A dry P-trap is one with no water. The most common cause is suction created in the drain pipes by a blocked vent. You can ...

Article 501 provides the requirements for Class I locations, such as the refinery shown in Photo 1. In the May issue, we described the Division system outlined in the NEC, which further breaks down ...

Learn More › Mattresses are a major financial investment meant to last for years, so it just makes sense to insure such a ...

It stores the attachment ID (aid), thread/post IDs (tid, pid), author ID (uid), a download counter, and a tableid that identifies the data shard. Posted attachments: When a post is submitted, tableid ...