Space-Saving Bathroom Siphon NT Lira: Installation Guide 2026

With the Spazio Bagno NT Lira siphon, you can reclaim almost the entire space under your sink. This clever fixture is designed to hug the wall, routing the drain pipe just below the basin outlet and reducing its depth to a mere 40 mm. Perfect for creating extra storage or simply achieving a cleaner, more modern bathroom look.

The installation kit includes the Spazio Bagno NT Lira siphon with a Ø 32 mm wall connection pipe, two Ø 32 mm pipes with an elbow end (each fitted with locking rings and cuttable to size), a wall drain adapter with gasket that expands from 32 mm to 40 mm if needed, and a 1” to 1¼” reducer for the basin connection, also complete with gasket.

An even more complete version includes the Basket Bagno Bassa drain (also sold separately) to replace your existing one: with only 60 mm of projection at the base of the fixture, it saves precious extra centimeters in height. Plus, this space-saving drain comes with a “No problem” stopper that closes with a simple finger press and lifts easily by its collar.

Traditional bottle traps are not only an eyesore in a modern bathroom but also prevent you from installing useful accessories—like a storage bench or vanity—under the sink, as they interfere with legroom. As shown in the main image, the Spazio NT solves this problem completely.

Step-by-Step Installation

1. Remove the Old Siphon

Place a bucket underneath to catch any water left in the old trap. Unscrew the connections and remove the existing siphon carefully.

2. Measure the Wall Connection Pipe

The wall connection pipe is longer than needed. If left as is, it will hit the inside of the descending curve, reducing flow and pushing the siphon away from the wall. Insert the pipe/siphon block into the wall drain until it stops at the curve, then measure the excess length between the back of the siphon and the wall. Cut the pipe so the siphon sits flush against the wall without obstructing the internal curve.

3. Attach the Elbow to the Basin Drain

Screw the elbow onto the thread coming from the basin drain, orienting it so the flow is directed toward the wall and aligns with the center of the siphon.

4. Measure and Cut the Horizontal Pipe

Measure the distance between the base of the cylindrical inlet on top of the siphon and the center of the horizontal pipe (in this case, about 120 mm). Cut the supplied pipe to match, then connect it using the locking rings.

5. Final Assembly

Tighten all connections by hand—do not overtighten. Check for leaks by running water. If needed, use the included wall drain adapter to increase the diameter from 32 mm to 40 mm.

Tips for Maximizing Under-Sink Space

• Use the reclaimed space for a small rolling cart or pull-out organizer.
• Install a mirror above the sink to enhance the sense of openness.
• Add under-cabinet lighting to brighten the area.
• Consider a wall-mounted shelf for toiletries.

Frequently Asked Questions

Q: Can I install this siphon myself?

A: Yes, with basic DIY skills and the included instructions, most homeowners can complete the installation in under an hour. You'll need a bucket, a hacksaw (for cutting pipes), and a wrench for tightening.

Q: Will this work with any sink?

A: The kit is designed for standard bathroom basins with a 1¼” drain outlet. If your sink has a different size, you may need an adapter (not included).

Q: How much space does it really save?

A: The siphon itself projects only 40 mm from the wall—compared to 100–150 mm for a traditional bottle trap. Combined with the low-profile basin drain, you can gain up to 10 cm of usable depth under the sink.

Q: Is the siphon compatible with a garbage disposal?

A: No, this model is intended for bathroom sinks only and should not be used with kitchen disposals. For kitchen applications, check our home improvement collection for appropriate options.

Q: What if my wall drain is 40 mm instead of 32 mm?

A: The kit includes an adapter that expands from 32 mm to 40 mm, so it will work with both standard sizes.

Ready to upgrade your bathroom? Explore our full range of bathroom vanities, mirrors, and lighting to complete your space-saving renovation. For more outdoor projects, don't miss our garden supplies and outdoor patio furniture collections.

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