A newly replaced water line should outlast most of what else is buried on the property, and maintaining one takes very little. These are the tips that actually matter in the first year, and the handful that keep mattering after it.
Flush the line before you drink from it
After the tie-in, run the cold taps for several minutes, starting with the one closest to where the line enters the building and working outward. New pipe and the work of connecting it leave loose material in the system, and you want that out through the taps rather than caught in an aerator or a valve seat.
Expect cloudy water at first. That is usually air, and it clears as the line settles.
Clean the aerators once, a week later
Unscrew the aerator on each faucet, rinse out whatever has collected in the screen, and put it back. This is the single most common cause of someone thinking their brand new line has a pressure problem. It is almost always a clogged screen rather than the line.
Know where the shut-off is, before you need it
Find the main shut-off valve inside the building and make sure it turns. A valve that has not moved in years can seize, and the moment you discover that should not be the moment water is coming through a ceiling.
Turn it fully closed and fully open once, then leave it open. If it will not move, or it weeps when you work it, get it replaced while nothing is wrong.
Watch the bill, not the pipe
You cannot see a buried line, so the water bill is your early warning system. A bill that climbs with no change in use is the most reliable sign of a leak on a buried service, and it usually shows up before anything appears at the surface.
The other signs worth knowing: pressure that drops across the whole building and stays down, wet ground or unusually green grass between the street and the building, and the sound of running water with everything shut off.
Protect it from freezing and from roots
A properly installed service sits below the frost line, so freezing is normally a problem at the exposed end rather than in the buried run. Insulate any pipe in an unheated space, and on a long cold snap a slow trickle from one tap keeps water moving.
On the root side, think before planting. Trees sited over or near the run are the usual cause of trouble on older lines, and a tree planted today is a problem for whoever owns the property in twenty years.
Leave the paperwork somewhere you will find it
Keep the permit, the final inspection and any site sketch showing the route and depth. The next person to dig on that property, for a fence post, a patio or a pool, needs to know where the line runs. That paperwork also answers questions at sale.
Long Island Sewer and Water Main is family owned and has worked Long Island water lines since 1983, out of Sayville, across Nassau County, Suffolk County and the five boroughs, on call 24 hours a day.
Need this done on Long Island? Long Island Sewer and Water Main handles water line work across Nassau and Suffolk County. Call 631-407-2873 in Suffolk or 516-604-2651 in Nassau.