style 400RG

Restrained steel coupling.
Manufactured in the USA.

USE  Couple and restrain plain end pipe, also available with a flanged end.
SIZES  12" - 48"
COMPATIBILITY  Ductile iron pipe.
WORKING PRESSURE  Up to 350 psi.

NSF61 certified on request.



BODY Made from ASTM A 36 steel.
RESTRAINT GLAND Ductile (nodular) iron, meeting or exceeding ASTM A 536, Grade 65-45-12. Romac’s RomaGrip is used in the 400RG see RomaGrip Submittal for technical information.
GASKETS Gaskets are made from rubber compounded for water and sewer service in accordance with ASTM D 2000 MBA810Z. Other compounds are available for petroleum, chemical, or high temperature service.
BOLTS AND NUTS ASTM A 193 Grade B7 all-thread-rod. Nuts per ASTM A 194 Grade 2H. Type 304 and 316 Stainless Steel bolt material optional.
COATINGS Shop coat applied to parts for corrosion protection in transit. Fusion bonded epoxy, RomaGrip Romabond polyester (12” – 24”), liquid epoxy and other coatings available on request.



Stainless steel restraint coupling

Wide range restraint coupling

Restraint system