system designed to reduce the diameter of the connecting flue by joining a larger pipe section to a smaller one.

It features a female-male configuration: the male side corresponds to the larger Øn1 diameter, while the female side corresponds to the smaller Øn2 diameter.

The fitting is manufactured from 2 mm carbon steel with a matt black high-temperature finish and is intended for indoor flue connections used with wood-burning stoves, fireplaces and biomass appliances.

The range includes several reducing combinations between Ø200 and Ø120 mm, allowing the adapter to be selected according to the specific installation.

Main features

• Manufacturer: De Marinis
• Range: DESIGN
• Product family code: SDRCR
• Product type: reducing adapter
• Connection: female-male
• Function: reduction of flue gas passage diameter
• Øn1: larger diameter, male side
• Øn2: smaller diameter, female side
• Material: carbon steel
• Steel thickness: 2 mm
• Finish: matt black
• Application: wood-burning stoves, fireplaces and biomass appliances
• Diameter range: Ø200 to Ø120 mm depending on selected combination
• Temperature class: T600
• Pressure class: N1
• Marking: CE
• Reference standard: EN 1856-2:2009

What the DESIGN SDRCR reducing adapter is used for

The SDRCR is used where it is necessary to change from a larger flue diameter to a smaller diameter.

For example, it may be used where a larger flue section needs to connect to a smaller appliance connection or subsequent component.

Reducing the flue diameter changes the available cross-section for combustion products and should therefore be assessed according to the appliance characteristics, system design and manufacturer's instructions.

Before ordering, both diameters must be checked carefully: Øn1 identifies the larger male-side diameter, while Øn2 identifies the smaller female-side diameter.

Female-male connection

On the SDRCR adapter, the male end corresponds to the larger diameter, while the female end corresponds to the smaller diameter.

For example, an SDRCR150-120 has a Ø150 mm male side and a Ø120 mm female side.

This distinction is important because the connection direction determines the actual function of the adapter and should not be confused with the SDRCA increasing adapter.

Important: reducing the diameter of a connecting flue must comply with the appliance manufacturer's instructions and the technical sizing of the flue system. The adapter should not be selected only on the basis of mechanical fit.

Technical data and classification

The SDRCR belongs to the De Marinis DESIGN system manufactured in accordance with EN 1856-2:2009 for modular metal 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
• System designation: T600-N1-D-Vm-L01200-GXXXNM*

De Marinis dimensions and product codes

The table below lists the available SDRCR reducing adapter combinations. All dimensions are expressed in millimetres.

Øn1 indicates the larger male-side diameter, Øn2 the smaller female-side diameter, while Hu and I correspond to the dimensions shown in the technical drawing included on the product page.

Technical note: all SDRCR variants have Hu = 120 mm and insertion dimension I = 50 mm. Øn1 identifies the larger male-side diameter, while Øn2 identifies the smaller female-side diameter. Always refer to the technical drawing included on the product page.

How to read the technical drawing

• Øn1: larger nominal diameter, male side
• Øn2: smaller nominal diameter, female side
• Hu: useful fitting dimension, 120 mm
• I: insertion dimension, 50 mm

Comparing the product code, dimensional table and technical drawing helps identify the exact reducing adapter required and prevents selecting the connection in the wrong direction.

Difference between SDRCR and SDRCA

The SDRCR is a reducing adapter: it changes from a larger diameter to a smaller diameter.

The SDRCA performs the opposite function and is used as an increasing adapter.

For this reason, both nominal diameters and the male/female connection direction should always be checked before ordering.

DESIGN system compatibility

For correct dimensional continuity and system configuration, the use of De Marinis components from the same range is recommended, with careful verification of both diameters connected by the adapter.

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

Installation

The reducing adapter must be selected according to the connection diameters, appliance characteristics and technical sizing of the 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, De Marinis system requirements and applicable technical regulations.