Is High Water Pressure Causing Leaks in Your Home?

Hello, this is Nexus Plumbing.

In our last post, we introduced you to Subsoil Drainage and how it helps minimize rainwater damage. Continuing from that, we’d like to share some important tips on how to prevent water leaks caused by high water pressure.

Nexus Plumbing has been providing plumbing services across Auckland for over 5 years. Recently, we’ve seen a sharp rise in requests for pipe repairs—particularly water meter pipe bursts.

When we performed on-site inspections across North Shore, Central City, and Manukau, we found pressure readings consistently over 900 kPa—far exceeding the average household level of 500–600 kPa.

This elevated water pressure is a major contributor to pipe leaks and bursts.

Why does this matter?

• ✓ Older homes are especially vulnerable to pressure-related bursts.
• ✓ Consumer plumbing products are generally rated up to 600 kPa.
• ✓ Watercare reports average water pressure is at least 350 kPa, but may reach up to 1000 kPa in some areas.

What is kPa?

kPa (kilopascals) is a unit used to measure pressure—like water pressure or tire pressure. 500 kPa means 500 kilograms of force per square meter. No wonder older pipes struggle!

Why install a limiting valve?

Limiting valves help regulate the pressure coming into your home, keeping it at safe, steady levels. Most homes have them near the hot water cylinder or garage, but the most vulnerable spot is right after the water meter.

New Standard: Install Right After Water Meter

Due to increased pressure across Auckland, it is now essential to install a limiting valve immediately after the water meter to protect underground piping. Pipes buried under driveways and lawns are costly to repair once damaged.

Tip: If your water meter spins even when no taps are on, it’s a clear sign of a leak.

Promotional Offer

• ✓ Pressure check + leak check + valve installation: $400 + GST
• ✓ Inspection only: $120 + GST

Frequently Asked Questions

• ✓ How do I know if I have high pressure?
  Water blasting out of the outdoor tap is a common sign.
• ✓ Do I already have a limiting valve?
  Most homes do, but older ones may fail and leak or make noises.
• ✓ Can Nexus check for leaks?
  Yes. We check water pressure and inspect for leaks. Repairs quoted separately.
• ✓ Do I still need a new valve if I already have one?
  Yes. The valve must be placed right after the meter to protect underground piping.
• ✓ My water bill suddenly spiked. Leak?
  If the meter spins with no usage, it’s likely a leak. Contact us.
• ✓ How much is pipe repair?
  Leak detection & repair from $450+GST. More if under concrete or multiple leaks.
• ✓ Can leaks be prevented?
  Yes—installing a limiting valve helps reduce stress on pipes and fixtures.
• ✓ Will a leak contaminate my water?
  Rare, but if near pollutants, contamination is possible. Repairs should be prompt.