High-flow non-thermostatic bath & shower faucet with 17.2 LPM (4.5 GPM) output. Pressure-balanced valve prevents scalding. Single/dual-handle control + diverter for tub or shower. Solid brass, ceramic disc, chrome finish. Ideal for powerful showers & fast tub fill. $180–$450.
A non-thermostatic bath and shower faucet delivering 17.2 liters per minute (LPM) — equivalent to 4.5 gallons per minute (GPM) — is a robust, high-performance plumbing fixture designed for luxurious water flow and reliable functionality in residential bathrooms. Unlike thermostatic valves that automatically maintain set temperatures, this type uses a pressure-balancing mechanism to reduce sudden temperature swings caused by flushing toilets or running appliances, while still requiring manual adjustment of hot and cold water via handles.
This faucet system is perfect for larger households, low-pressure water systems, or anyone who values strong, invigorating showers and rapid bathtub filling. It typically includes:
- A wall-mounted mixing valve (exposed or concealed)
- A tub spout with 6–8″ reach
- A shower arm outlet
- A 3-way diverter (knob or lever) to switch between tub fill, shower only, or both
- Trim kit (handles, escutcheon plates) in polished chrome, brushed nickel, matte black, or oil-rubbed bronze
Core Features & Technology
| Feature | Details |
|---|---|
| Flow Rate | 17.2 LPM – powerful stream for full-body coverage and fast filling |
| Valve Type | Pressure-Balanced (Non-Thermostatic) – Diaphragm or piston adjusts flow to stabilize temperature |
| Handles | Single-lever (volume + temp) or dual-handle (separate hot/cold) |
| Cartridge | Ceramic Disc – quarter-turn, drip-free, 500,000+ cycle durability |
| Material | Solid Brass Body – corrosion-resistant, lead-free (NSF/ANSI 61) |
| Installation | 1/2″ NPT inlets; rough-in valve depth 2.5–3.5″ from stud |
| Diverter | 2- or 3-function (tub / shower / shared) |
| Finish | PVD or electroplated for scratch & tarnish resistance |
| Standards | ADA-compliant lever handles; WaterSense variants available |
Top Models with Full Descriptions
- Kohler Purist® Bath & Shower Trim (K-T14422-4-CP) Minimalist elegance meets high performance. The pressure-balance valve delivers 17.2 LPM through a sleek 6.5″ non-diverter tub spout and overhead shower. Single lever handle with temperature memory. Vibrant® polished chrome finish resists corrosion. Pair with Rite-Temp® valve (K-304-KS).
“Clean lines, strong flow — feels like a boutique hotel.” Price: ~$300–$400
- Delta Monitor® 17 Series Tub/Shower (T17459-SS) Legendary reliability with DIAMOND™ Seal Technology — lasts 2x longer than industry standard. Pressure-balanced valve maintains temp during pressure drops. 17.2 LPM through 5.75″ pull-up diverter spout. Stainless steel finish. Includes rough-in valve with stops. Price: ~$280–$350 | Best Value
- Moen Weymouth® Two-Handle Bath/Shower (TS32102) Traditional cross handles with modern Posi-Temp® pressure balancing. 17.2 LPM flow via 8″ high-arc spout. Oil-rubbed bronze or chrome. M-PACT® system allows future trim updates without valve replacement. Price: ~$350–$480
- Grohe Grandera® Pressure Balance Trim (35058000) German precision with StarLight® chrome. Dual ceramic valves + integrated diverter. 17.2 LPM for spa-like power. Wall-mount, concealed installation. Price: ~$400–$550
Pros & Cons
| Pros | Cons |
|---|---|
| ✅ Powerful 17.2 LPM flow | ❌ Manual temp adjustment |
| ✅ Prevents scalding/shocks | ❌ Higher water usage |
| ✅ Affordable vs. thermostatic | ❌ Not ideal for extreme conservation |
| ✅ Easy retrofit install | ❌ Cartridge may need replacement in 7–10 yrs |
Installation & Maintenance
- Rough-In: Use PEX, copper, or CPVC; secure valve with screws.
- Tools: Pipe cutter, adjustable wrench, Teflon tape.
- Pro Tip: Install integral stops for easy future servicing.
- Clean: Wipe with mild soap; avoid abrasives on finishes.
- Cartridge Life: Replace every 7–10 years (Kohler K-8304, Delta RP46074, etc.).
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