Picking The Proper Toilet Flange

Roughing in a toilet flange

roughing-in-a-toilet-flange-9-18-14The most important step when roughing in a toilet flange involves measuring for its location from the finished wall, cutting the hole for the toilet flange, and fastening the flange to the floor.

According to the Concord plumbing professionals, the standard location of the center of the flange is a minimum of 12-inches from any finished wall.  In addition, the bottom of the flange will have to be level with the finished floor.  If you plan to lay tile, shim the flange up y the combined thickness of the tile and mortar.

After locating the proper position for the toilet flange, find a CD – is is close to the proper diameter and makes an easy template.  Keep in mind, the center hole mark you place on the floor represents the center of the hole for the flange pipe that goes through the floor.  If the hole’s too small, the pipe won’t fit.  IF it’s too large, you won’t have any wood to hold the screws.

Plumbing Pro Tips to Share

Tip #1  For flanges without a bevel, use the CD to make a reference circle, then center your flange inside that circle to mark the pipe diameter – 18-inch may be added to give your pipe easy clearance – it will be passing through this hole.

Tip #2  Drill a 38-inch hole with a twister drill so its edge falls just on the inside edge of the circle, thin insert a rough-cut jigsaw blade and carefully cut the circle out, turning the saw constantly to keep the blade on the line.

Tip #3  Insert the flange to verify the proper hole diameter.  Orient the flange so the horseshoe-shaped cutouts on each side are at dead center – each 12 12-inches from the wall behind the toilet.  Holding the flange in place, mark the location of the flange screws.

Tip #4  Don’t use the arced cutouts on the flange; they can allow the bowl hold-down bolts to spin when you try to remove them at some later date.

Tip #5  Remove the flange and, using a drill bit about half the diameter of a #12 by 1 12-inch flat-head wood screw, predrill the holes at your marks.

Tip #6  Predrilling makes driving the screws easier and keeps the wood from splitting.  Line up the flange so the mounting holes match with the bowl hold-down slots parallel to the back wall, and drive in the screws with a cordless drill.

Tip #7  Install any remaining fixtures and the finished wall and flo0r.  Rather than sliding the bowl hold down bolts into their slots and having them fall over as you try and drop the bowl on the flange, keep them vertical with a washer and nut.

Tip #8  Then mount the toilet.

PLUMBING TRADE SECRET: Toilet flanges are like plungers, there are all kinds of them, but there is only one you need.  It’s all plastic (no rotating parts), it’s open in the center (no knockouts), and has two small horseshoe cutouts on each side.  Ignore the crescent-shaped slots for the bowl bolts; they can let the bolts spin when you try to turn the nuts.

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