Low Water Pressure in Indiana Homes: Causes and Fixes

A weak shower or a faucet that takes forever to fill a pot gets old fast. The good news is that low water pressure almost always has a findable cause, and where the problem shows up tells you a lot about what it is. Here's how to narrow it down.

Pressure or flow?

Plumbers separate these two, and it helps if you do too. Pressure is how hard the water is pushing in the pipes. Flow is how much water actually comes out. A house can have plenty of pressure at the meter and still have poor flow at the shower because something is in the way.

In Central Indiana, restricted flow is the more common problem, and hard water is usually part of the story.

Start with where it's happening

Only one faucet or shower

This is the easiest case. Minerals from our hard water collect in faucet aerators and showerhead screens until only a trickle gets through.

• Unscrew the aerator, rinse out the grit and soak it in vinegar if it's crusty.

• Soak or replace a scaled-up showerhead.

• If that doesn't help, the faucet cartridge or the stop valve under the sink may be worn or partly closed.

Only on the hot side

If cold water runs strong but hot is weak, look at the water heater. Sediment builds up in tank heaters here, and scale can also collect in the fittings on top of the tank or in the heat exchanger of a tankless unit. A broken dip tube can send plastic bits into the lines and clog aerators. Flushing helps in some cases, and your plumber can tell you whether the heater is worth servicing.

The whole house

When every fixture is weak, the cause is usually upstream of everything.

• A main shutoff that isn't fully open, often after someone turned it off for a repair.

• A failing pressure regulator. Many homes have one where the water line enters, and they wear out with age.

• Old galvanized pipe. In older North Indianapolis homes, galvanized steel rusts and scales on the inside until the opening is a fraction of its original size.

• A hidden leak. Water escaping somewhere lowers what reaches your fixtures.

• Work on the city main. If neighbors notice the same thing, it may be temporary and outside your home.

Homes on well water

Outside the city lines in Hamilton, Boone and Hendricks counties, many homes run on a well, and pressure depends on the pump, the pressure tank and the pressure switch working together. Pressure that surges and drops, or a pump that clicks on and off constantly, often points to a waterlogged pressure tank or a switch that needs adjustment. Weak pressure along with sputtering or cloudy water can mean the pump itself is struggling. Our well pump service covers all three pieces.

Quick checks before you call

• Is it one fixture, hot only, or the whole house?

• Did it drop suddenly or fade over months?

• Is the main shutoff valve fully open?

• Are neighbors having the same problem?

• Do you see damp spots, hear running water with everything off, or notice a higher water bill?

Skip adjusting the pressure regulator yourself, and don't open pipe connections. Those are easy ways to create a leak.

How we fix it

Your plumber tests the pressure, checks the likely spots and explains what they found. Then you get your options and a price before any work starts. Depending on the cause, that might mean a new aerator or cartridge, a valve or regulator replacement, water heater service, a leak repair, or replacing a section of old galvanized pipe. When most of a house is still on galvanized, whole-home repiping may be the lasting fix, and we'll explain why if that's the case.

If hard water caused the problem, a softener keeps it from coming back.

When to call us

Call right away if pressure dropped suddenly, both hot and cold are affected, or you suspect a leak. Slow, gradual loss can be scheduled. Our leak detection and repair team can find a hidden leak without guesswork.

FAQ

Why is my water pressure low only on hot water?

The problem is usually at the water heater or the hot lines leaving it. Sediment, scaled fittings or a broken dip tube are common causes in hard-water areas like ours.

Can a booster pump fix low pressure?

Sometimes, but a booster won't clear a clogged pipe or a bad regulator. Finding the actual restriction first is almost always the better fix.

Will a water softener raise my pressure?

It won't remove scale that's already in the pipes, but it stops new buildup. That keeps fixtures and valves flowing well after they're cleaned or replaced.

Is sudden low pressure an emergency?

It can be. A sudden drop may mean a broken pipe or a failed regulator, so check for water where it shouldn't be and call us. If you find a leak, shut off the main.

How do I know if I have galvanized pipe?

Look where the water line enters the house. Galvanized is dull gray steel with threaded fittings. It's common in homes built before the 1960s.

Tired of a weak shower? Call or text (317) 731-3028, or request service online.