Magvent MV-90 Dryer Vent in Dryerbox Installation

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In this video, MagVent® Man shows you how to install MagVent’s MV-90 magnetically aligned dryer vent coupling in Dryerbox’s® DB 350. The DB 350 is a heavy gauge metal box for new construction situations involving a 2X4 wall. The Dryerbox comes in several models, all of which work with the MV-90. The DB 350 and DB 425 are for new construction situations involving a 2X4 and 2X6 walls, respectively. The RB 400 and RB 500 are for renovation situations where the drywall has already been hung, also 2X4 and 2X6 walls, respectively. If possible, it is a good idea to use a 2X6 wall behind the dryer. It’s a busy part of the house possibly having hot and cold water, drainage DWV system, electrical 120V and 240V, gas piping, and, of course, the dryer vent system, which should be 4” rigid metal pipe inside the wall cavity. Four inch rigid metal pipes have never fit well in the 3 1/2” stud bays of 2X4 walls. The bane of contractors, appliance installers, HVAC contractors, and drywallers alike. A 2X6 wall (or furred out 2X4 wall) will save you from having to oval the rigid metal pipe and give you more room for your other services as well.

Video Highlights:
0:55 Locating the Dryerbox
2:15 Packing out stud with 2X4 and 1/2” drywall scrap to shift the Dryerbox over 2”.
2:59 Use of adjustable elbow to shift position of MV-90 for preexisting Dryerbox installations.
3:55 Mounting the Dryerbox to the studs.
4:01 Marking position of the MV-90.
4:18 !Important Warning! For most installations where the Dryerbox back is against the wall of adjoining room: DO NOT USE INCLUDED 1” SCREWS. Use instead 1/2” self-tapping screws to avoid puncturing the drywall in the adjoining room.
4:23 Mounting the MV-90 bracket with 1/2” self-tapping screws.
4:27 Engage bracket tabs in mounting slots on the sides of the MV-90 to attach.
4:35 Ovalling pipe to go in the DB 350.
4:47 Rounding back the ovalled pipe and partially ovalling the MV-90 port to make the connection.
5:20 Fire caulking the rigid metal pipe/Dryerbox interface.
5:40 Tip for caulking the difficult to reach place behind the vent pipe. Use gloved hand.
6:03 Marking Dryerbox radii on cardboard template.
6:55 Marking and cutting drywall.
7:42 Trimming and caulking.
7:55 MagVent Mating!
8:05 Final install measuring 7/8” away from the wall.
8:18 Concluding remarks.

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