10-Inch Rough-In Toilets

10-inch rough-in toilets are made for bathrooms where the drain sits closer to the wall than the more common standard, a layout you often find in older homes, condos and basement bathrooms. The rough-in is the distance from the finished wall behind the toilet to the centre of the drain, and a toilet built for a 10-inch rough-in fits that shorter gap without the tank pressing against the wall. This page brings together two-piece toilets built for that measurement from brands such as TOTO and Icera, in colour options such as Cotton and Gloss White.

Examples on this page include the Drake Two-piece Toilet, 1.28 GPF, Elongated Bowl - Universal Height - 10inch Rough-In, the Drake WASHLET + S7 Two-Piece Toilet - 1.6 GPF - Universal Height - 10inch Rough-in and the MALIBU II Two-Piece Toilet, 10-in Rough-in. Before you choose, confirm your measurement with the old toilet still in place, think about bowl shape and seat height for the people who use the room, and check the clearance to any vanity, door or tub nearby. Replacing a toilet in a tight bathroom is far easier when the rough-in is right from the start.

What to check before you buy

• Measure from the finished wall. Measure from the finished wall behind the toilet, not the baseboard, to the centre of the closet bolts at the floor. If there is a thick baseboard, measure above it so the tank will not be pushed forward.
• Check side and front clearance. Note the distance from the drain centre to each side wall or vanity, and how much room is in front of the bowl. An elongated bowl reaches further forward than a round one, which matters in a small room.
• Decide on bowl shape and seat height. Elongated bowls give more seating room, while universal height sits closer to chair height and is easier for many adults to stand up from. Think about who uses the bathroom most.
• Compare flush rates and water use. Toilets are labelled with a flush rate, such as 1.28 GPF or 1.6 GPF, and a lower figure uses less water per flush. Check what your municipality or building allows if you are unsure.
• Confirm the supply line position. Look at where the water shut-off valve sits on the wall and make sure the new tank will not block it. Have the mounting hardware, wax ring or seal and supply line ready before the old toilet comes out.

Related pages and guides

• Toilets
• American Standard Toilets
• TOTO Toilets
• Toilet Rough-In: How to Measure 10" vs 12" Before You Buy
• Rough-In vs Trim: Why Faucets Come in Two Boxes
• Wall Mount Faucet Planning: Rough-In Guide for Canada

Frequently asked questions

How do I know if I need a 10-inch rough-in toilet?

Measure from the finished wall to the centre of the bolts that hold the toilet to the floor. If that distance is close to 10 inches rather than the more common standard, a 10-inch rough-in toilet is the right fit.

Can I install a standard rough-in toilet on a 10-inch drain?

Usually not comfortably, because the tank would hit the wall before the base lines up with the drain. A toilet built for a 10-inch rough-in is designed so the tank clears the wall at that shorter distance.

Are 10-inch rough-in toilets two-piece?

The 10-inch rough-in toilets on this page are two-piece toilets, with examples such as the Drake Two-piece Toilet, 1.6 GPF, Elongated Bowl - Universal Height - 10inch Rough-In and the MALIBU II Two-Piece Toilet, 10-in Rough-in. A two-piece design has a separate tank and bowl, which can make it easier to carry into a tight bathroom.