Hurricane-season plumbing prep

The short answer

Atlantic hurricane season runs June 1 to November 30, and Jacksonville's low-lying, flood-prone neighborhoods take the plumbing brunt: storm water overwhelms sewer lines and pushes sewage back up house drains, floodwater damages ground-level water heaters, and surge stresses aging laterals. The five things that matter most: know your main shut-off, drain and cap outdoor fixtures, anchor or elevate the water heater, test the sump pump, and — if you're in a flood zone — put a backflow preventer on the sewer line. Do the big upgrades before the season, not the day before landfall.

Why Jacksonville plumbing is hurricane-vulnerable

Jacksonville sits low and wet — river, marsh, and a high water table — so heavy rain and storm surge saturate the ground and force water into every crack in an aging sewer lateral. That's what turns a storm into a sewage backup in the lowest drain of the house.

Homes near the St. Johns, in the Beaches, and in older neighborhoods with cast-iron or clay laterals see it worst. If your drains already gurgle or back up in ordinary heavy rain, that's the warning shot — the line needs attention before a named storm arrives. (See why storm-season backups happen.)

Before the season: the permanent upgrades

These are the fixes to make now, on a calm day — not while a cone is pointed at Duval County:

• Backflow preventer / check valve on the main sewer line. It closes under reverse flow, stopping sewage from surging up through floor drains and toilets. The single best protection for a flood-zone home — pair it with your backflow testing.
• Sump pump with battery backup. Test it before season, and add a battery or generator backup — the pump matters most exactly when the power is out.
• Anchor or elevate the water heater. A tank sitting in floodwater can shift, leak, or break a gas connection. Have it strapped and, in a flood zone, raised on a platform.
• Camera the sewer lateral if you've had backups. Fixing a cracked, root-invaded line before season beats a emergency sewer repair mid-storm.

Before a storm: the day-before checklist

Once a storm is in the forecast, run this quick list:

1. Locate your main water shut-off and make sure it turns — you want to kill the supply fast if a pipe breaks.
2. Turn off and drain outdoor fixtures — hose bibs, spigots, irrigation valves, and pool fills — and cap them so debris can't jam them.
3. Clear gutters and yard drains so water moves away from the house, not into it.
4. Fill a tub and jugs for non-potable water in case service is disrupted.
5. If you have a backflow preventer, confirm it's clear; if you don't and you're flood-prone, minimize drain use during the surge.

After the storm

Once it passes, don't rush the plumbing. If the sewer backed up, stop using drains until the line is checked. Smell for gas near the water heater before relighting anything. And watch for new slab-leak signs — shifting saturated ground can crack a supply line under the slab.

A sewage backup, a broken line, or no water after a storm is an emergency — see our 24/7 emergency plumber page. Call rather than wade into contaminated water.

How 904 Plumbers helps

Whether it's a pre-season backflow preventer and sump-pump check or a post-storm sewer backup, 904 Plumbers connects you with a licensed, insured local plumber — quoted upfront, 24/7 for emergencies. 904 Plumbers is a referral and dispatch service; the work is performed by independent, licensed Florida contractors.