Deltana SDRL218 Sliding Door Round Privacy Lock (2-1/8")

It's a 2-3/8 inch backset, measured from the door edge to the center of the round trim, with a 2-1/8 inch round face. If the door already has a 2-3/8 inch backset pocket lock in it, the mortise and edge prep line up and this is a straight swap. If the existing prep is a rectangular or larger-diameter plate, the 2-1/8 inch round rose may not cover the old cutout, and you'd want a rectangular pocket lock like the Weslock 0577 instead.

If the old lock is a round 2-3/8 inch backset privacy unit on a door between 1-3/8 and 2 inches thick, yes, the SDRL218 goes back into the same prep. Check the backset first, that's the number that kills most pocket door swaps. If the door is thinner than 1-3/8 inches, this one is out of range and the Pamex PF2 round lock, which starts at 1-5/16 inches, is the one that fits.

The Orca Hardware PDLRD is the closest round-face match. Both are round privacy pocket door locks in the privacy/bed/bath function, so both are built for a bathroom or bedroom pocket door where the occupant locks from inside. The Deltana SDRL218 measures 2-1/8 inch and takes a 2-3/8 inch backset with a door thickness range of 1-3/8 to 2 inch. The Pamex PF2 is another round sliding door lock on a 2-3/8 inch backset, though it covers a narrower 1-5/16 to 1-9/16 inch door thickness, so it suits a thinner door than the SDRL218 range reaches.

The SDRL218 is a privacy/bed/bath lock, so it throws a bolt from the inside. For a closet or hall pocket door that only needs a pull, the Weslock 0627 is a round passage pocket door lock with an adjustable backset and full lip strike, and the Weslock 0527 is the rectangular passage version covering a 1-3/8 to 2 inch door thickness. The Emtek 2101 and the Omnia 7012/N are also passage-function pocket door locks, the Omnia coming with a mortise edge pull.

A privacy lock like the Deltana SDRL218 is bed and bath function, so it has no key cylinder. For a pocket door that has to be locked from outside, the Omnia 7035/A is a keyed entry pocket door lock with modern rectangular trim and solid brass construction, and the Emtek 2153 Narrow Modern Rectangular pocket door mortise lock is a keyed version measuring 2 inch by 7-1/4 inch. Both are rectangular faces rather than the 2-1/8 inch round face of the SDRL218, so the door will need a different mortise prep.

Three come up often. The Omnia 7012/PD is a pocket door lock set in dummy function, so it is trim and an edge pull with no latching at all, not a substitute for the privacy/bed/bath function of the Deltana SDRL218. The Orca Hardware PK1200 is a pocket door frame kit for a 1 inch or 1-3/4 inch door, which is the pocket framing itself rather than the lock. The NGP SLAL250PD72 is a 72 inch aluminum pocket door track rated up to 250 pounds, again hanging hardware and not a lock. If the job is the privacy latch in the door edge, the SDRL218 at 2-1/8 inch on a 2-3/8 inch backset is the part.

Residential. Deltana lists the SDRL218 as a residential pocket door lock, so it suits houses, apartments, and condo bed and bath doors. For a commercial bathroom or a high-traffic institutional opening, look at something built for that duty instead, such as the Rockwood 891 pocket door privacy latch.

It's a trim shape decision, not a function one. The Deltana SDRL218 is round, 2-1/8 inches across, which is the smaller footprint and reads as traditional. A rectangular plate covers more of the door face and matches modern square trim, and the Orca Hardware PDLSQ is the square privacy equivalent if that's the look. Orca also makes the PDLRD round privacy version. On a retrofit the existing cutout usually decides it, a round rose will not hide a rectangular mortise.

Deltana's privacy pocket locks are the standard bed and bath type, and if an outside emergency release is something you specifically need called out, the Omnia 7012/L is a privacy pocket door lock listed with an emergency release. On a rental or a kid's bathroom that release is usually the deciding feature.

The Deltana SDRL218 is a residential-rated privacy pocket door lock, 2-1/8 inch round on a 2-3/8 inch backset. For commercial pocket door openings, the Rockwood 891 pocket door privacy latch is the peer in the same privacy/bed/bath function, and the Omnia 7035/A keyed entry pocket door lock is solid brass construction where the opening has to be keyed. The SDRL218 fits apartment, multi-family unit interior, and hospitality guest bath pocket doors where the duty is residential.

The Omnia 7012/L is a modern rectangular pocket door lock with privacy function and emergency release, which is the feature a facility wants when a bathroom pocket door may need to be opened from outside. The Rockwood 891 is a pocket door privacy latch in the same privacy/bed/bath function. The Deltana SDRL218 is the round-face privacy lock in that group, 2-1/8 inch on a 2-3/8 inch backset for 1-3/8 to 2 inch doors, and comes in oil rubbed bronze, brushed nickel, and polished chrome.

Size and prep. The Deltana SDRL218 is a 2-1/8 inch round privacy lock on a 2-3/8 inch backset for doors 1-3/8 to 2 inch thick. The Emtek #8 Classic Arched pocket door mortise lock is a brass unit at 2-7/8 inch by 7-5/8 inch, and the Emtek 2153 Narrow Modern Rectangular is 2 inch by 7-1/4 inch keyed. Those tall mortise bodies need a full mortise pocket cut into the door edge, while the compact round SDRL218 works from a much smaller prep, which is what matters when retrofitting an existing pocket door rather than prepping a new slab.