How to Install a PVC Check Valve

What You'll Need
Tape measure
PVC cutter
PVC pipe

A PVC check valve has a variety of roles but is mostly used to regulate and control the flow of fluids, especially into pumps. A check valve is a single way valve which only allows water to flow in a certain direction. Once the water has gone through the valve, it cannot go back the way it came. During installation, you are required to check the valve arrow and confirm the expected direction of the flow. PVC check valves can be used in ponds and in irrigation where you need to constantly control the flow of water.

Step 1 – Take Measurements and Cut PVC pipe

If you want your work to be free of mistakes and errors, always make the necessary measurements before cutting. Using a tape measure, measure out 4 inches from one end of the pipe and then using these marks as a guide, proceed to make a clean cut with the PVC cutter. 

Step 2 – Clean the Pipe

After making a cut, there are usually burrs that are left at both ends of the PVC pipe. These burrs can later cause blockages in the pipes. In order to prevent this, it is advisable to remove these burrs. You can use a pocket knife or sandpaper to do this. To ensure maximum cleaning, take a clean cloth and gently wipe off the reminder of the burrs. The cloth will get rid of any traces of dirt or unnoticeable burrs.

Step 3 – Apply Primer

Primer is a water-like solution which is applied on joining pipes to soften them and ease the installation process. The pipe hardens back to normal after a few minutes. The primer comes with a soft brush. Use this brush to apply primer to the interior areas of the PVC pipe. Take note of the areas you are applying the primer. Then use the brush to apply the primer on the outside parts of the PVC pipe. 

Step 4 – Glue

Take the PVC pipe ends that you have applied primer to and skillfully apply a sufficient amount of glue around the insides. Place the glued PVC pipe into the check valve and turn it around at an angle so that the glue can spread evenly. Hold the 2 pipes together for about 10 minutes. This will enable the pipes to form a strong bond.

Step 5 – Join the Valves

Using the PVC primer, soften the interior parts of the inlet side of the check valve. Then apply glue, join the valves and hold together for around 5-10 minutes. Run some water through the pipes to make sure that the PVC check valves are working right. 

Extra Tip 

  • If installed properly, the PVC check valves will not require regular repairs. 
  • Polyurethane glue can be used because it gives you time to make adjustments, if need be, before drying. Remember to use the right kind of solvent for the right PVC pipe.
  • It is always wise to put on protective gear, respirator or a dust mask. Since you will be dealing with chemicals and strong scented solutions, be careful not to inhale a dangerous amount of it.