Plumbing guide
Under Sink Organizer for Double-Sink Plumbing
Double-bowl plumbing drops two tailpieces and runs a horizontal arm between them, usually 6 to 10 in above the cabinet floor at the back. Plan three zones: left of the left drain, right of the right drain, and a low front strip under the crossover. The center back is gone.
A double sink roughly doubles the pipework: two baskets, two tailpieces, one shared trap, and a crossover arm that fences off the back of the cabinet at exactly drawer height. Add a disposal on one bowl and that side behaves like a disposal cabinet on its own.
The good news is width: double-bowl bases are usually 33 to 36 in, so the two outer zones are still generous, often 8 to 11 in each, and the front strip runs nearly the full width below the crossover.
Recommended layout
Treat it as two small cabinets joined by a low shelf strip; nothing tall or deep belongs between the drains.
Start here: Split the cabinet into left and right lanes of about 13.5 in each. Use organizers that stop short of the trap bend, plus a low bin in the front strip.
Use this page's approach if
33-to-36-in double-bowl bases, with or without a disposal on one side.
Skip or adjust it if
your double sink drains through a single centered outlet (some do); then the standard center-pipe rules apply.
| Storage zone | Max width | Max depth | Max height | Best use |
|---|---|---|---|---|
| Left zone | 13.5 in | 21.5 in | 16 in | Narrow slide-outs, bin stacks, side baskets |
| Right zone | 13.5 in | 21.5 in | 16 in | Narrow slide-outs, bin stacks, side baskets |
| Front strip | 35.5 in | 10.3 in | 9 in | Low trays and one-motion daily bins |
| Back strip | 35.5 in | 18.5 in | 16 in | Only if every joint stays visible and reachable |
Size classes that match this layout
| Size class | Shop at or under | Fit | Where it goes | Notes |
|---|---|---|---|---|
| Slim side basketvery narrow, 5-6 in lanes | 5.5 in W × 14 in D × 10 in H | Likely fit | Left zone | Rescues the sliver of space beside offset plumbing. plumbing position unknown. Small capacity: best for brushes and refill packs stored upright. |
| Stackable binnarrow, 5-7 in lanes | 6 in W × 14 in D × 7 in H | Likely fit | Left zone | Fits the tight lane every other class gives up on; rental-safe. plumbing position unknown. Buy open-front: the lower bin must stay reachable without unstacking. |
| Slide-out drawernarrow, for 6.5-8 in lanes | 8 in W × 16 in D × 13 in H | Likely fit | Left zone | Daily-access winner for a clear side lane beside the trap or disposal. different style than you picked, still workable; plumbing position unknown. Rails need about 0.25 in of side play and a clear travel path front to back. |
| Compact two-tier shelfside-lane, 7.5-10 in wide | 8 in W × 15 in D × 14 in H | Likely fit | Left zone | Doubles shelf area in one lane without any mounting. different style than you picked, still workable; plumbing position unknown. Check lower-tier clearance against your tallest daily bottle. |
| Shallow vanity binsmall-format, low vanities | 8 in W × 10 in D × 5 in H | Likely fit | Left zone | Sized for low-bend vanities and 13-15 in door openings. compact class; will not use the full cabinet; plumbing position unknown. Made for vanities; wastes space in a full-depth kitchen base. |
| Stackable binstandard, 8-11 in lanes | 9 in W × 13 in D × 8 in H | Likely fit | Left zone | The zero-risk default for any plumbing layout. plumbing position unknown. Stack two high at most; the top bin needs 1 in of lift-out room. |
| Slide-out drawerstandard, for 9-11 in lanes | 10 in W × 18 in D × 14 in H | Likely fit | Left zone | Main organizer for the wide lane of an offset-trap kitchen cabinet. different style than you picked, still workable; plumbing position unknown. Confirm the closed length plus rail hardware fits your usable depth. |
| Two-tier slide-outtall, needs a high bend | 10 in W × 18 in D × 17 in H | Likely fit | Left zone | Maximum capacity where the lane is wide and the bend sits high. different style than you picked, still workable; plumbing position unknown. Total height 17 in: only for bends above about 18 in. |
What not to buy here
Anything that must pass behind the tailpieces, full-width drawers, and one-piece organizers wider than a single door opening if a stile splits the doors.
Mistakes this page exists to prevent
- Planning the interior and forgetting the center stile: many double-door bases pass only 14 to 16 in per door.
- Sliding a deep bin into the middle until it rests on the crossover arm.
- Ignoring the dishwasher connection that usually rides along one wall of these cabinets.
Common questions
How high does the crossover arm sit?
Commonly 6 to 10 in above the cabinet floor at the back wall, sloping between the two tailpieces. Everything below it in the front strip is usable for low trays.
One bowl has a disposal. How does the layout change?
That side loses its inner lane to the disposal body; keep it to one narrow outer organizer and shift bulk storage to the other side.
What is the realistic outer-zone width in a 36-in base?
Usually 8 to 11 in per side after the drain hardware, but the door opening (often 14 to 16 in per door with a stile) is the pass-through limit.