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The PLUMB SHOP DIV BRASSCRAFT 638221 is a ribbed plastic toilet shim designed to level and stabilize floor-mounted toilets on uneven or sloped flooring. The ribbed surface pattern locks stacked shims in place, reducing slippage during and after installation. Each shim measures 3.5 inches in length and 1 inch in width, making it easy to position under toilet bases without interfering with surrounding flooring. Plumbers and fixture installers use these shims as a quick, low-cost fix to eliminate rocking before setting the toilet permanently with an approved adhesive or caulk.
This toilet shim is suited for residential and light commercial plumbing applications wherever a floor-mounted toilet requires leveling. The ribbed profile allows two shims to be double-stacked for greater height adjustment when standard single-shim thickness is insufficient. Sold individually per unit, these shims are typically purchased in multi-unit quantities to keep a supply on hand for toilet set jobs throughout a service route.
Designed as a general-purpose leveling shim for standard residential and commercial floor-mounted toilet installations.
Installation is performed by a licensed plumber or qualified fixture installer. Shut off the water supply and remove the toilet before shimming if the toilet is already set. Slide shims under the toilet base at points of contact with the floor, stacking as needed to achieve a stable, level fit. Once the toilet is confirmed level and stable, trim any exposed shim material flush with the base and apply caulk around the perimeter per local plumbing code requirements.
We pulled together the parts most installs need for this unit, plus a few add-ons worth a look. Check what you need — nothing here blocks checkout.
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