TinnerFlow™3rd YearYELLOW · Check FirstAngled Riser Deep Collar
An angled riser puts weight and vibration on the joint. If collar engagement is short, replace the fitting or use an approved deeper-sleeve/companion connection.
A vertical or sloped spiral riser does not load a joint the same way a flat horizontal branch does. Gravity and vibration can pull the pipe out if the collar bite is too shallow.
Check the insertion depth, support path, and whether the riser is independently supported. The likely fix is a deep-collar fitting, approved sleeve/coupling, companion ring detail, and proper riser support so the joint is not carrying dead weight by itself.
Do not let a short slip collar carry the dead weight of an angled spiral riser.
A slipping riser joint can separate, crush fittings below, and create an overhead hazard.
Final direction belongs to the foreman, approved drawings/specs, manufacturer instructions, pressure/material schedule, employer policy, and AHJ/code requirements.