Quck answer
To connect galvanized pipe to PVC pipe, follow these steps:
1. Cut the galvanized pipe and PVC pipe to the desired length using a pipe cutter or hacksaw.
2. Clean the ends of the pipes with a cleaning solution to remove any dirt or debris.
3. Apply PVC primer to the end of the PVC pipe and the inside of the PVC fitting.
4. Apply PVC cement to the primed areas and quickly push the PVC pipe into the fitting, ensuring a tight connection.
5. Use a wrench to tighten the galvanized pipe onto the threaded fitting, making sure it is secure.
6. Test the connection for any leaks by running water through the pipes.
Remember to always follow the manufacturer’s instructions and wear protective gear when working with pipes and fittings.
In the past, galvanized pipes were commonly used in residential plumbing systems. However, pipes made from different materials such as copper and plastic are now more popular. While white PVC pipes are easy to find and work with in outdoor plumbing systems, they are not suitable for hot water. Therefore, when replacing galvanized pipes indoors, the plumbing code requires the use of CPVC pipes instead of PVC pipes.
Standard CPVC pipes are cream-colored, while heavy-duty Schedule-80 pipes are gray. The installation process for PVC and CPVC pipes is the same, but they should not be mixed together. When replacing old galvanized pipes, it is recommended to remove and replace as many of the old pipes as possible. Galvanized pipes tend to corrode over time, reducing water flow and making them prone to leaks.
Upgrading Water Pipes
The most suitable location to transition to new pipes is at a female threaded connection, such as a tee, elbow, or coupling. This allows you to connect a PVC or CPVC male slip adapter, which has male threads on one end and a smooth socket on the other. It is safer to use a male plastic slip adapter instead of a female one, as the latter may split when tightened onto metal. Even if it doesn’t happen immediately, it could lead to a leak and cause problems later on. If you need to transition from a male threaded pipe, use a galvanized coupling to create a female connection before transitioning to plastic.
To make the transition, start by cleaning the galvanized female threads using a small wire brush to remove any old thread sealer or debris. Wrap plumbing tape clockwise around the male threads of the plastic slip adapter about three or four times. Hand tighten the adapter into the socket, then use slip-lock pliers to turn it two or three complete rotations. Be careful not to overtighten and risk cracking the plastic. Once the adapter is secure, glue a pipe into the other end, and you’re ready to continue with the rest of your PVC or CPVC pipe system.
Connecting Galvanized and PVC Drain Pipes
Since drain pipes are not under pressure, the concern for leaks is reduced. You can make a transition in the same way as with water pipes, but it is not necessary. If you need to transition in the middle of a pipe, you can do so without re-threading the pipe. Simply use a hacksaw to make a straight cut on the pipe, then attach a Fernco flexible connector with the appropriate diameter over the end and tighten it. Fernco connectors resemble regular pipe couplings but are made of rubber and have a pipe clamp on each end that can be tightened with a screwdriver or socket wrench. Insert the PVC pipe into the other end, tighten the clamp, and you’re finished.
Since the surface of old galvanized pipes may have irregularities due to corrosion, it is advisable to apply a silicone-based sealer on the pipe before attaching the fitting. However, the PVC pipe has a smooth surface, and the rubber of the Fernco connector alone can create a good seal, eliminating the need for additional sealer.
