Sanha NiroTherm Reducing Nipple

Sanha NiroTherm reducer is a reducer with one universal press end and one male plain end. The item belongs to the NiroTherm press fitting system (series 91000) made of stainless steel. According to Sanha, the system is intended for closed heating and cooling circuits, technical gases, compressed air, rainwater and treated water; according to Sanha, it is not permitted for drinking water.

New dimensions from 2024 in mm according to the Sanha NiroTherm installation dimensions data sheet (as of 16.10.2025); the column designations correspond to the drawing in the data sheet (d pipe outside diameter, z Z dimension). For the other sizes, the data sheet contains no clearly assignable values.

• Since 2024, according to Sanha, items of this series have new overall dimensions and a slightly smaller insertion depth; items with the new dimensions carry an additional X on the label.
• Marking according to Sanha: red dot on the fitting (not permitted for drinking water).
• Leak path feature: connections accidentally left unpressed are detected during the leak test. Sanha states test pressures of 1 to 6.5 bar with water or 150 mbar to 3 bar with air for this.
• Compressed air according to Sanha with residual oil content up to 25 mg/m³.

• Determine the insertion depth before pressing, as specified by Sanha: push the pipe into the fitting until resistance is felt and mark the depth with a waterproof marker. Sanha does not recommend templates for NiroTherm, as the items can have different insertion depths.
• For dimensions above 54 mm, the tool specifications of the Sanha installation information apply.
• Insertion depth according to the Sanha installation information for 139.7 mm: 98 mm, for 168.3 mm: 120 mm.

Select the size. It states the diameters d1 x d2 in mm. The suffix a stands for the male plain end (outside dimension); Sanha designates the reducer as A x I.