A plumbing trap comprising: a body to be connected to an underside of a plumbing installation and aligned with an outlet from the plumbing installation, wherein the body includes: an inlet; an outlet; a first internal compartment; and a second internal compartment; wherein the first compartment is in direct fluid communication with the inlet and the second compartment is in direct fluid communication with the outlet; wherein the first internal compartment is wider than the second compartment; wherein the first compartment and second compartment are disposed side by side and both are visible and accessible via the inlet and wherein an internal ridge divides the first compartment from the second compartment; a seal tube insertable into the body via the inlet, wherein in use, a gap is created between a first end of the inserted seal tube and an inside bottom surface of the first compartment; wherein the combination of the inserted seal tube and the internal ridge, in use, create a water seal within the first compartment, wherein the internal ridge defines a maximum height of a water seal created within the first compartment; wherein the gap is provided by a step profile on the first end of the seal tube, wherein the step profile comprises one or more projections extending down from the first end, wherein upon insertion of the seal tube into the inlet the one or more projections are configured to contact with the inside bottom surface of the first compartment thereby defining the gap to create the water seal, in use; and a flange operable to connect the body relative to an outlet of a plumbing installation, wherein the flange is configured for disposal on an upper side of the plumbing installation and a fastener secures the flange to the body such that the plumbing installation is sandwiched between the flange and the body, characterized in that the inlet and flange each comprise at least two inwardly radially extending projections (34, 35) operable to facilitate connection of the trap to a plumbing installation, wherein the radially extending projections (34, 35) each comprise a hole (38, 39) therethrough, wherein the hole (38, 39) facilitates insertion of a fastener operable to secure the flange to the body and to the plumbing installation, wherein the seal tube comprises at least two longitudinal recesses having a profile corresponding to the at least two inwardly radially extending projections (34, 35), wherein the recesses facilitate alignment of the seal tube relative to the inlet and the body. an inlet; an outlet; a first internal compartment; and a second internal compartment; wherein the first compartment is in direct fluid communication with the inlet and the second compartment is in direct fluid communication with the outlet; wherein the first internal compartment is wider than the second compartment; wherein the first compartment and second compartment are disposed side by side and both are visible and accessible via the inlet and wherein an internal ridge divides the first compartment from the second compartment; a seal tube insertable into the body via the inlet, wherein in use, a gap is created between a first end of the inserted seal tube and an inside bottom surface of the first compartment; wherein the combination of the inserted seal tube and the internal ridge, in use, create a water seal within the first compartment, wherein the internal ridge defines a maximum height of a water seal created within the first compartment; wherein the gap is provided by a step profile on the first end of the seal tube, wherein the step profile comprises one or more projections extending down from the first end, wherein upon insertion of the seal tube into the inlet the one or more projections are configured to contact with the inside bottom surface of the first compartment thereby defining the gap to create the water seal, in use; and a flange operable to connect the body relative to an outlet of a plumbing installation, wherein the flange is configured for disposal on an upper side of the plumbing installation and a fastener secures the flange to the body such that the plumbing installation is sandwiched between the flange and the body, characterized in that the inlet and flange each comprise at least two inwardly radially extending projections (34, 35) operable to facilitate connection of the trap to a plumbing installation, wherein the radially extending projections (34, 35) each comprise a hole (38, 39) therethrough, wherein the hole (38, 39) facilitates insertion of a fastener operable to secure the flange to the body and to the plumbing installation, wherein the seal tube comprises at least two longitudinal recesses having a profile corresponding to the at least two inwardly radially extending projections (34, 35), wherein the recesses facilitate alignment of the seal tube relative to the inlet and the body.