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How do you install a lug butterfly valve?


If you’re getting a new pipe installed, you might have noticed there are different types of valves available. Some of them are much easier to install than others. In this article, we’ll walk you through the process of installing a lug butterfly valve—a type that’s designed to be easy and quick.

1. Disconnect the power.

In order for you to safely install a lug butterfly valve, you will need to disconnect the power. This is because the lug butterfly valve is water and electrical hazard. To be safe, you should completely shut down any power to the valve and make sure all water connections are unplugged from their respective valves.

2. Unscrew the lug valve from the pipe.

You can use various types of wrenches to unscrew the lug valve from the pipe. The most common options are:

①A wrench with a single handle that turns in either direction

②A wrench with two handles, one on each end (this is sometimes called a “combination” or “offset” wrench)

③A crescent wrench, which has the same shape as a pipe wrench except it’s small and can fit into tight spaces

You may also be able to use ratcheting wrenches, which have an adjustable head so you don’t have to keep turning them to loosen or tighten screws. These are particularly useful when working with big bolts or nuts because they make it easier not only to get enough leverage but also not risk stripping out your work.

lug butterfly valve

3. Remove any dirt around the pipe.

①Use a brush or rag to remove dirt from around the pipe.

②Use a pipe cleaner to remove any excess grime and debris from within the fitting.

③You can also use a snake tool, which is simply an auger with a small handle attached at one end, in order to clean out the interior of your lug butterfly valve fitting. The auger will allow you to reach inside and pull out any debris that may be stuck there without having to shut down your entire system and disassemble everything first (which would take hours).

④When all else fails, try using a wrench!

4. Put plumbers putty around the pipe.

Before you install your new lug butterfly valve, you will need to make sure that the area around where the pipe is leaking is sealed. You can use plumbers putty or another type of sealant to secure it in place. Plumbers putty is available at any store and can be used to glue pieces of metal together as well as seal leaks in plumbing fixtures and pipes.

Plumbers’ putty has a consistency similar to modeling clay, so it’s easy to work with when sealing joints or openings in pipes or fixtures. The main ingredients are lead, zinc, petroleum products (the kind found in motor oil), and other fillers like clay; these chemicals combine for an effective substance that lasts for years without drying out or hardening into an unusable state if exposed to air for too long.

The best part about using plumbers’ putty? It’s flexible enough not only for repairs on old piping systems but also for newer ones! This means no matter what kind of pipe installation you have going on right now—from old cast iron technology from 100 years ago up until today—there will be plenty more uses down the line when things start breaking down again someday soon.

lug butterfly valve

5. Insert and tighten the lug butterfly valve onto the pipe.

Once you have tightened the lug butterfly valve onto the pipe with a wrench, you should check for leaks around the pipe. If there are any leaks, tighten or replace the lug butterfly valve. If tightening does not stop the leak, then replace it with a new one.

To begin installing this type of valve: Make sure that all parts are clean and free from dirt or grease before beginning installation. Remove any caulk or old sealant from both ends of the pipe using sandpaper or a wire brush where necessary; wipe away excess residue with acetone or mineral spirits (do not use gasoline). Clean off any oil film from inside threads if necessary by wiping them down with solvent; let dry completely before proceeding – DO NOT use heat! Install rubber gasket into a groove in body shell; insert body shell over end fittings until flange seats tightly against shoulder at end of threads on male fitting – DO NOT OVERTIGHTEN!

6. Align the disc and stem of the valve.

Before you tighten the valve, make sure that the disc and stem are aligned. If they’re not, you’ll risk damaging the butterfly valve and it will not function properly.

To align the disc and stem:

①Hold your wrench with a handle on both sides (if your tool has no handles, hold it firmly by placing one hand over the other).

②Place one of the handles on top of one side of either hole in which you inserted screws during installation (depending on whether or not you have a double-ended wrench). Slide this end around so that it’s now on the bottom facing outward at an angle toward where these holes were drilled into the wall/floor/ceiling (or side/side).

③Place the other side of the same handle against the opposite side of the wall/floor/ceiling (or side/side) so that both ends meet up with each other inside their respective holes.

④Screw down tightly with a wrench until fully tightened in place. Use a pipe wrench and torque wrench to ensure the lug valve is tightened properly. Do not over-tighten the lug valve.

⑤Check local codes for installation requirements before installing your new valve. You may need to use the correct gauge of the lug valve for your project, check local codes and standards, or use other approved sealants during installation.

7. Turn on and test the flow of water through the pipe.

①Turn the water back on and check for leaks.

②Check to make sure that the flow of water is proper.

③Check that the temperature of the water flowing through the pipe is within acceptable levels (it should be close to room temperature). If it isn’t, call a plumber or find out what might be causing this issue so you can fix it yourself in future projects.

④Make sure that there are no leaks in any part of your piping system and check for signs of corrosion or wear on any parts used during installation like o-rings and packing washers. If there are signs of damage or wear, replace those parts before continuing with project completion!

In addition to checking these things, you will also want to double-check whether everything else has been set up properly: did you align your disc correctly? Is it flush against both sides without any gaps between them? Does everything look like it should when installed correctly? Are all pieces fitting together as planned?


This installation process is easy, but you have to follow all steps carefully. If you have a purchase plan for lug butterfly valves, welcome to find Wesdom Valves.


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