Removing a glued PVC pipe can be challenging due to the strong adhesive properties of PVC cement. First, ensure you have safety equipment such as gloves and eye protection. One common method involves cutting the pipe as close to the joint as possible using a hacksaw or a PVC cutter. After cutting, you can use a deburring tool or a utility knife to remove any rough edges. If you need to salvage the fitting, heat can be applied carefully with a heat gun to soften the glue, allowing you to twist and pull the pipe out with pliers. However, extreme care must be taken not to damage the fitting or cause burns. Another option is using a specialized PVC pipe extractor tool, designed to grip and twist the pipe from the fitting. Remember, each method carries risk to the fitting and surrounding pipes, so evaluate if it’s more practical to replace the fitting entirely.

PVC pipe schedules refer to the thickness of the PVC pipe walls and thus its pressure capacity and durability. The most common schedules are Schedule 40 and Schedule 80. Schedule 40 is widely used for low-to-mid pressure residential and commercial plumbing; it's lighter and more affordable but less durable under pressure. Schedule 80 pipes have thicker walls, making them more suitable for higher pressure applications and industrial use. They are more costly but offer increased strength and longer service life. The choice between them depends on the specific needs of a project, considering factors such as pressure requirements, environmental conditions, and budget. There are also Schedule 120 pipes, which are even thicker and used in very high-pressure environments, but they are less common due to their specialized applications and higher costs.

Tangit PVC glue is a specialized adhesive designed for joining PVC pipes and fittings in piping systems. The drying time of Tangit PVC glue is typically 24 hours for it to fully cure and achieve maximum bond strength. However, it becomes touch dry and capable of handling light pressure in about 15 minutes to 2 hours, depending on environmental conditions such as temperature and humidity. For best results, it's recommended to apply the glue in a well-ventilated area at temperatures between 5°C and 35°C. Additionally, avoid applying pressure or testing the system for at least 12 hours to ensure a strong and reliable bond. Adhering to the manufacturer's guidelines is crucial for safety and the longevity of the piping system.