American Made • Patented • 25+ Years
jtproducts.com  •  845.988.2000  •  sales@jtproducts.com
Lineset Box™
Installation Guide
Line Set Rough-In Box — Step-by-Step Installation
Professional termination point for refrigerant lines, control wiring, and condensation drains.
Lineset Box White
Before You Begin
Rough Opening
5½" × 10½"
Hardware
8 × ¾" galv. deck screws
Timing
During rough-in, before drywall
Tools & Materials
Drill Hole-Saw Silicone Caulk PVC Cutter ¾" Deck Screws (8) PVC Coupling PVC Cement Lineset Box™
Part 1 — Rough-In & Mounting
Cut rough opening in wall
1
Cut Rough Opening
Cut a 5½" × 10½" rough opening in the wall sheathing.
Mount the Lineset Box
2
Mount the Box
Install the Lineset Box™ and secure with 8 × ¾" galvanized deck screws (or equal).
Cut hole for line set
3
Cut Hole for Line Set
Cut a hole with a hole-saw in the top of the box to the size of the line set.
7/8" x 3/8" line set = 1 7/8" hole-saw
Run the line set
4
Run the Line Set
Run the line set into the box to the bottom, or through it if you prefer to leave it long.
Run low voltage wire
5
Run Low Voltage Wire
Run the low voltage wire into the box following the line set.
Cut hole for condensation drain
6
Cut Hole for Drain
Cut a 2nd hole in the top of the box for the condensation drain.
¾" schedule 40 PVC = 1" hole-saw
American Made • Patented • 25+ Years
jtproducts.com  •  845.988.2000  •  sales@jtproducts.com
Lineset Box™ Installation Guide
Page 2 of 2
Part 2 — Condensation Drain & Finish
Cut PVC stub and glue coupling
7
Cut Stub & Glue Coupling
Cut a 7-inch long PVC stub and glue it onto a coupling.
Insert drain stub into hole
8
Insert the Drain Stub
Insert the 7-inch long stub into the hole you cut for the condensation drain.
Seat the coupling tight
9
Seat the Coupling
Push the stub down until the coupling is tight to the top of the box.
Drain locked in position
10
Drain is Locked In
The drain is now sturdy, square, and plumb — it won't be moved by other contractors working from the inside.
Finished professional look
11
Finished Look
Professional termination point. Inspect from outside before closing the wall.
Seal all holes with silicone
12
Seal All Holes
Seal all holes from the inside with silicone caulk. Guards against air infiltration, moisture, and pests.
Pro Tip — Protect Your Bottom Line
How many times have you scoped out where to run your line set, gone to lunch, and come back to find the plumber or electrician took the bay? Install the Lineset Box™ the moment you cut the house — just one kink in a copper line set and it's done, with hours of unbillable time and open flames in a finished wall. Install it early. Own that bay.
J.T. Products LLC  |  jtproducts.com  |  sales@jtproducts.com  |  845.988.2000
P.O. Box 626, Warwick, NY 10990
© 2026 J.T. Products LLC
Lineset Box™ is a trademark of J.T. Products LLC
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