OATEY 42256 4 in. Cast Iron Flange with Test Cap

No caulking is required. The 42256 installs over the pipe without a poured joint or oakum and lead, which is the main reason it gets used on retrofit work where there is no room to pour a joint on a finished floor.

It ships complete: body, brass ring, bolts and gasket, plus a pre-installed test cap. The only thing you add on the job is the wax ring or waxless seal for the toilet itself.

The test cap comes pre-installed so the rough-in can be pressure or water tested before the finish floor and fixture go on. It is knocked out and discarded at trim-out, right before the toilet is set. Plumbers doing new construction or a permitted remodel usually want a flange like the 42256 for exactly this reason, since it saves a separate test plug.

Go cast iron like the Oatey 42256 when the existing stack is cast iron soil pipe, when the traffic is heavy, or when you want a corrosion-resistant body with a brass closet ring that will not distort under repeated fixture changes. PVC flanges make sense on plastic DWV where the flange can be solvent welded in. The 42256 covers both situations, since Oatey rates it for plastic as well as no hub and service weight soil pipe.

Order Oatey 42256. That is the manufacturer part number for the 4 inch cast iron toilet flange supplied with brass ring, bolts, gasket and pre-installed test cap.

It weighs 2.7 pounds complete with the ring, bolts and gasket, so it is a one-hand set even working over your head in a crawlspace. That weight also puts it well inside standard small-parcel shipping for anyone stocking several for a multi-unit turnover.