A rented or leased water unit can look affordable on the monthly line and expensive over the years that follow. The contract, not the sales conversation, decides what you actually pay, what you can change, and what happens when you leave. Read the ending terms before you read the price.

Find the length and the exit

Look for the term length in the agreement and whether it renews on its own. Find the fee charged if you end early, and whether that fee drops over time. Note the notice period needed to cancel, and whether notice must be in writing and sent in a particular way.

Who owns the unit at the end

Check whether the equipment stays the provider's property. If there is a buyout option, find out its price, when it is offered, and whether the price changes over the life of the contract. If the agreement ends with removal, find out who schedules it, who pays for the trip, and whether the plumbing connections and shutoff valves are restored to their original state. Ask what happens to the old unit and whether the removal crew disconnects the drain line.

What the monthly fee covers

Ask which parts and services are included. Does the fee cover filter media, resin replacement, service calls, travel, parts, and water testing? Find out whether any item is billed separately, such as a visit after a complaint. Ask for a sample invoice, not only the price sheet.

Who services it and what happens if they stop

Find out who is responsible for repairs and how quickly a service call happens. Confirm whether the provider uses its own technicians or subcontractors. Ask what happens if the company is sold, closes, or stops serving your area, and whether the contract lets you transfer it or end it without a penalty.

If you sell the house

A rented unit usually does not pass to a buyer the way owned equipment does. Read what the contract says about selling the home, and plan the handover with the provider in writing. Ask whether a buyer can take over the agreement, and what that would require.

Compare two offers the same way

Lay out each agreement side by side: monthly fee, term, early exit fee, buyout, removal, service response time, and anything billed extra. A cheaper monthly fee paired with a longer term or a larger exit fee may cost more over the life of the contract. Have someone you trust, who is comfortable reading contracts, go through the wording with you. If a provider points to a rating or grade for its product, check what that grade measures on the How Grades Work page before you rely on it.