12 ft Ductless Mini Split Line Cover Kit — 4" (110 mm) for Larger Line Sets
Step up to the wide-body cover for bigger installations. The Hercules LSDK Smart Duct Installation Kit is the 4 in (110 mm) version of our line-set concealment system, giving the extra internal room needed for larger-diameter refrigerant line sets, control wiring, and a full 3/4 in PVC condensate drain line — all hidden in one clean housing across a run of up to 12 ft (144 in / 3660 mm). For smaller line sets, see the 3-inch LSDK75 line cover kit.
What's Included
| Line Duct (Split Line Tube) | 3 pcs — SDD110 — 4.33 in / 110 mm wide × 3.07 in / 78 mm tall; each section 4 ft / 48 in / 1220 mm long (12 ft / 144 in / 3660 mm total) |
|---|---|
| Coupler / Joint | 2 pcs — SJ110 — 3.15 in / 80 mm |
| End Fitting | 1 pc — SRJ110 — 3.54 in / 90 mm |
| Wall Inlet | 1 pc — SWW110 — 9.65 in / 245 mm |
| Universal Elbow (90°) | 1 pc — SEC110 — 8.11 in / 206 mm |
| Kit Part Number | LSDK (8 pieces total) |
Key Features & Benefits
- Wide 4 in (110 mm) body: 4.33 in / 110 mm wide by 3.07 in / 78 mm tall — extra room for larger line sets that won't fit a 3-inch cover.
- Fits a 3/4 in PVC drain line: enough internal space to route the refrigerant copper, control wire, and a 3/4 in PVC condensate drain together.
- Up to 12 ft (144 in / 3660 mm) coverage: three 4 ft / 48 in / 1220 mm line-duct sections join with couplers for a continuous run.
- Paintable finish: smooth exterior accepts standard exterior paint so the cover disappears into the wall.
- Fire-resistant ABS: molded from fire-resistant ABS plastic rated to an equivalent UL-94 V-0 standard.
- UV resistant: holds up to sun exposure on outdoor line-set runs without fading or becoming brittle.
- Natural sand color: neutral finish that blends with most exterior walls out of the box.
- Sized for bigger systems: ideal for higher-capacity single-zone and multi-zone mini-splits with larger line sets.
Typical Installation
- Mount the wall inlet (SWW110) at the line-set wall penetration.
- Mount the line duct (SDD110) sections. Route the copper line set, control wire, and 3/4 in PVC drain line through.
- Join sections with couplers (SJ110); use the 90° universal elbow (SEC110) at corners and transitions.
- Trim the line duct to length as needed for each run.
- Finish the open end with the end fitting (SRJ110).
- Paint to match the exterior wall if desired.
Specifications & Manuals
Product documentation includes the manufacturer submittal / production specification sheet to assist with product selection and installation.
Frequently Asked Questions
How is the 4-inch LSDK different from the 3-inch LSDK75 kit?
The LSDK uses a wider 4 in / 110 mm duct (4.33 in / 110 mm wide × 3.07 in / 78 mm tall) versus the 3 in / 75 mm LSDK75. The extra width accommodates larger line sets and leaves room for a 3/4 in PVC drain line, so it's the better choice for higher-capacity systems.
Can this cover run a 3/4 inch PVC condensate drain line?
Yes. The 4 in (110 mm) duct is sized to hold the refrigerant line set, control wiring, and a 3/4 in PVC drain line together in a single channel.
What total length does one LSDK kit cover?
Each kit includes three 4 ft / 48 in / 1220 mm line-duct sections for up to 12 ft / 144 in / 3660 mm of straight-line coverage, and the sections can be trimmed to fit your run.
Is the LSDK a good fit for larger or multi-zone mini-splits?
Yes. The wide-body 4 in profile is intended for higher-capacity single-zone and multi-zone systems that use larger-diameter line sets which won't fit inside a 3-inch cover.
Does the kit include the fittings needed to finish the run?
It does. The LSDK ships as eight pieces: three line-duct sections (SDD110), two couplers (SJ110), one end fitting (SRJ110), one wall inlet (SWW110), and one 90° universal elbow (SEC110).
What is the LSDK duct made from and can it be painted?
The components are molded from fire-resistant ABS plastic rated to an equivalent UL-94 V-0 standard in a natural sand color. The surface is UV resistant for outdoor use and paintable if you want to color-match the wall.
Submittal LSDK
