No, the kitchen drain pipe should not be clogged with pipe cleaner. Pipe cleaner is a product used to clean pipes and should not be left inside the drain as it can cause blockages. If the kitchen drain pipe is clogged, it is recommended to use a drain snake or call a professional plumber to clear the blockage. **

No, the pipe spindle has not gotten stuck in the pipe. **

The validity of a prayer at 11 o'clock depends on the specific prayer time for the particular religion or tradition. In Islam, for example, the 11 o'clock prayer would not be valid as the five daily prayers have specific times based on the position of the sun. However, in other religious traditions, such as Christianity, there may not be a specific requirement for prayer at 11 o'clock, so it could be considered valid. It's important to consult the specific guidelines and teachings of the religion in question to determine the validity of a prayer at 11 o'clock. **

Yes, the iPhone 11 can make international calls. You can dial international numbers by adding the country code before the phone number you wish to call. Additionally, you may need to have an international calling plan or pay additional fees depending on your carrier's policies. It's always a good idea to check with your carrier to understand any potential charges associated with making international calls. **

The oxidation number of an element in its elemental form is always 0. Since 11 is not an element but a number, it does not have an oxidation number. Oxidation numbers are assigned to individual atoms within a compound or ion to keep track of the distribution of electrons. **

PVC pipe can be installed as regular installation pipe in stairwells, but it is important to consider the specific requirements and regulations for the building and local codes. PVC pipe is lightweight, easy to install, and resistant to corrosion, making it a popular choice for plumbing applications. However, it is important to ensure that the PVC pipe meets the necessary fire safety standards for use in stairwells, as some building codes may require fire-resistant materials in these areas. Additionally, proper support and fastening of the PVC pipe is crucial to ensure its stability and safety in a stairwell installation. **

The size of the pipe clamp needed will depend on the diameter of the pipe. Measure the diameter of the pipe and then choose a pipe clamp that is slightly larger to ensure a secure fit. It's important to make sure the clamp is not too small or too large for the pipe to prevent any potential issues. If you're unsure, consult with a hardware store or a professional for guidance on selecting the right size of pipe clamp for your specific pipe. **

To connect a plastic pipe to a steel pipe, you can use a transition fitting specifically designed for this purpose. These fittings typically have a threaded end that can be screwed onto the steel pipe, and a solvent-weld or compression end that can be connected to the plastic pipe. Make sure to clean and prepare the ends of both pipes before connecting them, and use the appropriate sealant or adhesive to ensure a secure and leak-free connection. It's important to follow the manufacturer's instructions and local building codes when making this type of connection. **