Toilet Bolts in Concrete.

Problem: The bathroom only has one, old bolt sticking up from the concrete slab floor, where the toilet goes. I've also noticed there is no actual flange - flat surface you normally press the wax ring against. Just concrete and a vertical pipe going down.

We're about ready to level the floor, so need it done now.

Can some of you DIY plumbers please advise?

Thanks!

--68.10.xxx.x

Toilet Bolts in Concrete. (by razorback_tim [AR]) Posted on: Jun 13, 2019 11:48 AM
Message:

I would use tapcon's to fasten a flange to the floor then use regular toilet bolts. --70.178.x.xx

Toilet Bolts in Concrete. (by DJ [VA]) Posted on: Jun 13, 2019 11:50 AM
Message:

Cast iron drain --68.10.xxx.x

Toilet Bolts in Concrete. (by NE [PA]) Posted on: Jun 13, 2019 11:51 AM
Message:

What razorback said. Simple.

Just make sure your slots for the John bolts are in the right spot for installing later. --50.32.xxx.xx

Toilet Bolts in Concrete. (by NE [PA]) Posted on: Jun 13, 2019 11:52 AM
Message:

Cast iron drain doesn't matter. You'll be fastening a metal flange ring to the concrete and your wax ring will have a cone on it. --50.32.xxx.xx

Toilet Bolts in Concrete. (by Busy [WI]) Posted on: Jun 13, 2019 12:04 PM
Message:

Tap cons are bolts for concrete. Be sure to get concrete drill bits. I keep the shop vac handy to suction up dust when drilling holes for Tapcons. I start with a smaller drill bit, then move to a larger one. Go slow at the start, the concrete dill bit sometimes wants to ‘walk’ off the mark.

YouTube is your friend. --70.92.xxx.xxx

Toilet Bolts in Concrete. (by Busy [WI]) Posted on: Jun 13, 2019 12:07 PM
Message:

Oh, also, you need a hammer drill for drilling in concrete. I use a corded one, don’t think that would be a good time for a battery operated one.

Another skill in your skill set! --70.92.xxx.xxx

Toilet Bolts in Concrete. (by Robert J [CA]) Posted on: Jun 13, 2019 12:21 PM
Message:

You need to check the height of where the finished floor will be and the height under the toilet to determine if you'll need to install a spacer or thicker wax ring. I would remove the last old bolt. Then with a hammer drill with a masonry drill bit drill new holds in the floor to secure a new flange plate. The flange place will have a place to install new toilet mounting bolts. To lock down the flange plate you can use many different types of anchor inserts. Plastic, lead, etc.

Now you will have a flat surface for the wax seal and new adjusted height for mounting the toilet. Good luck. --47.156.xx.xx

Toilet Bolts in Concrete. (by DJ [VA]) Posted on: Jun 13, 2019 12:47 PM
Message:

How to remove the one old bolt? Without completely busting up the floor? --68.10.xxx.x

Toilet Bolts in Concrete. (by razorback_tim [AR]) Posted on: Jun 13, 2019 12:50 PM
Message:

Use a sawzall, angle grinder, or hacksaw to cut the old bolt. If cutting by hand cut partway through then grab it with a pair of pliers and bend it back and forth until it breaks off. --70.178.x.xx

Toilet Bolts in Concrete. (by Busy [WI]) Posted on: Jun 13, 2019 12:58 PM
Message:

Harbor Freight has angle grinders for under $20. Mine has held up well. --70.92.xxx.xxx

Toilet Bolts in Concrete. (by DJ [VA]) Posted on: Jun 13, 2019 1:01 PM
Message:

Thanks, y'all --68.10.xxx.x

Toilet Bolts in Concrete. (by Robert J [CA]) Posted on: Jun 13, 2019 3:28 PM
Message:

Most of the time toilet bolts are made of a brass alloy, You can grab it with a channel lock pliers and work it back and forth until it breaks off. Or with a hack saw score or cut it first. --47.156.xx.xx

Toilet Bolts in Concrete. (by RR78 [VA]) Posted on: Jun 13, 2019 6:07 PM
Message:

Most tapcons are not stainless. So can rust.

I use #12 flat head stainless screws. With the lead anchors or the plastic fluted ones.

Just as easy and you know will last.

Also best to use the same for the flange. So stainless. --73.152.xx.xxx

Toilet Bolts in Concrete. (by Scott [IN]) Posted on: Jun 13, 2019 8:05 PM
Message:

The installed flange should be about 1/4" above finished floor height to get a proper seal with the wax ring. If the flange is too low, you can add flange spacers or use a super thick wax ring. If the flange is too high relative to the finished floor, you have a problem. --107.141.xx.xxx

Toilet Bolts in Concrete. (by elliot [RI]) Posted on: Jun 13, 2019 8:37 PM
Message:

If the bolts are intact, why bother with if it was done properly? :) --108.34.xxx.xx

Toilet Bolts in Concrete. (by RR78 [VA]) Posted on: Jun 13, 2019 8:55 PM
Message:

Flange should rest on the finished floor.

Just a note. That can be to high if you try to use some of the new waxless seals.

At least american standard toilets have a problem if the flange is installed properly. --73.152.xx.xxx

Toilet Bolts in Concrete. (by Vee [OH]) Posted on: Jun 14, 2019 10:37 AM
Message:

Heat remainder with a torch wearing safety glasses, when the cement pops you will be able to insert a plastic anchor, chances are there is a flange just below the surface, diamond blade in the grinder is messy but will also help you set new stuff in that can allow changing in the future. --76.188.xxx.xx

Toilet Bolts in Concrete. (by Opinionated [NC]) Posted on: Jun 16, 2019 11:27 AM
Message:

Hammer drill does work in concrete-- slowly. Rotary hammer looks similar but is much faster. --66.44.xxx.xxx

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