Understanding trap-seal protection devices

Building codes are gradually changing across North America to allow waterless trap-seal protection devices (TSPDs) in lieu of trap primers. Depending on the jurisdiction, the products can be employed as substitutes in retrofit situations where trap primers have failed. What do design/construction professionals need to know?
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Ensuring a win in the lighting specification process

Design/construction professionals hope their project designs proceed without missteps or complications. Of course, that rarely happens. The lighting product specification and bidding process is complex, as it involves many interested parties, each with its own stake in which products are ultimately installed in the project.
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