GoCode Slim In-Floor Shower Pan
The GoCode SLIM is the lowest-profile in-floor shower pan available — just 3/4" deep, requiring only a 3/4" subfloor compared to the 1.3" minimum needed for the standard pan. Made from brushed magnetic stainless steel and designed to recess flush into your floor, it stays out of the way and hidden in plain sight until you need it.
Features
- 3/4" total depth — fits builds with thinner subfloor assemblies where the standard pan won't work
- Recesses flush into your floor surface for zero trip hazard and maximum headroom
- Brushed magnetic stainless steel construction
- Center drain with included 1-1/2" threaded straight drain fitting
- Compatible with the Tetravan Universal Shower Curtain — 3/8" tall magnets grab securely around the 3/4" pan edge for a watertight seal
- Flat bottom with no built-in drainage angles — recommended for builds on a slight slope, or plan to squeegee after use
What's Included
- Tetravan Slim in-floor shower pan (brushed stainless steel)
- 1-1/2" threaded straight drain fitting
Compatibility
- Compatible with any van, trailer, truck camper, popup camper, or fifth wheel build
- Requires minimum 3/4" subfloor depth
- Compatible with Tetravan Universal Shower Curtain (sold separately)
Dimensions
- Overall: 24" x 24"
- Interior (recessed area): 22" x 22"
- Total Depth: 0.85"
- Flange Width: 1"
- Center Drain Diameter: 2.01"
Shipping & Lead Times
- Ships in 1-2 business days
Installation Notes
- Flat bottom — no built-in drainage angles. Water will not self-drain on a level surface. Plan for a slight slope in your build or use a squeegee after showering.
- Recommended install: adhesive on underside of flange plus at least 1" countersunk screws through flange into subfloor.
Video below is an example of how to install the GoCode Slim In-Floor Shower Pan.
How Do I Install the GoCode Stainless Steel In-Floor Shower Pan in a Van?
Install a GoCode in-floor shower pan by cutting a 22" x 28" opening in your floor, drilling a 2 3/4" drain hole, and setting the pan in silicone adhesive. Before you cut, confirm you have at least 1 1/4" from the top of your finished floor surface to the top of the factory floor, and that nothing under the van blocks the drain. Let the pan dry overnight, then plumb to the drain.
Before You Start
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Vehicle: Any van
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Kit: GoCode Stainless Steel In-Floor Shower Pan
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Drain profiles: Left-hand, right-hand, and center drain. This guide shows the left-hand drain.
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Depth check: Measure your floor, subfloor, and insulation. You need at least 1 3/8" from the top of the finished surface to the top of the factory floor.
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Under the floor: Make sure the drain location is clear of struts, fuel lines, brake lines, or anything else that would block the install.
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Above the floor: Make sure cabinets or other build elements won’t get in the way of hanging your curtain.
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Estimated installation time: 1 hr
Tools & Materials
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Drill with a 2 3/4" hole bit
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Tool for cutting the floor opening
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Tape measure and marker
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Silicone adhesive
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Primer for the cut metal
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Any 1 1/2" threaded fitting for plumbing to the drain
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Drain with gasket nut (1 1/2" NPT) included with the pan
Installation Instructions
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Check your floor depth
Measure the thickness of your floor, subfloor, and insulation. You want at least 1 3/8" from the top of the surface to the top of the factory floor so the pan sits flush. In the video, the build measures 1 1/2". -
Check under and above the floor
Look under the van where the drain will sit and confirm it’s clear of struts, fuel lines, and brake lines. Then look up top and make sure cabinets won’t block your shower curtain. -
Mark and cut the opening
Measure and mark a 22" x 28" rectangle, then cut inside the line. Cutting inside the line leaves room to adjust the fit. Remove the cutout piece. -
Dry-fit the pan
Set the pan in the opening to check the fit before anything gets glued. -
Mark the drain hole
With the pan dry-set, measure and mark the center of your drain location. Pull the pan back out. -
Drill the drain hole
Drill a 2 3/4" hole at your mark. -
Prep the drain
The drain drops in from the top, and the gasket nut threads on from the bottom. The drain is 1 1/2" NPT, so any 1 1/2" threaded fitting will connect to it. -
Silicone, prime, and set the pan
Pull the pan out and run a small bead of silicone adhesive all the way around the edge. Treat the metal with primer, install the drain, and set the pan. -
Let it cure and plumb
Let the pan dry overnight. A little weight in the pan helps while it sets. Then plumb to your drain. You’re installed.
What In-Floor Pans Offer
In-floor shower pans integrate a dedicated shower area into your van's cabinetry layout, sitting flush with the floor while keeping water drainage simple. They work best in layouts with a dedicated bathroom zone and sufficient cabinetry structure to support them. Pans come in two sizes: regular pans for comfortable standing room, and slim pans for space-constrained bathrooms.
Unlike standing stalls that demand full enclosure framing, in-floor pans let you use whatever containment works for your space—a simple shower curtain, a folding enclosure above it, or even an exterior shower port paired with minimal interior spray.
Regular vs. Slim Pans
Regular pans offer wider base and more comfortable standing space, useful when your bathroom layout can spare the footprint. Slim pans fit tighter bathrooms while maintaining functional drainage and foot room. Both versions slope toward a drain point for gravity drainage or can be fitted with accessible drain valves positioned on the warm side of the van wall.
Choice depends on your layout. In a Sprinter with generous bathroom cabinetry, a regular pan feels natural. In a Transit or ProMaster with tighter footprints, a slim pan preserves walkway space while still providing functional bathing.
Drainage and Water Management
The critical detail with in-floor pans is slope: drain positioning should direct water toward the lowest pan corner at minimum 1/4 inch per foot. This prevents standing water that causes odor, algae growth, and freeze damage in cold storage.
Some builders integrate a small in-floor pan for pre-rinse, paired with the main shower curtain enclosure above it—this simplifies drain routing and prevents water from pooling in low spots.
Proper system design allows gravity draining directly to gray tanks, or includes accessible drain valves if gravity routing isn't possible. Position drain valves on the warm (interior) side of the van wall so they don't freeze in winter storage.
Installation Considerations
In-floor pans require solid floor framing and proper waterproofing around the pan perimeter. The installation itself is straightforward—positioning the pan, securing it, and running drain lines. Total build time is shorter than a full standing stall since you're not framing walls or permanent enclosures.
Water containment depends on whatever enclosure you pair with the pan. If using a shower curtain, ensure it's high quality and sealed at corners. If pairing with a FOLD Shower or other rigid enclosure above the pan, water management becomes more predictable.
Space and Layout Integration
In-floor pans work well when your bathroom design already includes a dedicated zone. They don't consume vertical wall space the way standing stalls do, making them compatible with shelving, medicine cabinets, or towel racks above. This lets your bathroom stay functional beyond just showering.
Slim pans in particular allow bathrooms in short-wheelbase vans to include a shower without dominating the entire room, preserving space for toilet, sink, and storage.
Winterization
Before sustained freezing, drain all water from the pan completely. This is non-negotiable: standing water in the pan will expand and damage plumbing, seals, and the pan itself. Accessible drain valves positioned on warm walls make this straightforward—a quick release before storage prevents freeze damage.
GoCode Slim In-Floor Shower Pan
