Delivering Fluid Sealing Solutions Since 1972

WRc / WRAS O Rings

WRc / WRAS O Rings for the Water and Gas industry

M Barnwell Services, the UK’s leading supplier of Fluid Sealing Solutions offers a comprehensive range of WRc / WRAS O Rings that are suitable for use with potable water and have excellent resistance to weathering, ozone, ageing, and chemicals.

Our WRc / WRAS O Rings are approved rubber seals that can contain impressions on both sides as standard but can also be supplied with a plate finish upon request.

We have the very highest reputation for supplying quality products, unrivaled service, and technical support. All our Water and Gas compounds are compliant with WRC / WRAS (BS6920), NSF, DGS / ACS, EN681-1, EN682, KTW / DVGW / W534 / W270, KIWA.

Available from stock is the BS1806 Imperial Range of O Rings (BS005 to BS245). The material is a Black Nitrile (NBR) 70 Shore. Our compound reference is MBMS0003. This compound meets water accreditations WRc, KTW, ACS, and NSF61.

If you would like more information about our range of WRc / WRAS O Rings, download our catalogue, or contact a member of the team.



WRc / WRAS approved O-Rings sizes available from microminiature.

We have a large selection of approved WRc WRAS O-Rings in stock at our branches in Birmingham, Scotland, Dartford, Bristol, and Manchester. However (depending on conditions) if we do not have your item in stock there is a short lead time in supplying your request. Contact the team today for more information.


Nitrile (NBR), Viton® (FKM/FPM), Ethylene Propylene Diene Rubber (EPDM), Silicone (MVQ)

Temperature range circa -15°C to 100°C

WRc / WRAS approved O-Ring SHORE HARDNESS – 70 to 75 Shore.

Our WRc WRASO-Rings are available in a wide range of colours including white, light grey, dark grey, red, blue, yellow, light green, dark green. Others available upon request.


WRc / WRAS as standard but we can also have compounds that meet other Water & Gas industry specifications such as ACS, DVGW, EN 549, EN 681-1, KIWA, KTW, and NSF 61.


O-Ring Kits - For O-Ring Kits, O-Ring Splicing Kits, O-Ring Gauges, and Lube. For more information on these and our extensive range of other kits, please visit our kits Section.


Chemical Processing, Semiconductor Wafer Fabrication, Pharmaceutical, Oil & Gas Recovery and Aerospace

Associated Products

O Ring Ancillary products - we also stock Quad Rings / Nu-lip Rings, O Ring Cord (extruded), Sheeting and Tubing, Anti-extrusion Rings, Adhesives and our new O Ring material tester.


For detailed technical information about our WRc / WRAS approved O Rings download the brochure below, visit our Technical Support page or contact a member of the team today.