Bidet Seat Installation Guide: What You Need to Know

The biggest hesitation most people have about buying a bidet seat is installation. The good news: mounting the seat itself is straightforward.

However, the water supply connection is non-negotiable—under New Zealand plumbing regulations (NZBC G12 and AS/NZS 3500), any bidet seat connected to your potable water supply must be installed by a registered plumber to ensure proper backflow prevention.

This guide covers exactly what the plumber handles, what you can easily do yourself, what comes in a Conor installation kit, and what setup costs typically look like in New Zealand.

Before you buy: Read our How to Choose a Bidet Seat for NZ Plumbing Compatibility guide—getting your toilet bowl shape (D-shape, O-shape, or elongated) and water inlet position right before ordering saves significant time and effort. Not sure which seat to pick? Explore our guide to the Best Bidet Seats in New Zealand 2026.

How Bidet Seat Installation Works

1. The Water Connection (Registered Plumber Required)

A registered plumber connects a T-adapter valve to your existing water line, splitting the feed to supply both your toilet cistern and the bidet seat.

This step is a legal requirement under New Zealand plumbing standards for any fixture attached to the mains water supply—it protects your home's drinking water from backflow and ensures full compliance with local council regulations.

2. Mounting the Seat (Quick & DIY-Friendly)

Once the plumber completes the plumbing connection, mounting the seat is easy:

1. Unscrew and remove the two rear bolts holding your old toilet seat.

2. Secure the new mounting bracket using the provided hardware.

3. Slide the bidet seat onto the bracket until it clicks into position.

4. Attach the free end of the bidet hose to the seat's water inlet fitting.

Most people complete this part themselves in 10 to 15 minutes.

3. Power Outlet (For Electric Models Only)

If you choose an electric bidet seat, you will need to plug it into a nearby 230V RCD-protected power outlet. If you don't have an outlet near the toilet, a registered electrician can install one—typically under an hour's work.

What’s Included in Every Conor Installation Kit?

All Conor bidet seats ship with everything required for a seamless installation:

• Compliant T-Adapter Valve: Splits your existing water supply line safely.

• Flexible Stainless Bidet Hose: Connects the T-adapter to the bidet seat inlet.

• Universal Mounting Hardware: Includes quick-release brackets, rubber expanding bolts, and top-fixing caps.

• Rubber Washers & Seals: Ensures leak-free connections without needing extra supplies.

Nothing additional needs to be purchased separately for standard toilet setups.

What a Registered Plumber Will Do

1. Water Isolation: Shuts off the water supply at the isolation valve behind or beside the toilet.

2. Pressure Relief: Flushes the toilet to empty the cistern and release pressure line tension.

3. T-Adapter Assembly: Disconnects the existing flexible hose from the cistern inlet and fits the brass T-adapter.

4. Line Reconnection: Reattaches the cistern hose to one outlet and the new bidet supply line to the second outlet.

5. Leak & Backflow Check: Restores water pressure and tests all joins under pressure to confirm a 100% leak-free seal.

Note: Standard plumbing installation for a bidet seat typically costs between $120 and $250 NZD in most New Zealand regions.

What You Can Do Yourself

Once your plumber has prepped the water line:

1. Remove Old Seat: Lift bolt covers at the back of your toilet pan, unscrew nuts underneath, and lift the old seat off.

2. Secure Bracket: Position the Conor adjustable mounting template over the bolt holes and tighten firmly.

3. Lock Seat in Place: Slide the bidet seat backwards into the bracket until you hear a solid click.

4. Connect Hose: Hand-tighten the flexible water hose onto the bidet seat's side water inlet.

5. Test & Adjust: Turn on the water, test the spray nozzle functions, and adjust water pressure to your liking.

Which Conor Seats Have the Simplest Installation?

• Simplest Overall (Non-Electric): The Conor Elara D-Shape and O-Shape models require no power source at all—just the plumber's water line connection and quick seat mounting.

• Attachment Style: The Conor Zerra Attachment mounts beneath your existing seat, making the seat-mounting step even faster without removing your original toilet cover.

• Premium Electric: Models like the Conor Sylora, Ayora, and Arista follow the exact same water connection process, then simply plug into a standard power point.

• Accessibility & Mobility Options: For users with Disability Support Services (DSS) or ACC-funded bathroom modifications, the auto-opening lid on models like the Ayora and Arista eliminates the need to manually touch the seat. Read our DSS & Accessibility Bidet Guide for details.

Post-Installation Care & Maintenance Tips

• Dial in Nozzle Positioning: Take a few uses to adjust the retractable nozzle angle for ideal comfort.

• Start with Low Pressure: Default spray settings can feel surprisingly firm for first-time users—start on setting 1 or 2.

• Check Joinery After 7 Days: Hand-tightened fittings can occasionally settle; give hose nuts a quick snug check after a week of use.

• Routine Nozzle Cleaning: Most Conor seats feature an auto-self-cleaning wand. Giving the nozzle a quick wipe with a soft, damp cloth monthly keeps it running smoothly.

Frequently Asked Questions

Do I need a plumber to install a bidet seat in New Zealand?

Yes. Under New Zealand plumbing regulations, connecting any bidet device to your home’s potable water supply must be completed by a registered plumber to ensure proper backflow protection and compliance with NZBC G12 standards.

What comes inside a Conor bidet seat installation kit?

Every kit includes a compliant brass T-adapter valve, flexible braided water hose, mounting brackets, rubber expanding bolts, washers, and top-fixing hardware—everything required for setup.

How long does bidet seat installation take?

The plumbing connection typically takes a registered plumber 30 to 45 minutes. Mounting the seat and connecting the hose takes another 10 to 15 minutes.

Do electric bidet seats require an electrician as well?

Only if you do not already have an RCD-protected power outlet within reach of the toilet. In that case, a registered electrician can install a new bathroom outlet quickly.

Which bidet model is easiest to mount?

Non-electric models like the Conor Elara or Conor Zerra attachment are the simplest, as they eliminate electrical wiring considerations altogether.