Collar
1. In drains: The wider end of pipe into which another pipe fits.
2. In roofing: The timbers around a chimney breast within the roof structure. In this context, the collar is sometimes also referred to as 'Bridle' or 'Trimmer'.
1. In drains: The wider end of pipe into which another pipe fits.
2. In roofing: The timbers around a chimney breast within the roof structure. In this context, the collar is sometimes also referred to as 'Bridle' or 'Trimmer'.
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