I hate having to wash my hands squashed up against the back of a sink, so I always buy faucets that have a long enough spout to move the water stream forward.

Aerated or laminar water streams are unlikely to splash. However, spout reach is important. Measure from center of the the mounting hold to the cent of the drain. That is your spout reach. buy a faucet with that reach and you should be fine.

But the very best solution is to have your plumber approve your purchase. Plumbers are very smart about such things.

Joining in here from the Ontario plumbing scene. You are right to be cautious - a 3.5-inch sink is what we call a "vessel" or "European" depth, and if you pick the wrong faucet, washing your hands can feel like a trip to Niagara Falls.

I’ve seen plenty of these installed in modern GTA condos and powder rooms. To keep your vanity dry, here are the "Pro" dimensions you should be looking for:

1. The "Bullseye" Rule

StarCraft Custom Builders is right about reach, but with a sink this shallow, you actually want to avoid the "direct hit" on the drain.

The Aim: Try to find a faucet where the water hits about 1 inch behind the drain. If the water hits the drain grate directly, the metal often causes the water to "shatter" and spray upward. If it hits the porcelain just behind the drain, the curve of the sink will catch the energy of the water and swirl it down the drain more quietly.

2. Spout Height vs. Depth

A "Low Arc" is definitely your friend here.

The Math: Look for a spout height (the distance from the vanity top to where the water comes out) that is no more than 4 to 5 inches.

Why: If the water has a long way to fall, it gains velocity. High-arc faucets create more force when they hit the bottom of a shallow basin, causing more splash-back.

3. Aeration is Key

In Ontario, most faucets are low-flow by code, but you want to check the type of stream.

Laminar Flow: This is a clear, solid stream of water (often seen in high-end "boutique" faucets). While it looks beautiful, it splashes more on shallow surfaces.

Aerated Flow: Look for a faucet with a high-quality aerator. It mixes air into the water, making it feel "soft" and significantly reducing splash-back when it hits the porcelain.

4. Angle of the Spout

Check the "angle of departure." Some faucets point straight down, while others aim the water forward at an angle. For a 3.5-inch sink, you want a faucet that points straight down (90 degrees) rather than one that "shoots" the water forward toward the front rim of the sink.

My Advice: Take a tape measure to the showroom. Measure from the center of your faucet hole to the center of your drain. Subtract 1 inch from that number - that is your ideal Spout Reach.

A low-arc faucet is generally a good choice because it keeps the water stream closer to the basin. You should also pay attention to the faucet's spout height and spout reach. A shorter spout height and moderate reach typically work best for shallow sinks.

As a rule of thumb, the water stream should land near or slightly behind the drain, rather than at the front of the basin. If the stream hits too far forward, water is more likely to splash onto the countertop or user. If it lands directly on the drain or just behind it, the basin can absorb the water's energy more effectively.

Other features worth considering:

• A faucet with an aerator to soften the water stream.
• Lower flow rates (around 1.2 GPM) to reduce splash.
• Adjustable flow settings if available.
• Manufacturer specification sheets that show the spout reach and projected water stream location.

Before purchasing, it can help to measure the distance from the faucet mounting hole to the drain center and compare that with the faucet's spout reach. This will give you a better idea of where the water will land in your specific sink.