John Hyndman
: Is there a building code restriction on use of regular schedule 40 PVC pipe for water at temperatures of roughly 180-190F? : : I have an application for nonpressurized sewer drain lines for commercial high-temp dishwashers in a public eating facility. A contractor has proposed to use ordinary Sched 40 PVC for this. The pipes are to be below a concrete floor in compacted soil, and I am concerned that if I approve this pipe I will be tearing up the floor in a few years to replace it. Im guessing that several hot/cold cycles a day will weaken or otherwise degrade the pipe in time. The longest pipe run will be on the order of 30 feet and I suppose that thermal expansion may be an issue as well. : : Is this situation covered in any building code? I should think that CPVC or some more hardy material would be a better choice, and am wondering whether any codes in fact require their use. : : Thank you for your help. 
agree with Wayne.1998 Ohio Plumbing Code and 1995 Uniform Plumbing Code 804.2(4101:2-63-04)Waste water temperature……..nor shall any water above 140 degrees farenheit be discharged into any part of a drainage system…..Pvc will work underground as long as the discharge water is tempered to 140 or below before it goes into the underground….pipewerks (licensed plumbing contractor)
