The shower that barely flows, the faucet that fills the pot slowly, the boiler that struggles to start when you turn on the hot water. It’s almost always a matter of low pressure. Sometimes it depends on the public network, other times on something inside the house that you can fix yourself. Before calling a plumber, there are several checks and solutions worth knowing.
Understanding if the pressure is really low
The ideal pressure at home is around 2 to 3 bar. Below 1.5 bar you start to notice the difference, below 1 bar the shower becomes uncomfortable and some appliances don’t work well. The easiest way to find out is a pressure gauge to screw onto an outdoor faucet or the water system; it’s inexpensive and immediately tells you your level. Without measuring, you risk acting blindly.
The most common causes inside the house
- Clogged filters and aerators. Limescale blocks the small filters in faucets and showerheads. Often the pressure is normal, but only a little water comes out from that point.
- Pressure reducer set too low. Many systems have a reducer at the entrance. If it’s poorly adjusted or broken, it cuts the pressure even when it’s not needed.
- Old and encrusted pipes. In older systems, limescale reduces the internal diameter of pipes and restricts flow.
- Weak public network. In some areas, especially on upper floors or outskirts, the water supply already arrives with low pressure.
Simple solutions to try
Start with quick fixes. Unscrew the faucet aerators and the showerhead, soak them in vinegar for a few hours to dissolve limescale, then reassemble them. Check the pressure reducer: it has an adjustment screw or knob, and sometimes just raising the setting slightly solves the problem. Also verify that the water inlet valves are fully open; it’s more common than it seems for them to remain half-closed after maintenance.
When you need a pressure tank or a pump
If the network pressure is low by itself, no cleaning will raise it. In that case, the real solution is a pressure tank, that is, a pump with a small tank that maintains constant pressure throughout the house. It’s the classic remedy for top floors, isolated houses, or systems with many water points. In the plumbing section you’ll find pressure tanks, pumps, and pressure reducers to size the system according to your needs.
Who to contact and what to avoid
You can clean filters and adjust the pressure reducer yourself without problems. Installing a pressure tank or pump, however, should be entrusted to a plumber, because it’s necessary to properly size the power and connect to the system at the right point. Avoid installing oversized pumps hoping for more pressure: a pump that’s too powerful stresses pipes and seals and can cause water hammer. The right, constant pressure is worth more than a lot of poorly managed pressure.
Frequently Asked Questions
What is the ideal water pressure at home?
Between 2 and 3 bar. Below 1.5 bar you start to notice the difference in the shower and faucets, above 4 bar you risk stressing pipes and seals. A pressure gauge screwed onto a faucet tells you immediately what level you’re at.
Can I increase pressure without a pump?
Sometimes yes. If the problem is limescale in filters or a pressure reducer set too low, just clean the aerators and adjust the reducer. If low pressure comes from the public network, then a pressure tank is needed to really solve it.
Does the pressure tank consume a lot?
No, it only works when you open the water and has a tank that reduces starts. The electricity consumption for normal domestic use is low. It’s more important to choose the right power for the house than to worry about the bill.