Low Water Pressure in Spring? 5 Plumbing Problems NH Homeowners Shouldn’t Ignore

When spring finally shows up in New Hampshire, most homeowners are ready to open windows, clean up the yard, and put winter behind them. But for your plumbing system, spring can be one of the toughest times of year.

As frost leaves the ground, snowmelt saturates the soil, municipal crews begin hydrant flushing, and aging plumbing systems start showing their weak spots. If your sinks, showers, or hose bibs suddenly seem weaker than usual, low water pressure may be more than just an inconvenience. It could be your plumbing system warning you that something needs attention.

Here are five plumbing problems New Hampshire homeowners should not ignore in the spring.

1. Well System Sediment and Pressure Tank Problems

If your home runs on a private well, spring thaw can stir up more than mud. As the ground shifts and aquifers recharge, sediment, sand, iron, and manganese can get pulled into your well system. That material can clog filters, affect pump performance, and leave your home with weak or inconsistent water pressure.

In some cases, the problem is not the well itself. A failing pressure tank or clogged pressure switch can cause the pump to short-cycle or delay turning on when your home needs water. Homeowners may notice pressure dropping suddenly in the shower, pulsing water flow, or the pump kicking on and off too often.

What to watch for:

• Water pressure that surges, then drops
• Rust-colored water or metallic odors
• Pump cycling on and off too often
• Periods of low flow or no water at all

If you have a private well and spring pressure problems show up out of nowhere, it is smart to have the system inspected before a small issue turns into a pump or tank failure.

2. Municipal Hydrant Flushing Can Push Sediment Into Your Plumbing

For homes on city or town water, spring often means hydrant flushing season. This maintenance is important, but it can temporarily stir up iron, calcium, manganese, and other debris inside municipal water mains. That sediment can move into your home’s plumbing and clog aerators, fixture cartridges, shut-off valves, and appliance screens.

A lot of homeowners notice this right away as brown or yellow water, but the bigger issue can come later. Even after the water clears, sediment may still be sitting inside fixtures and supply lines, reducing flow for weeks.

Signs this may be your issue:

• Pressure dropped shortly after hydrant flushing in your neighborhood
• Water looked brown, yellow, or rusty
• One sink or shower is weak, but others seem normal
• Washing machine or dishwasher performance changed suddenly

After flushing, it is often best to run cold water first and clean faucet aerators and showerheads if pressure stays low.

3. A Failing Pressure-Reducing Valve (PRV)

If your whole house has low water pressure and you are connected to municipal water, the problem may be your pressure-reducing valve, also called a PRV. This valve controls the pressure coming into your home from the street. When it starts to fail, the result can be weak water flow throughout the house.

In many homes, a failing PRV causes showers, sinks, and outdoor spigots to all lose strength at the same time. In other cases, a bad PRV can fail in the opposite direction and let too much pressure through, which can damage appliances, hoses, and fixtures.

Common clues:

• Low pressure at every fixture
• Pressure that changes unpredictably
• Water hammer or banging pipes
• Appliance hose leaks or unusually forceful flow

A pressure gauge test can quickly confirm whether your home’s incoming pressure is too low, too high, or unstable. Safe residential pressure is typically in the 40 to 60 psi range.

4. Old Galvanized Pipes Restrict Water Flow

Many older New Hampshire homes still have galvanized steel piping. From the outside, those pipes may look fine. Inside, though, decades of rust and mineral buildup can narrow the pipe so badly that water can barely move through it.

This is one of the most common causes of chronic low water pressure in older homes. Homeowners often describe it the same way: when they first turn on the faucet, water comes out strong for a second, then quickly drops to a weak trickle. That usually means the system has pressure, but not enough pipe capacity to maintain flow.

Warning signs include:

• Weak water flow in an older home
• Rusty water first thing in the morning
• Major pressure drop when two fixtures run at once
• Pressure issues that keep getting worse over time

Unfortunately, this is not a problem that vinegar, drain cleaner, or a quick adjustment can fix. If galvanized piping is the cause, repiping is often the real long-term solution.

5. Clogged Aerators and Showerheads

Sometimes the plumbing system is fine and the restriction is right at the fixture. Spring sediment, hard water minerals, and loosened debris can collect in faucet aerators and showerheads, making one sink or one shower feel much weaker than the rest of the house.

This is especially common after hydrant flushing or in homes with hard water. The good news is that this is often the simplest issue to fix.

You may be dealing with a fixture clog if:

• Only one faucet or shower has low pressure
• Pressure is good everywhere else
• The issue came on suddenly
• You can see buildup or debris in the aerator

In many cases, removing the aerator or soaking the showerhead in white vinegar can restore normal flow. If that does not solve it, the blockage may be deeper in the fixture or supply line.

When Low Water Pressure Is More Than a Minor Annoyance

Low water pressure is easy to brush off, especially during spring when so many things are changing around your home. But weak flow can point to bigger issues like failing well equipment, sediment intrusion, old galvanized piping, or a bad pressure-reducing valve.

The sooner the cause is identified, the easier it is to protect your plumbing system and avoid bigger repairs later.

Need Help Finding the Cause?

If your home’s water pressure has dropped this spring, Al Terry Plumbing and Heating can help diagnose the problem and recommend the right fix. Whether it is a well system issue, a clogged fixture, aging pipes, or a whole-house pressure problem, our team is here to help New Hampshire homeowners get their water flowing properly again.

Call Al Terry Plumbing and Heating today to schedule an inspection.