This appraisal is for ductile iron off-take clamps for DIOD pipes in sizes DN 100 and DN 150 with DN 80 and DN 100 flanged off-takes, manufactured in compliance with AS 4181:2013 Repair and offtake clamps for water industry purposes.

The fittings, branded as Uniclamp, consist of two polymeric coated ductile iron halves bolted together with Grade 316 stainless steel fasteners.

The circumferential elastomeric seal is manufactured from Nitrile rubber.

The clamps are full circle design and designated as Type R and Type F and are suitable for installation on ductile iron, cast iron, AC, GRP, Series 2 PVC-U, PVC-M or PVC-O pipes.

The clamps are rated as PN16 and the flanges comply with AS/NZS 4087 PN 16 Figure B5.


Product categoryOfftake clamps
PA NumberPA 2025
Report holderDerwent Industries Pty Ltd
StandardAS 4181:2013 Repair and offtake clamps for water industry purposes
Publication date
Expiry date

Download appraisal

Title Format Download
PA 2025 - Derwent - DI Uniclamp Flanged Offtake Clamps for DIOD Pipes-Final-1.pdf PDF