To reseal a PVC pipe, start by ensuring the area to be resealed is dry and free from debris. Cut away any old sealant using a utility knife. Clean the pipe and fitting with PVC cleaner to remove dirt and oils, enhancing adhesion. Apply a liberal amount of PVC primer around the area of the pipe and inside the fitting, preparing the PVC for sealing. Once the primer is dry (which usually takes a few minutes), apply PVC cement to both surfaces. Join the pipe and fitting together, twisting slightly to ensure an even distribution of the cement. Hold the pieces together for about 30 seconds to ensure they bond properly. Allow the cement to cure for at least 15 minutes before handling and 24 hours before testing with water. This process effectively reseals PVC, ensuring a watertight connection.

Bleach is commonly used for cleaning and disinfecting surfaces, including those in plumbing systems. When it comes to PVC (Polyvinyl Chloride) pipes, using bleach in moderate amounts and diluted forms generally does not cause significant damage. PVC pipes are designed to withstand various chemical interactions, making them resistant to the corrosive effects of bleach, especially in domestic concentrations. However, frequent use of highly concentrated bleach can lead to gradual wear and reduce the lifespan of PVC pipes by causing the plastic to become brittle over time. It is important to ensure that any use of bleach for cleaning purposes involves dilution as per manufacturer recommendations and is not a regular practice for pipe maintenance to avoid potential long-term damage.

To remove pine pitch sap from a polypropylene shirt, first place the garment in the freezer for a couple of hours. This step hardens the sap, making it easier to scrape off with a dull knife or spoon. Be gentle to avoid damaging the fabric. After removing as much sap as possible, apply a small amount of rubbing alcohol or a commercial stain remover designed for grease and oil on a clean cloth, and gently dab the stained area. Do not rub, as this may spread the sap deeper into the fabric. Once the sap has been treated, wash the shirt according to its care instructions, preferably separately to avoid contaminating other clothes. Avoid using heat (hot water or dryer) until the sap is completely gone, as heat can set the stain permanently.