When to Replace Hoses, Water Heaters and Supply Lines
Every water component in your house has a service life. Almost nobody knows what those numbers are, which is why we stay busy.
Replace washing machine hoses every five to seven years regardless of appearance, and water heaters at ten to twelve years in Orange County water rather than running them to failure. Both are inexpensive planned jobs and both are, in our experience, the two most common causes of major residential water loss that a homeowner can simply remove from the table.
Almost every preventable water loss we attend comes down to a component that was left in place well past its service life — usually because nobody knew there was one.
Here are the numbers. Note that Orange County’s hard water shortens several of them meaningfully compared with national figures.
The replacement table
| Component | Replace at | Why it matters |
|---|---|---|
| Braided washing machine hoses | 5–7 years | Fails at the crimp at full pressure, usually when nobody is home |
| Rubber washing machine hoses | Replace now with braided | Shorter life and fails without warning |
| Refrigerator ice-maker line | 5–8 years | Slow weep behind an appliance nobody moves |
| Dishwasher supply connection | 8–10 years, or with the appliance | Leaks under the unit where it is invisible |
| Toilet and sink supply lines | 5–8 years | Cheap, quick, and a common overnight failure |
| Angle stops (shut-off valves) | 10–15 years, or when seized | A valve that will not close is useless in an emergency |
| Water heater (tank) | 10–12 years here | Hard water shortens life; failure means 40–80 gallons |
| Water heater anode rod | Inspect at 3–5 years | Sacrificial part; replacing it extends tank life |
| Toilet wax ring / seal | 20–30 years, or on any rocking | Leaks into the subfloor rather than onto the floor |
| Shower pan | 20–30 years | Failure drains into the ceiling below in two-storey homes |
| Pressure regulator | 10–15 years | A failed one lets pressure climb and accelerates every other failure |
| Copper supply system | 40–60 years in hard water | Pinholes come in series once the first appears |
| Sewer lateral (clay) | Inspect every 3–5 years after 40 | Root intrusion builds for years then backs up suddenly |
How to find the ages
- Water heater: the serial number on the data plate encodes the manufacture date, usually year and week in the first four characters.
- Braided hoses: often a date on the collar or crimp. If you cannot find one, assume older than you think.
- Appliances: the model and serial plate, usually inside a door or on the back.
- Plumbing system: the house build year is your default assumption unless there is evidence of a repipe — bright copper with modern fittings, or white PEX.
- Write what you find inside a kitchen cupboard door with the date. Your future self, or the next owner, will thank you.
The priority order if you are doing this once
- Washing machine hoses. Cheapest fix, biggest risk, especially with an upstairs laundry.
- Water heater age check, then a planned replacement with a pan piped to the exterior if it is over ten.
- Refrigerator ice-maker line — pull the fridge out and look.
- Angle stops throughout: turn each one off and on. Any that will not move should be replaced.
- Pressure test with a gauge on a hose bib. Above 80 psi, fit or replace the regulator.
- Sewer lateral camera inspection if the house is over forty and there are mature trees near the run.
The upstairs-laundry multiplier
One factor changes the priority of everything above: whether your laundry is upstairs over finished living space.
A hose failure at floor level in a garage spreads sideways on one plane. The same failure upstairs drains into the floor assembly and out through the ceiling below, affecting two levels, the insulation between, and often a wall cavity on the way.
That is why the same fifteen-dollar component produces a modest claim in one house and a very large one in another. If your laundry is upstairs — which describes most Mission Viejo two-storey homes and nearly all the 1990s and 2000s tracts in the surrounding cities — treat those hoses as the highest-priority maintenance item in the building.
Cheap hardware worth adding while you are there
- Leak sensors at the water heater, washing machine, dishwasher and under sinks. Inexpensive, and the ones that alert your phone are worth the small premium.
- A drain pan under the water heater, piped to the exterior.
- Quarter-turn ball valve angle stops when replacing seized ones — they are far more reliable than the older multi-turn type.
- An automatic shut-off valve on the main, if you travel, have an upstairs laundry over finished space, or own an older home with original copper. Some insurers offer premium credits for these.
Frequently asked
My hose looks fine. Do I still need to replace it?
Yes. The failure is at the crimped fitting, internally, and it gives no external warning until it goes. Age is the reliable indicator, not appearance.
Is it worth replacing a water heater that still works?
At ten to twelve years in this water, yes. A planned replacement is a scheduled cost. An unplanned one is the same cost plus a garage flood, contents damage, a wet shared wall and several days of drying.
How do I check my water pressure?
A gauge that screws onto a hose bib costs very little. Above about 80 psi is worth correcting — high pressure accelerates wear on every pipe, fitting, valve and appliance in the house, and a failed pressure regulator is a common and cheap-to-fix cause.
Expert insight
Age off the data plate, not by feel
Every water heater carries a manufacture date on its data plate, usually encoded in the serial number. Look it up rather than guessing — most people underestimate by years. In the tracts around Mission Viejo we routinely find third and fourth-generation tanks at fifteen years or more, sitting in attached garages with no drain pan, holding eighty gallons.
The bottom line
Hoses at five to seven years. Water heater at ten to twelve. Angle stops when they stop turning. Copper on notice after the first pinhole.
Write the dates inside a cupboard door. It is the least glamorous advice in this trade and the most effective.