FL Shower Valve & Anti-Scald Guide

Shower Valve & Anti-Scald Compliance Guide

ASSE 1016 selector, 120°F FL code checker, ADA shower valves, pressure-balancing vs thermostatic comparison.

Pressure-Balancing vs Thermostatic

Pressure-Balancing Valve (ASSE 1016 Type P) — FL Code Minimum: Balances hot/cold ratio when pressure changes (toilet flush). Limits temperature swing to ±3°F. Max temp set via internal stop. Does NOT hold exact temperature. Required in all FL residential showers since 2006 FBC adoption. Best for standard residential, budget remodels, most FL homes. Valve $150–$400; install $350–$650. Examples: Moen Posi-Temp, Delta Monitor, Kohler Rite-Temp. Limitation: temp drifts with incoming supply temp changes (seasonal FL variation).

Thermostatic Valve (ASSE 1016 Type T): Maintains exact temperature within ±1°F regardless of pressure OR supply temp changes. Separate volume and temperature controls. Ideal for multi-spray systems, steam rooms, commercial. Required in FL medical/assisted living. Best for medical facilities, elderly, luxury, multi-outlet. Valve $400–$1,500+; install $600–$1,200. Examples: Kohler DTV, Moen ioDigital, Hansgrohe iSeries, Symmons Temptrol. Advantage: memory temperature; water-saving (no warmup wait).

Combination Thermostatic + Volume Control: Thermostatic cartridge + separate diverter/volume valves. Allows multiple outlets at precise temperature. Most commercial/hospitality installs use this. $600–$2,500 system; install $900–$2,000. Examples: Kohler DTV+, Moen U by Moen, Grohe Grohtherm Cube. FL note: required for 3+ outlets in hospitality settings.

Anti-Scald Temperature Compliance

FL's ambient water temp (72°F+) means a tankless WH needs less rise, but Legionella control still requires 120°F at the WH. Solution: ASSE 1016/1070 mixing valve between WH and distribution.

Temperature Risk Reference Chart

• 100°F — Comfortable bath temp
• 105°F — Hot tub maximum (CPSC)
• 110°F — Discomfort, prolonged pain
• 120°F — FL code max at fixture; ~5 min burn time
• 125°F — 1st degree burn in 2 minutes
• 130°F — 1st degree burn in 30 seconds
• 140°F — 1st degree burn in 5 seconds
• 150°F+ — Instant scalding, life threat

FL Hot Water Strategy: 120°F Rule

• Store/heat at 140°F minimum — kills Legionella bacteria. Tank WH set to 140°F even if you add a downstream mixing valve (FL DOH recommendation).
• Install ASSE 1070 mixing valve at WH — reduces mixed supply to 120°F before distribution. Required in FL medical/senior facilities; strongly recommended for FL homes with children or elderly.
• ASSE 1016 shower valve limits to 120°F at fixture — internal hot stop, set during installation, requires tool to adjust.
• For vulnerable users: set shower valve stop to 110°F — pediatricians recommend 110°F max for children under 5; mobility-impaired users may not react fast enough at 120°F.

FL Shower Valve Code Requirements

Florida Building Code adopts ASSE 1016 for all shower and tub/shower combinations — required since the 2004 FBC edition.

• FBC R2708.1 / FPC 424.3 — Anti-Scald Mandatory: All shower/tub valves must be ASSE 1016 listed. Applies to new construction AND fixture replacement. Max 120°F at outlet. No exceptions for owner-occupied single-family.
• ASSE 1016 Internal Stop Setting: Hot stop must be set to prevent outlet above 120°F; factory-set but field-verified. Plumber responsible for setting and documenting at rough-in.
• FL Medical/Assisted Living — ASSE 1070 Required: AHCA requires ASSE 1070 point-of-use mixing valves in all patient/resident bathing areas in addition to ASSE 1016 at the fixture. Max 110°F in care settings.
• Permit for valve replacement: FL Statute 489.105(3)(m) exempts minor repairs (washer replacement). Replacing a valve body/cartridge that changes anti-scald function IS a plumbing alteration requiring a permit in most FL jurisdictions — check with your building department.
• ADA Accessible Showers: Roll-in and transfer showers must have ASSE 1016 thermostatic or pressure-balancing valve with hand shower on sliding bar (48"–72" height). Controls operable with closed fist, reachable from outside.
• FL Short-Term Rental / Airbnb: DBPR requires anti-scald compliance for vacation rentals; annual inspection may check valve function; non-compliant valve = potential license suspension.
• Water Pressure Requirement: ASSE 1016 valves require minimum 20 PSI dynamic pressure to function. FL well water systems must have properly sized pressure tank; low pressure bypasses the anti-scald mechanism on some models.

Shower Valve Compliance Checklist

• Valve is ASSE 1016 listed (marked on body or packaging)
• Hot stop set to max 120°F (verify with thermometer)
• For medical/elderly: ASSE 1070 mixing valve installed at WH
• Permit pulled if replacing valve body (check local jurisdiction)
• ADA controls reachable from outside shower (if applicable)
• Minimum 20 PSI dynamic water pressure at shower valve
• Expansion tank on water heater (if closed system — FL code)

FL Shower Valve Brands — Quick Reference

• Moen Posi-Temp (2510) — best-seller FL; easy cartridge swap
• Delta Monitor 1300/1400 — durable; common in FL tract homes
• Kohler Rite-Temp (K-304) — solid PB; fits many trim kits
• American Standard Serin — value tier; good FL climate rating
• Symmons Temptrol (S-96) — commercial grade; FL hotels use
• Hansgrohe Ecostat S — premium thermostatic; FL luxury builds
• Kohler DTV+ System — digital thermostatic; multi-outlet FL

FL Shower Valve — Cost Guide