Shower Door Replacement Parts by Brand (and When Brand Doesn't Matter)

Parts of a shower door, named

Every shower door breaks down into the same short parts list, and naming the failed piece is half the job — it is what a parts diagram really does for you. On a framed slider: the header (the top rail the panels hang from), two side jambs against the walls, the bottom track on the tub or curb, two rollers per panel riding inside the header, a bottom guide keeping the panels parallel at the sill, and slide-in seal inserts in the rail and jamb slots. Framed tracks also have weep holes — a clogged weep mimics a failed seal. On a frameless swing door: hinges, a handle, a press-on bottom sweep, vertical side seals such as a U-channel or bulb seal, and often a magnetic closing strip. The Seal Finder turns glass thickness and gap into a seal shortlist.

Where the model information hides

Brand parts pages ask for a model or series, and doors hide that information well. Check four places in order. First, the glass etch: a small sandblasted logo in a bottom corner of the glass; the tempered-glass safety marking in the same corner often names the fabricator even when there is no brand logo. Second, the frame sticker: a foil or paper label on the edge of a jamb or on the inside face of the top rail — open the door and look up along the header, since installers usually leave that one in place. Third, hardware stamps: hinges, pivot brackets, and roller housings sometimes carry a maker's mark. Fourth, paperwork: the order confirmation, the builder's spec sheet, or the installer's invoice names the exact series. A sharp photo of whatever you find is usually enough for a manufacturer's support line to identify the door.

The brand route: model plus parts diagram

Most major makers — Sterling (a Kohler brand), Kohler, Basco, Delta, MAAX, DreamLine, and Coastal among them — publish parts diagrams for current series and run support lines that can look up older ones. The routine is the same everywhere: identify the model, pull up the exploded diagram, match the broken piece to its callout, and order from the manufacturer or an authorized parts dealer. This is the right route for anything structural or finish-matched: header and track extrusions, brand-specific hinge and pivot hardware, roller assemblies with proprietary brackets, and trim caps in the door's finish. Have three things ready before you contact support: the model or series name, the glass thickness, and a photo of the failed part still in place. For a door more than a decade old, ask directly whether the series is still supported — the answer tells you whether to shop the diagram or the tape measure.

Generic or brand, part by part

When generic is the better buy

For wear items, generic replacements fit because the interfaces are standardized around dimensions, not the brand. A frameless press-on sweep cares about exactly two numbers: glass thickness for the channel and the closed-door bottom gap for the wipe height. On a framed door the seal slides into a slot in the metal rail and is sized to that slot, not the glass — measure the slot and buy a slide-in insert. A vertical seal cares about thickness and edge length. A slider roller cares about wheel diameter — typically 3/4″ or 7/8″ — and flat versus grooved edge. A magnetic pair cares about whether the doors meet at 90 or 180 degrees. None of those numbers know who made the door. Generic is usually faster too: an under-$25 vinyl part in days, versus tracking down a brand order for a door that may be out of production. Save the brand route for the rows in the table marked otherwise.

Measure and match: the generic fallback

1. Identify the part family. Match the failed piece to the anatomy above: sweep, vertical seal, magnetic pair, roller, guide, handle, or hinge — and note whether the door is framed or frameless. Photograph it in place before removing anything; orientation matters later.
2. Framed door: measure the rail slot. Framed-door seals slide into a slot in the metal rail and are sized to that slot, not the glass. Pull out a stub of the old insert, measure its stem width and the slot, and buy a slide-in T or blade insert to match.
3. Frameless door: measure the glass thickness. Press-on seals are sized to the glass: 1/4, 5/16, 3/8 (the US frameless standard), or 1/2 inch. Calipers on an exposed door edge settle it in seconds.
4. Measure the part's critical dimension. Closed-door bottom gap for sweeps, edge length for vertical seals, wheel diameter and bracket hole spacing for rollers, center-to-center hole spacing for handles.
5. Match the profile shape. Hold the old part against product cross-section drawings: U-channel, H-jamb, bulb, blade, drip rail, slide-in T. Shape plus dimensions beats any brand name in a search box.
6. Buy long and cut to fit. Vinyl seals and sweeps come in standard lengths. Cut with a fine-tooth hacksaw to the door width minus 1/16 inch. Press-on channels seat with firm hand pressure and never need glue; framed-rail inserts feed into their slot end-first.

Mistakes to avoid

• Searching a brand name plus 'seal' and buying the first visual match. Profiles vary across years and series; dimensions decide, not the logo.
• Measuring the glass on a framed door. Framed seals are sized to the slot in the metal rail — a press-on channel bought by glass thickness will not fit it.
• Guessing glass thickness from memory on a frameless door. 1/4 inch and 5/16 inch look identical installed and take different channels.
• Replacing one half of a magnetic seal pair. The halves are profile- and polarity-matched; always replace both.
• Ordering rollers from a photo without measuring wheel diameter and bracket hole spacing.
• Gluing on a seal that will not stay put. A press-on channel that needs adhesive is the wrong size — exchange it.