Bathroom & Kitchen Plumbing in Arlington, VA

Bathroom Remodel: Plumbing Planning Checklist

Existing Rough-In Locations

Moving a toilet, tub, or shower drain even a few feet can mean cutting into the slab or subfloor. Knowing this early lets you decide whether a design change is worth the added cost, or whether keeping fixtures in their current position saves significantly on both budget and timeline.

Supply Line Capacity

Adding a second shower head, a soaking tub, or a double vanity increases simultaneous demand on the supply lines — older Arlington homes sometimes need line upsizing to support a more ambitious fixture plan than the original plumbing was designed for.

Inspection Sequence

Rough-in plumbing typically needs county inspection before walls are closed up. Scheduling this correctly in the renovation timeline avoids the costly mistake of closing walls too early and having to reopen them.

Kitchen Remodel: What Changes When the Sink Moves

Relocating the Sink

Moving a sink means extending supply and drain lines — more involved in a slab-foundation kitchen than one with basement access below for running new lines. This is worth budgeting for early, not discovering mid-project.

Island Sinks and Venting

An island sink typically needs a specific venting solution, like an air admittance valve or a loop vent, since a traditional vent stack often isn't accessible from an island's location. This needs to be planned into the design, not treated as an afterthought once cabinetry is already ordered.

Dishwasher and Disposal Coordination

Confirming supply, drain, and electrical are all coordinated for a new dishwasher and disposal location prevents the common remodel headache of appliances not quite lining up with the rough-in once they arrive.

Adding a Basement Bathroom

A basement bathroom is a great use of space, but it comes with one specific challenge most other additions don't have: getting waste to flow uphill, since a basement floor typically sits below the main sewer line leaving the house.

Upflush and Ejector Systems

A macerating upflush toilet system or a sewage ejector pump handles this by grinding and pumping waste up to the main line level. The right choice depends on the specific fixture layout planned — sinks and showers can sometimes drain via gravity to a sump-style system while the toilet uses an upflush unit.

Converting a Tub to a Walk-In Shower

This popular renovation involves more plumbing work than the finished result suggests. A shower pan needs proper slope toward the drain across its entire footprint, which sometimes means relocating the drain from the tub's original position to better suit the new shower dimensions. Walk-in showers often use a different valve height and configuration than a tub-shower combo, particularly for larger or multiple shower heads, which typically means opening the wall to reposition the valve correctly.

Double Vanities and Laundry Relocation

Upgrading to a double vanity means running a full second set of supply and drain lines, plus confirming venting works for two fixtures rather than one — easy to overlook in a DIY plan but important for long-term function. Relocating laundry hookups, especially to an upper floor, adds the consideration of leak protection: a drain pan with its own drain line, given the water damage risk to floors below if a hose connection ever fails.

Frequently Asked Questions