A seal assembly, comprising: a connector body having an open end configured for receiving a free end of a pipe, the connector body including a seal surface, wherein the connector body has a longitudinal axis (X-X), and the seal surface extends at an angle to the longitudinal axis (X-X); an adaptor for securing at the free end of the pipe; and a mechanical interlock arrangement configured for cooperation between the adaptor and the connector body, and driving the adaptor in the direction of the connector body, when the adaptor is secured at the free end of a pipe, for driving the free end of the pipe into sealing engagement with the seal surface, wherein the adaptor comprises a first ring, configured to be mounted around a circumference of the free end of a pipe, and a second ring configured to cooperate with the first ring in order to drive the first ring into engagement with an outer surface of the pipe; wherein the first ring has an angled outer surface defining a first taper, and the second ring has an angled inner surface defining a second taper complimentary to said first taper, and configured so that contact forces acting therebetween increase upon axial movement of the second ring relative to the first ring in the direction towards the connector body, for driving the first ring in a radial direction into contact with the outer surface of the pipe; wherein the connector body includes a first recess, and wherein a first end of the first ring is configured to nest within said recess when the second ring is driven in the direction of the connector body; optionally, wherein the seal surface is a metal seal surface. a connector body having an open end configured for receiving a free end of a pipe, the connector body including a seal surface, wherein the connector body has a longitudinal axis (X-X), and the seal surface extends at an angle to the longitudinal axis (X-X); an adaptor for securing at the free end of the pipe; and a mechanical interlock arrangement configured for cooperation between the adaptor and the connector body, and driving the adaptor in the direction of the connector body, when the adaptor is secured at the free end of a pipe, for driving the free end of the pipe into sealing engagement with the seal surface, wherein the adaptor comprises a first ring, configured to be mounted around a circumference of the free end of a pipe, and a second ring configured to cooperate with the first ring in order to drive the first ring into engagement with an outer surface of the pipe; wherein the first ring has an angled outer surface defining a first taper, and the second ring has an angled inner surface defining a second taper complimentary to said first taper, and configured so that contact forces acting therebetween increase upon axial movement of the second ring relative to the first ring in the direction towards the connector body, for driving the first ring in a radial direction into contact with the outer surface of the pipe; wherein the connector body includes a first recess, and wherein a first end of the first ring is configured to nest within said recess when the second ring is driven in the direction of the connector body; optionally, wherein the seal surface is a metal seal surface.