Best Thing to Hold Two Plumbing Pipes Together

Have you ever stared at a leaking pipe under your sink, feeling that familiar surge of panic as water drips onto your cabinet floor? You are not alone; plumbing issues are among the most stressful home maintenance challenges, but fixing them doesn’t always require calling an expensive professional. Finding the best thing to hold two plumbing pipes together is the first step toward a dry, secure, and long-lasting repair that you can handle yourself with confidence.

Why Choosing the Right Connector Matters

Before we dive into specific products, it is crucial to understand that “holding pipes together” is not a one-size-fits-all scenario. The material of your pipes (Copper, PVC, PEX, or Galvanized Steel), the pressure of the water, and whether the line carries hot or cold water all dictate the correct solution. Using the wrong connector can lead to catastrophic leaks, mold growth, and structural damage.

According to industry standards, improper joint connections account for nearly 30% of residential plumbing failures. Therefore, selecting the right method is not just about convenience; it is about safety and longevity. In this guide, we will break down the most effective methods based on pipe type and situation, ensuring you make an informed decision.

Top Contenders: What Is the Best Thing to Hold Pipes Together?

When homeowners ask what the best thing to hold two plumbing pipes together is, the answer depends entirely on the context. Here are the top three categories of solutions used by professional plumbers today.

1. SharkBite Push-to-Connect Fittings (Best for DIY & Speed)

For most modern DIYers, push-to-connect fittings are widely considered the gold standard. These fittings use a stainless steel grab ring and an O-ring seal to create a watertight connection without soldering, glue, or crimping tools.

• How it works: You simply cut the pipe squarely, deburr the edges, mark the insertion depth, and push the pipe into the fitting until it clicks.
• Best for: Copper, CPVC, and PEX pipes.
• Pros:
  • No special tools required.
  • Can be installed in wet conditions.
  • Removable and reusable with a disconnect clip.
• Cons:
  • More expensive per unit than traditional fittings.
  • Bulkier profile may not fit in tight spaces.

2. PVC/CPVC Cement and Primer (Best for Plastic Drain Lines)

If you are dealing with white PVC or gray CPVC pipes typically found in drain, waste, and vent (DWV) systems, chemical welding is the superior method. This isn’t just “glue”; it is a solvent that melts the outer layer of the plastic, fusing the two pieces into a single homogeneous piece.

• How it works: Apply purple primer to clean the surface, then apply clear cement to both the pipe end and the inside of the fitting. Push them together with a quarter-turn twist and hold for 30 seconds.
• Best for: Non-pressure drain lines and vent stacks.
• Pros:
  • Creates the strongest possible bond for plastic.
  • Very low cost.
  • Highly resistant to leaks once cured.
• Cons:
  • Permanent; cannot be undone without cutting.
  • Requires ventilation due to strong fumes.
  • Not suitable for pressurized supply lines unless using specific CPVC rated for pressure.

3. ProPress or Crimp Rings (Best for Professional Durability)

While this requires specialized tools, it is worth mentioning because it represents the professional benchmark for copper and PEX piping. For copper, ProPress uses hydraulic pressure to deform a fitting around the pipe. For PEX, crimp rings compress a copper or stainless steel ring over a barbed insert.

• Best for: High-pressure supply lines where reliability is critical.
• Pros:
  • Extremely reliable and durable.
  • Faster than soldering for copper.
• Cons:
  • Requires expensive proprietary tools.
  • Generally not cost-effective for a single home repair.

Comparison Table: Quick Reference Guide

To help you decide quickly, here is a comparison of the most common methods for holding pipes together.

Step-by-Step: How to Use Push-to-Connect Fittings

Since push-to-connect fittings are often cited as the best thing to hold two plumbing pipes together for average homeowners, here is a detailed tutorial on how to install them correctly.

1. Turn Off the Water: Locate your main shut-off valve and turn off the water supply. Open a faucet to relieve pressure.
2. Cut the Pipe: Use a tubing cutter to make a clean, square cut. Avoid using a hacksaw if possible, as it can leave burrs that damage the O-ring. If you must use a saw, file the edges smooth.
3. Deburr and Clean: Use a deburring tool to remove any sharp edges from the inside and outside of the pipe. Wipe the pipe end with a clean cloth to remove dirt, grease, or moisture.
4. Mark Insertion Depth: Most fittings have a gauge or marking. Use a marker to draw a line on the pipe indicating how far it needs to go in. This ensures a full seal.
5. Insert the Pipe: Push the pipe straight into the fitting. Do not twist. Push firmly until you hit the stop. You should feel a distinct click or resistance.
6. Check the Gap: Ensure there is no gap between the pipe shoulder and the fitting body. If you see the mark you drew, pull it out and try again.
7. Test for Leaks: Turn the water back on slowly. Check the connection for any signs of dripping. If it leaks, ensure the pipe was fully inserted and the O-ring is not pinched.

Understanding Pipe Materials and Compatibility

It is vital to match the connector to the pipe material. Mixing incompatible materials can cause galvanic corrosion or chemical degradation. For a deeper understanding of material properties and safety standards, you can refer to the comprehensive overview on Plumbing provided by Wikipedia.

• Copper: Durable and resistant to bacteria, but requires soldering or push-fit connectors.
• PEX (Cross-linked Polyethylene): Flexible, freeze-resistant, and easy to install with crimp or push-fit fittings. It is becoming the standard in new US construction.
• PVC/CPVC: Rigid plastic used primarily for drains. CPVC can handle hot water, while standard PVC cannot.

Common Mistakes to Avoid

Even with the best tools, errors can happen. Here are the most frequent pitfalls:

• Not Cutting Squarely: An angled cut prevents the O-ring in push-fit connectors from sealing properly, leading to immediate leaks.
• Ignoring Deburring: Sharp edges on copper or PEX can slice the internal O-ring during insertion. Always deburr!
• Using Teflon Tape Incorrectly: Teflon tape is for threaded connections, not for slip-fit or push-fit connections. Adding tape to a push-fit inlet can actually prevent the seal from forming.
• Over-tightening Compression Nuts: If using compression fittings, tighten until snug, then give it a quarter turn with a wrench. Over-tightening can crack the nut or distort the ferrule.

FAQ Section

1. What is the strongest way to connect copper pipes?

Soldering (sweating) is traditionally considered the strongest and most permanent method for copper pipes. However, ProPress systems offer comparable strength and are faster, though they require expensive tools. For DIYers, high-quality push-to-connect fittings are rated for the same pressure as soldered joints (up to 200 PSI).

2. Can I use glue to hold two metal pipes together?

No. Standard plumbing cement or epoxy is not designed to hold pressurized metal pipes together. Metal pipes require mechanical connections such as threading, soldering, brazing, or compression fittings. Epoxy putty can be used as a temporary emergency patch for small holes, but it will not hold two separate pipes together under pressure.

3. Is it safe to use push-to-connect fittings behind walls?

Yes, most major brands of push-to-connect fittings (such as SharkBite) are certified for use behind walls and underground, provided they are installed according to the manufacturer’s instructions. However, some local building codes may have specific restrictions, so it is always wise to check with your local municipality.

4. What do I do if my pipes are different sizes?

You cannot directly connect two pipes of different diameters. You will need a reducing coupling or adapter. For example, if you are connecting a 1/2-inch pipe to a 3/4-inch pipe, you need a “1/2 x 3/4 reducer” fitting. Ensure the material of the reducer matches the pipe types involved.

5. How long does PVC cement take to dry?

While PVC cement sets quickly, it takes time to cure fully. You can usually handle the pipe after 15–30 minutes, but you should wait at least 2 hours before turning on water pressure. For best results, especially in humid or cold conditions, wait 24 hours before subjecting the joint to full pressure.

Conclusion

Finding the best thing to hold two plumbing pipes together ultimately comes down to matching the right tool to your specific pipe material and comfort level. For most homeowners tackling a quick repair, push-to-connect fittings offer the perfect balance of reliability, ease of use, and speed. For permanent installations on drain lines, PVC cement remains unbeatable.

Remember, a successful plumbing repair is about preparation: cut cleanly, deburr thoroughly, and follow the manufacturer’s instructions. By choosing the right connector, you save money, prevent water damage, and gain the satisfaction of a job well done.

Did you find this guide helpful? Share it with your friends on social media who might be facing their own plumbing dilemmas, and let us know in the comments which method worked best for you!