Most homeowners compare new equipment and forget that something has to come out first. If you already have a softener, filter housing, or other treatment unit in place, the removal is part of the job, and it can change what the finished install looks like. Settle these questions before you commit so the answers are not improvised on installation day.
Is removal in the scope?
Ask whether the written proposal includes taking out the old unit or only installing the new one. If removal is included, ask whether it covers disconnecting the old equipment, capping or re-plumbing the lines, and cleaning up the spot where it sat. If removal is not included, ask what it would cost to add later, and whether the new install is designed to work alongside the old unit in the meantime.
What stays behind in the pipes?
Ask what happens to the old bypass valve, the old fittings, and any stub of pipe left after the unit is disconnected. Ask whether the old connection points will be sealed properly so they do not leak after the water is turned back on. Ask whether the installer intends to reuse any of the old fittings, and if so, how they will confirm those fittings are sound.
Who hauls the old unit away?
Ask who transports the old equipment and where it goes. Some older units contain salt, resin, or media that cannot simply be left at the curb, so ask what the company does with these materials and whether they charge for disposal. Get the answer on paper if disposal is part of your expectation.
Protect the floor and the room
If the old unit sits in a basement, garage, or finished room, ask how the removal will protect the floor from water and salt, how the work area will be cleaned, and who is responsible if a fitting or floor surface is damaged during the removal. Ask to see photos or a description of how they handled a similar removal in a home like yours.
Check the paperwork on the old equipment
If your existing unit is still under a warranty or service agreement, ask how removing it affects that coverage before anything is disconnected. The company removing your unit should be able to tell you that plainly, and you should confirm the answer before work starts. If you are still comparing companies, the Award Methodology page explains how the awards are judged, and the Best Water Companies STL award winners page lists the companies recognized for greater St. Louis.