Replacing a toilet without harming a vintage tile floor
Quick answer
Measure the rough-in before you buy, expect the old flange to need repair, and lift the old toilet straight up after cutting any grout bond so vintage tile is not chipped.
Some of the best bathrooms in Alhambra are the old ones. Homes built in the 1920s and 1930s often have their original small hexagon or square floor tile, glazed wall tile in colors that are hard to find today, and bullnose trim around the tub.
Many owners want to keep that tile while replacing a cracked, leaking, or worn-out toilet. That is very doable, but it takes more care than a toilet swap on a modern floor.
This guide covers what is different about older bathroom floors, what you should check before buying a toilet, and what we do to replace the toilet while protecting the tile around it.
Measure the rough-in first
The rough-in is the distance from the finished wall behind the toilet to the center of the drain. Most modern toilets are built for a 12-inch rough-in. Older homes sometimes have 10-inch or 14-inch rough-ins, and buying the wrong toilet means it either will not fit against the wall or sits awkwardly far out.
What sits under an old toilet
Under the toilet is a flange, the fitting that connects the drain to the floor and gives the toilet bolts something to grip. In older houses, the drain is often cast iron, with a flange that was leaded or set into the floor. Over time, those flanges can corrode, crack, or sit slightly below the tile surface, especially if tile was added on top of an older floor.
A flange that is broken or too low is the most common reason a toilet rocks or leaks after replacement. The good news is that there are repair flanges and spacers made for exactly this, and they can usually be installed without opening up the floor.
Signs your current toilet should be replaced
- Cracks in the bowl or tank, even hairline ones that weep
- A toilet that rocks no matter how the bolts are tightened
- Staining or soft spots on the floor around the base
- Constant running that continues after parts are replaced
- An older high-water-use toilet you would like to update
What you can check yourself
Grab the bowl and gently try to rock it. Any movement means the seal underneath is at risk. Look at the floor around the base for discoloration or loose tiles.
Check the shutoff valve on the wall to see whether it turns, since an old stuck valve will need attention before the swap. Our under-sink leak and shutoff work covers stuck valves.
We recommend leaving the actual removal to us on vintage tile. Prying a toilet that has been set in plaster or grout for decades can chip tile at the base, and matching an old tile color is often the hardest part of the whole project.
When to call us
Call when the toilet rocks, leaks at the base, or needs to be replaced, and especially if the bathroom has tile you want to protect. Also call if the floor near the toilet feels soft, since that suggests water has been getting into the subfloor and the cause should be identified.
What the replacement involves
We shut off the water, drain the tank and bowl, and disconnect the supply. Older toilets are sometimes set in a bed of plaster or grout around the base, so we cut that bond carefully with a knife and oscillating tool before lifting. Lifting straight up, rather than rocking, protects the tile.
With the toilet out, we clean old wax off the flange and inspect it. If it is cracked or corroded, we install a repair ring or a new flange designed to fit inside or over the existing drain. If the flange sits low, we use spacers so the new seal is fully compressed. We look closely at the floor around the opening for softness.
The new toilet is set on a fresh seal, leveled with shims if the old floor is uneven, and bolted down snug but not overtight, which can crack porcelain. We connect a new supply line, check for leaks, and finish the base with a bead of caulk or grout to match the floor. Before we leave, we flush it several times and check the base and supply again.
Read more on our toilet repair page.
Keeping old tile intact
If a tile does crack during removal or was already loose, we save the pieces. Sometimes a matching tile can be pulled from an inconspicuous spot, like under a vanity or behind the toilet, and moved to the visible spot. Mention it if you have spare tiles stored in the garage, which is surprisingly common in older homes.
Choosing a toilet for an older bathroom
Measure the rough-in, the space from the side walls or a tub, and the distance to the door swing. Older bathrooms can be compact, so a round-front bowl sometimes fits better than an elongated one. If you want to keep the period look, simple two-piece designs with a plain tank tend to suit vintage tile better than ultra-modern shapes.
If you send us a photo of the old toilet, the floor around it and your rough-in measurement, we can tell you what to look for before you buy.
Bathroom days near West Valley Boulevard tend to end at Chengdu Taste, which is a short drive from a lot of the older bathrooms we work in.
Want us to handle it?
Call or text (626) 684-3505, Mon–Sat 8:30 AM–7 PM. Send a photo and we will give you an upfront quote.
Call or text (626) 684-3505