The day you leave
Close the main shutoff. This is the one item that matters; everything else is detail. With the main closed, a burst line, a failed supply hose or a stuck fill valve can only release what is in the pipes. If the valve will not close fully, have it replaced before you go, not after. Water heater: switch it off at the breaker (electric) or to VACATION/PILOT (gas). An electric heater left on with the water off can burn out an element if the tank drains through a leak. Open a faucet after closing the main to release pressure. Washing machine hoses: close both valves; a burst washer hose is the most common seasonal-home flood. Irrigation: leave it running if the landscaping needs it, on its own supply where possible, and have someone check the zones monthly.
The traps, the toilets, the disposal
Every drain trap will dry out over a summer, and the house will smell of sewer gas in November — the sewage-smell guide explains why. Pour a cup of mineral oil into each rarely used drain after the last use; it floats on the trap water and slows evaporation. Flush toilets and, with the main off, leave the tank empty rather than letting a silent flapper leak run. The EPA's leak figures — the average household's leaks waste over 9,300 gallons a year — are the summer bill a seasonal owner gets in one lump, and Manatee County bills sewer on water used, so it is charged twice. Run the disposal with cold water and a little dish soap, then leave it empty.
The day you come back
Open the main slowly and walk the house listening before you turn anything on: a hiss or running water means a leak the shutoff was holding back. Run every fixture for a minute to refill traps and flush the standing water; run the hot side until the rotten-egg smell that a warm idle tank grows — the hot-water smell guide — clears, and if it does not clear by the next day it is the anode rod. Restore the water heater last, after confirming the tank is full. Check under every sink and around the heater for water, and read the meter with everything off.
When to stop and call a licensed plumber
- The main shutoff will not close fully, or drips when operated — replace it before departure.
- The home has polybutylene or 1980s copper supply lines and has never had a shutdown check; the polybutylene guide explains why an empty house is the worst place for a failure.
- You want a monthly check while you are away, or a return visit before you arrive.
- On return: water anywhere it should not be, a meter that moves with everything off, or a hot-water smell that outlasts a day.
Rosco Plumbing's $149/year maintenance plan in Manatee County includes seasonal shutdown and return visits for homes left empty over the summer.
Call (941) 345-2464 or request a free estimate. Residential service in Manatee County; ranges are planning figures, not quotes.
Have Rosco Plumbing contact you about this
Describe what you are seeing and Ross will call or text back with what it sounds like and what the visit costs — no obligation.
What changes in Manatee County
Seasonal occupancy is the Manatee County pattern — Anna Maria Island, Longboat Key, Perico Bay Club, Heritage Harbour and every 55+ community empty out from May to November. In a condo or villa the association may require the main closed and a key on file, and a leak in an upper unit is a neighbour's ceiling; check the documents. A softener should be set to regenerate on demand, not on a timer, or it will run all summer for nobody. Rosco Plumbing keeps a shutdown-and-return list on file for maintenance-plan members and checks the home monthly if asked.