Your mother says there is no hot water. A plumber can come tomorrow, but the person on the phone wants permission to replace the water heater if it cannot be repaired. You are being asked to approve a piece of equipment you cannot see, inside a house you cannot reach.
Local option: New Plan Care gives families in the St. Louis area in-home help so a parent can stay home: companionship, help with bathing and dressing, meals, and overnight care. Call (314) 405-0887.
Do not try to become the plumber. Your job is to make the visit produce enough evidence for a clear decision, then make the installation end with a working faucet, a closed permit, and instructions someone local can follow.
1. Start with the failure, not the replacement
Ask your mother or a local person to check three ordinary things without touching the heater: Is hot water missing at every faucet? Is the water cold, briefly warm, or never hot? Is there water on the floor near the unit?
If water is spreading, have the local person call the utility or a qualified plumber and follow the instructions they give. Do not coach anyone through gas valves, electrical panels, relighting, draining, or opening the heater over video.
Give the plumber the symptoms, not your conclusion. Say, “There is no hot water at the kitchen and bathroom faucets, and there is no visible water on the floor,” rather than, “The tank is dead.” Ask the plumber to diagnose the failure before presenting replacement choices.
2. Get one complete set of photographs
Before the visit, ask for wide photographs of the heater and the room around it. Then ask for close photographs of the equipment label, the pipes at the top, the shutoff valves, the vent if it uses fuel, the electrical connection if it uses electricity, the floor beneath it, and the path from the heater to the nearest exterior door.
The equipment label can establish the existing fuel, storage capacity, model, and installation details. ENERGY STAR recommends using the capacity shown on the current unit as a starting point for a sizing conversation, while also considering changes in the household and its hot-water use. Source: ENERGY STAR, with the public references collected on the Sources page.
Measure nothing near a wet floor, hot pipe, electrical connection, or vent. If measurements are needed, put them in the installer’s written assignment: height, width, available clearance, doorway width, stair turns, and drain location.
3. Make the diagnosis a separate line
Ask the plumber to state what failed, whether it can be repaired, and what would remain old after that repair. A vague answer such as “not worth fixing” does not tell you whether the problem is the tank, a control, a heating element, a vent, a valve, or something outside the heater.
If replacement is recommended, ask for photographs that support the diagnosis. You are not asking for a remote inspection lesson. You are creating a record that another installer could understand if the first proposal is incomplete.
Also ask whether the proposed unit is a like-for-like replacement or a change in fuel, capacity, venting, electrical service, drainage, or operating method. A change may affect the work around the heater even when the new unit fits in the same corner.
4. Make every proposal describe the same finished job
Ask each installer to put the following in writing: the exact model, fuel type, storage capacity or flow rating, dimensions, removal of the old unit, delivery route, required pipe or vent changes, electrical work, shutoff work, drain pan or drain connection, permit responsibility, inspection responsibility, cleanup, and disposal.
Do not compare proposals until the omissions are filled. One may include permit handling and old-unit removal while another stops at placing the new heater in the room. Those are different jobs.
Ask why the proposed capacity fits the house as it is used now. Give the installer a simple use pattern: number of occupants, overlapping showers, laundry habits, dishwasher use, and any long periods when the house is empty. The U.S. Department of Energy distinguishes storage, instantaneous, and heat-pump water heaters because they heat and deliver water differently. The useful comparison is whether the proposed system fits the home and routine, not whether it has a more impressive label.
5. Put the St. Louis permit question on the installer
Ask, “Which permits and inspections apply at this exact address, who will obtain them, and what record will I receive when they are complete?” Do not accept “permits included” without the permit type and responsible party.
For a property in the City of St. Louis, the Building Division says plumbing permits are issued to plumbing contractors licensed and certified by the city, and its plumbing fee schedule identifies a water heater as a plumbing fixture. A St. Louis mailing address may instead fall under another municipality or unincorporated county, so the contractor should verify the authority for the actual property address.
Record the permit number when issued. Ask who schedules the inspection, whether someone must admit the inspector, what happens if a correction is required, and how you will receive proof that the permit is closed.
6. Plan the installation day as a handoff
Name one local adult who can admit the crew, keep your mother away from the work area, answer the installer’s call, and stay through the final demonstration. If nobody appropriate is available, ask the company whether it can provide arrival confirmation, photographs, and a live video handoff. The installer should not quietly turn your mother into the project manager.
Before work starts, ask for a photograph of the delivered model label and compare it with the written proposal. Ask the installer to contact you before making any change that alters the agreed model or scope.
Tell the local person what not to decide: no added work, model substitution, or change in fuel or venting without a call to you. Give the installer your number and a backup number in case you miss the first call.
7. Do not call the job complete when the tank is standing
Your completion list should follow the whole system. Ask the installer to confirm that the unit is filled, operating, and free of visible leaks at its connections; that the shutoff is labeled or clearly identified; that venting or electrical connections have been checked; and that required drainage has been addressed. Ask for final photographs from the same angles used before the work.
Then test hot water at a faucet your mother actually uses. Have the local person confirm that hot and cold controls still make sense, the water becomes hot after an ordinary wait, and no new dripping appears beneath the sink or near the heater. Do not ask your mother to judge the installation by touching pipes or standing beside the equipment.
Have the installer show the local person how to recognize normal operation, where the manufacturer instructions will be kept, whom to call for a service problem, and which maintenance tasks belong to the homeowner. If the unit has a filter, app, special operating mode, or unusual reset procedure, assign that task to a named person before the installer leaves.
8. Close the folder, then separate tonight from the doctor
Save one folder with the diagnosis, proposals, approved scope, model and serial numbers, permit number, inspection record, final photographs, manufacturer instructions, installer contact, and any written labor or equipment warranty. Add one plain sentence naming who handles the next service call. This is the part that helps when you are back at the airport and your mother says the water feels different.
What to do tonight: Establish whether every faucet lacks hot water, check from a safe distance for visible leaking, arrange one local adult for access, and request the full photograph set. Send the plumber a written instruction to diagnose first and obtain your approval before replacement.
What to leave with the doctor: The heater choice, permit, and installation belong with the contractor. If your parent has a care routine that specifically depends on hot water, tell the doctor’s office only how long hot water may be unavailable and ask whether that routine needs a temporary adjustment. Leave the plumbing diagnosis out of the medical call.