How to Replace a Trench Drain Grate

The trench is usually covered with a trench drain grate to protect it from getting corked with leaves, branches or other debris. The grate also makes it easily to walk across it. The drain itself has the role of protecting your garden or house from water coming from surface or subsurface. Here is to install a trench drain gate in order to keep the drain functioning as it should.

Tools and Materials

  • Measuring tape
  • Lockdown plates
  • Lockdown bars
  • Screws
  • Screwdriver
  • Garden hose

Step 1 – Measure the Trench Drain

Use a measuring tape and note the width and length of the trench drain. Take into consideration that the grate will have to sit on the edges of the trench. Use the dimensions of the old grate as a guide.

Step 2 – Choose the Trench Grate

Go to a specialized store and choose the trench grates. For use in your yard and near your house—areas with relatively low traffic, you can choose almost any material, from plastic to galvanized steel. The types of holes in the grate are also important. The larger the holes and more open area, the more efficient is the trench drain because the debris will flush easier through the system. Also, smaller holes will need more frequent cleaning.

Step 3 – Clean the Trench

Use your hand or a screwdriver to remove the lockdown screws. Turn out the lockdown plate and the lockdown bars to remove the grate. Lift the old grates and put them aside. Use a garden hose connected to a water supply and clean the trench with a strong water jet. If necessary, use a mop to sweep away all the dirt. Cleaning the trench might be a lot of work, but it is necessary to ensure it remains functioning. Also, check if there are any clogs on the way. Keep in mind that those points on the trench might be lead to blockage. Check them first if you have problems with the draining system.

Step 4 – Place the New Grates over the Trench

Insert one of the screws that came with the grates through the top side of the lockdown plate that is welded to the underside of the grating and into the lockdown bar. Make one or two turns. Repeat this step for each lockdown plate until each of them has been attached to the grate. Turn the lockdown bars parallel with the trench drain. Place the grate back into the trench. Make sure it is level and properly aligned. Use your hand to tighten the lockdown screws until the grate is safely anchored. Check if the lockdown bars have fully engaged the frame.