Match the trap inlet to the waste outlet and the pipe connection to the drainage run. Basins commonly differ from sinks and baths, so measure both ends.
Drain Connections That Block Odours and Catch Debris
A waste trap holds a small water seal between a sanitary fitting and the drainage pipe, blocking smells from returning into the room. MacBlair stocks traps and waste connections for sinks, basins, baths and appliance layouts.
Choose by outlet size, available depth and the direction of the waste run. A shallow space below a bathroom basin may need a different shape from a kitchen sink cabinet. The stated seal depth must also match the application.
Compression waste joints seal with washers, not force. Cut the pipe square, remove burrs, place each washer in the correct direction and hand-tighten before checking for leaks. Keep cleaning access clear rather than boxing the trap behind an immovable panel.
Appliance spigots allow washing-machine or dishwasher hoses to discharge through some traps. Remove the factory blank before connection and secure the hose. For the wider drainage run, use compatible waste pipe and fittings, while WCs connect through dedicated soil pipework.
Waste Traps FAQ's
It is the retained depth of water that blocks drain gases. The required depth depends on the fitting and drainage arrangement.
The water seal may have dried out, been siphoned away or leaked, or debris may be decomposing in the trap. Clean it and investigate repeated seal loss.
Yes, if the trap has a proper appliance spigot. Remove any blanking plug, secure the hose and set the loop height to the appliance instructions.
They are normally hand-tightened onto correctly positioned washers. Excess force can distort plastic parts or seals and cause a leak.