Trash pull out hardware
Best drawer slides for a trash pull out: 21 in undermount runners, model by model
The best drawer slides for a trash pull out are 21 in full extension undermount runners with soft close, chosen by how many cans ride on them. This guide compares Blum TANDEM and MOVENTO models, side and floor mounting, and Blum’s pre assembled waste and recycle sets, and ends with the exact choices to make in our configurator.
Quick answer. Use a 21 in full extension undermount runner with soft close. For one can, the Blum TANDEM plus BLUMOTION 563H, our standard, does the job; Blum rates its TANDEM line at 100 lb static. For two cans, step up: Blum rates the MOVENTO 763 at 125 lb, the MOVENTO 769 at 170 lb, its TANDEM 568R waste/recycle sets at 125 lb static and its MOVENTO 769R floor mount set at 135 lb static. Every Gritly trash pull out box is 21 in deep, 3/8 in narrower than the opening, and notched for the runner you name. Side mount slides do not fit it.
Ready to build it? The configurator prices every choice live and draws your box in 3D, with the notch and hook holes for your runner in the Back view, before you order.
Why a trash pull out wants a 21 in undermount runner
A trash pull out opens dozens of times a day, often with a knee and a full bag. Full extension matters most: in our 15 and 18 in setups the second can sits at the back of a 21 in deep box, and a runner that stops short leaves it inside the cabinet. Soft close keeps a loaded drawer from slamming, and an undermount runner hides under the box, so the retainer panel lifts straight out.
Every Gritly trash pull out box is 21 in deep and the opening minus 3/8 in wide, our figure for Blum TANDEM and MOVENTO with 5/8 in sides; Blum’s own waste/recycle chart gives the same 11 5/8 in for a 12 in opening. That is 1/32 in narrower than Blum’s 42 mm inside width rule (13/32 in with 5/8 in sides), inside Blum’s +0 / −1.5 mm inside width tolerance, so the runner seats the same. A 21 in Blum TANDEM needs at least 21 15/16 in of inside cabinet depth, or 22 23/32 in with SERVO-DRIVE, and Blum lists the 21 in runner at 21 9/16 in long. Widths by opening are on our trash pull out sizes guide.
Blum TANDEM and MOVENTO models compared
Blum makes two undermount families that fit our notching: TANDEM, with a 35 mm rear notch, and MOVENTO, with a 50 mm notch. The letters matter: a 563H is a TANDEM plus BLUMOTION with soft close, and a 563 with no H is the same runner without it. The 569H was the heavy duty TANDEM; MOVENTO 763 is standard duty, 769 heavy duty and 769R the pre assembled floor mount set. Blum’s ratings, by model:
| Blum model | What it is | Blum’s rating | Lengths | Mounting | Notch | Pick it for |
|---|---|---|---|---|---|---|
| TANDEM 563 (no H) | Full extension, no soft close | 100 lb static (TANDEM line) | 9 to 21 in | Cabinet side only; no rear brackets | 35 mm | Older drawers without soft close |
| TANDEM plus BLUMOTION 563H | Full extension, soft close; our standard | 100 lb static | 9 to 21 in | Side or floor holes; rear brackets allowed | 35 mm | One can, and most doubles |
| TANDEM plus BLUMOTION 569H | Heavy duty TANDEM, same clips as the 563 | Not on Blum’s current TANDEM page | 18 to 30 in | Cabinet side | 35 mm | A 21 in pair you already own |
| MOVENTO 763 | Soft close, four way adjustment | 125 lb | 12 to 21 in | Cabinet side; rear brackets allowed | 50 mm | Two cans, heavy recycling |
| MOVENTO 769 | Heavy duty MOVENTO | 170 lb | 18 to 30 in | Cabinet side | 50 mm | The heaviest doubles |
| MOVENTO 769R set | Floor mount set with locking devices, for SERVO-DRIVE or TIP-ON BLUMOTION | 135 lb static | 21 in | Cabinet floor; 1/4 in maximum recess | 50 mm | Push to open, or a wider opening |
| TANDEM 568R sets (568R5337BB, BD, BF) | Floor mount sets for 12, 15 and 18 in openings, for SERVO-DRIVE uno | 125 lb static, 110 lb dynamic | 21 in | Cabinet floor; 1/4 in maximum recess | 35 mm | Touch to open; face frames without blocking |
Blum’s current TANDEM page lists 9 to 21 in lengths at 100 lb static and its MOVENTO page 125 lb for 12 to 21 in and 170 lb for the heavy duty line, so for a new heavy duty build the MOVENTO 769 is Blum’s answer. We carry the TANDEM 563H and MOVENTO 763 in 21 in in our undermount slides shop; for a 769 or a set, buy it where you find it and name it in the configurator.
Side mounted or floor mounted
Both are undermount runners; the difference is where the cabinet member screws down. A 563H or 763 screws to a cabinet side flush with the opening along the full runner; when the side sits wider than the opening, as behind most face frames or in an unblocked frameless opening, the screws have nothing to bite.
Three fixes, in the order we suggest them. Block out the sides with filler strips flush with the opening; Blum requires this for the 563 without BLUMOTION. Use a Blum rear mounting bracket: the 563H and MOVENTO screw to the face frame in front and to a 295.3750.02 steel bracket or a 295.6410 or 295.6400 nylon socket at the back, with a 1/4 to 1 7/8 in range; we sell them in clips and brackets. Or go to the floor: the 563H has floor mounting holes, and the 568R and 769R sets are floor mount only, on a cabinet bottom Blum says must be flush with the top of the bottom rail and recessed no more than 1/4 in. Our face frame vs frameless guide walks through each.
Standard duty for one can, heavy duty for two
One can on a 563H is the everyday case: a 35 qt can of kitchen trash sits well inside Blum’s 100 lb figure. Two cans is where to read the rating, and glass recycling decides it; Blum’s own waste/recycle sets use its heavy duty runners, which tells you how Blum sizes the job. This is guidance, not a load test; the box carries no rating of its own.
| Setup | Cans | Our suggestion | Blum’s rating |
|---|---|---|---|
| 12 IN OPENING | One 35 qt or one 50 qt | TANDEM 563H | 100 lb static |
| 15 IN OPENING | Two compact 35 qt, front to back | 563H, or MOVENTO 763 for heavy recycling | 100 lb; 125 lb |
| 18 IN OPENING | Two 50 qt, front to back | MOVENTO 763, or a waste/recycle set | 125 lb; 568R 125 lb static; 769R 135 lb static |
| 21 IN OPENING | Two 35 qt, side by side | MOVENTO 763 | 125 lb |
| 22 1/2 IN OPENING | Two 50 qt, side by side | 763, or 769 for lots of glass | 125 lb; 170 lb |
Layouts are in single vs double trash pull out; for push to open, where SERVO-DRIVE uno rides on the floor mount sets and TIP-ON BLUMOTION on MOVENTO, see our push to open guide.
Locking devices, the clips that hold the box on
Undermount runners do not screw to the box. Two locking devices, the orange latches under the front corners, hook the drawer onto the runners and release it when squeezed. Blum’s 563H and 569H take the T51.1901, with side to side adjustment, or the T51.1801 without it; the MOVENTO takes the T51.7601; inset fronts can use the depth adjustable T51.1901.PS. The 568R and 769R sets include their locking devices.
Choose “Install the matching Blum locking clips” under “Locking clips” and we fit the right device before the box ships; the field appears with the two Blum slide choices, and the devices are also in our clips and brackets shop. With “Other undermount slide (name it below)” the field hides; your runner’s maker supplies its own device.
What we notch for, and how to name another runner
Every box gets the rear notch and hook holes for the runner you pick. Blum’s TANDEM calls for a 35 mm (1 3/8 in) notch, 13 mm (1/2 in) high, at each back corner, with a 6 x 10 mm hook bore 7 mm (9/32 in) in from the side and 11 mm (7/16 in) up. MOVENTO uses the same bore and a 50 mm (1 15/16 in) notch; with TIP-ON BLUMOTION it needs about 125 mm (4 15/16 in). The 568R sets take the TANDEM notch and the 769R the MOVENTO notch.
For a Würth PRO600, Grass Dynapro, Hettich, Salice or KV runner, choose “Other undermount slide (name it below)” and type the brand and model as printed on the runner in “Your slide brand and model”. The box stays 21 in deep and 3/8 in narrower than the opening, so check that your maker calls for that width with 5/8 in sides; our undermount slide guide lists each runner’s figure, and a runner that needs another width or length belongs in the custom drawer box configurator.
Screws, brackets and what comes in which box
Loose Blum runner pairs do not include screws: Blum lists its #6 wood screws, 606N or 606P, as a separate part for the runner, the rear brackets and the locking devices. The 568R and 769R sets come with eight pre mounted #6 x 1 in screws, two locking devices with their screws, a template and instructions; drawer and bins are not included. Our box ships with no runners, cans or screws.
Cabinet shops: trade pricing on boxes and hardware runs through our wholesale program.
What to pick in the configurator
The “Slides” field tells us which notch and hook holes to cut, and “Locking clips” whether we install the Blum device. Match your runner to a row.
| Your runner | “Slides” choice | “Locking clips” | Notes |
|---|---|---|---|
| BLUM TANDEM 563H, 563 OR 569H, 21 IN | “Blum TANDEM, 21″ (our standard)” | “Install the matching Blum locking clips” or “No clips” | 35 mm notch; the default |
| BLUM MOVENTO 763 OR 769, 21 IN | “Blum MOVENTO, 21″” | “Install the matching Blum locking clips” or “No clips” | 50 mm notch |
| BLUM 568R OR 769R SET, OR MOVENTO WITH TIP-ON | “Other undermount slide (name it below)” | Hidden; the set’s own devices | Part number, such as 568R5337BD, in “Your slide brand and model” |
| WÜRTH, GRASS, HETTICH, SALICE, KV | “Other undermount slide (name it below)” | Hidden; buy the maker’s device | Exact model; confirm its width rule with 5/8 in sides |
Have your runner picked? Build your trash pull out: the live 3D preview shows the notch and hook holes in the Back view, and a red warning holds Add to cart if a choice cannot be built. Need a side mount box or a shorter one? Send us a photo and your measurements and we quote it.
Trash pull out slide questions
Do I need heavy duty slides for a single can trash pull out?
No. One 35 qt or 50 qt can in a 12 in opening runs fine on a standard duty runner such as the Blum TANDEM 563H, which Blum rates at 100 lb static. Heavy duty runners earn their keep on two can setups, especially with glass recycling.
Can I use side mount slides on a trash pull out?
Not on this box. It is 3/8 in narrower than the opening and notched for an undermount runner; a side mount slide needs a much narrower box with no notch and would sit beside the cans where the retainer panel lifts out. For a side mount trash drawer, use the instant quote.
What length drawer slide does a trash pull out need?
21 in. Every Gritly trash pull out box is 21 in deep to match a 21 in undermount runner; Blum’s 21 in TANDEM runner is 21 9/16 in long and needs at least 21 15/16 in of inside cabinet depth, or 22 23/32 in with SERVO-DRIVE. A shallower cabinet needs a shorter box from the custom drawer box configurator.
Can I reuse the slides from an old wire trash pull out kit?
Usually not. Kit slides are mostly side mount or bottom mount ball bearing slides that screw to the kit’s own frame, and our box is sized and notched for 21 in undermount runners. If the kit used a Blum TANDEM or MOVENTO runner, keep it and pick that model in the configurator.
What are locking devices on undermount slides?
They are the clips under the front corners of the box that latch it onto the runners; squeeze them and the drawer lifts off. Blum’s TANDEM 563 uses the T51.1901 or T51.1801 and MOVENTO the T51.7601. Choose “Install the matching Blum locking clips” and we fit them before the box ships.
Should I choose Blum TANDEM or MOVENTO for a trash pull out?
TANDEM 563H for one can and most doubles; MOVENTO 763 when two cans carry heavy recycling or you want push to open, since TIP-ON BLUMOTION fits MOVENTO. Blum rates the 563H at 100 lb static and the 763 at 125 lb; both are full extension with soft close, and we notch for either.
Related reading
- Trash pull out drawers: the six setups and what is included.
- Face frame vs frameless: mounting runners behind a frame.
- Undermount drawer slide guide: every runner we prep for, with its width rule.
Pick the runner, and we cut the box to match it
Name your 21 in undermount runner and we notch and drill a dovetailed trash pull out for it, built to order in our Las Vegas shop with a lifetime warranty on the wood box. Build yours in the configurator; every option shows its price as you build it.