A whole-house sediment filter is one of the simpler treatment installs, but it still involves shutting off the main supply, cutting pipe, and pressurizing new connections. This guide walks through the sequence so you know what you are doing at each step, and it marks where a licensed plumber is the safer choice.
Before you start
Check your local plumbing code, and ask the local building office whether a permit or inspection applies to a change at the water entry. Read the manufacturer's instructions for the housing, the bypass, and the cartridge, and confirm you have the fittings they call for. Gather a pipe cutter, a deburring tool, a wrench set, the thread sealant or tape the manufacturer specifies, and a bucket and towels. If you have never soldered or worked with pressurized supply lines, this is the point to hire the job out.
Choose the location
Place the housing after the main shutoff and before the water heater and most fixtures, on a wall that can carry its weight and the bracket. Leave room below the housing to lower the bowl and reach the cartridge, usually more than you expect. Confirm the mounting surface is solid framing or secured backing board, not drywall alone.
Shut off, drain, and mount
Turn off the main supply and open a nearby faucet to relieve pressure and drain the line. Mount the bracket level and secure it into framing. Hang the housing and check that the flow arrow on the head points in the direction water travels, from the supply toward the house.
Install the bypass and plumb the connections
Set up the bypass valve so the filter can be isolated from the house without shutting off the whole supply. Cut pipe to length with square ends, deburr each cut, and fit the connections with the correct fittings. Connect the inlet from the main line and the outlet to the house side. Do not overtighten threaded fittings. Set the bypass as the manufacturer directs for initial start-up.
Install the cartridge and pressurize slowly
Lubricate the housing O-rings with the type of lubricant the manufacturer specifies, seat the cartridge, and close the housing. Open the main supply slowly. Open a faucet on the house side and let water run until the air clears and the sputtering stops, then close the faucet.
Leak check
Watch each joint, the housing seal, the bypass connections, and any drain or purge fitting for drips while the system is under full pressure. Dry the joints with a towel first so any new moisture is easy to see. Check again after an hour and again the next morning, because a slow weep can take time to show. Tighten a fitting only if the manufacturer says that joint can be tightened, and never overtighten.
When to stop and call a professional
Shut the main off and stop if a joint keeps dripping after you have tightened it correctly, if a fitting cracks or its threads will not seat, or if you cannot confirm the housing is holding pressure. Keep the manufacturer's paperwork and any inspection record with your home documents.