American Standard Safe-T-Heater compatible heater

Upgrade your whirlpool experience with the Whirly Bros Inline Pressure Switch bathtub heater — a Balboa Water Group design engineered to deliver dependable warmth and simple retrofit compatibility. At 1.5KW and 115V, this heater maintains a comfortable, spa-like temperature throughout long soaks, so you never have to reset the thermostat mid-drench.

Why this inline heater stands out

• Reliable, steady heat — targeted 1.5KW at 115V delivers consistent warmth, reducing temperature swings and eliminating chilly surprises during a soak.
• Smart safety thermostat — automatic limit capped at 104°F (40°C) keeps water feeling soothing without overheating.
• Rugged durability — stainless steel housing paired with a robust Incoloy heating element stands up to humid, hot tub environments for longer life.
• UL recognized — safety certified for peace of mind, backed by Balboa’s engineering pedigree.
• DIY-friendly retrofit — fits most standard 1.5" Union Tail fittings with 7" flange-to-flange spacing; includes fittings and clear instructions for straightforward installation.
• Broad compatibility — a practical replacement for American Standard Safe-T-Heater configurations and a wide range of whirlpool tubs, including Hydro-Quip Compact Series, Jacuzzi RapidHeat, and Pure Heat lines.

Designed for real-world tubs

This inline heater is the practical upgrade for older or slow-to-heat whirlpool tubs that struggle to hold a steady temperature. It delivers lasting warmth across a broad spectrum of American Standard Whirlpool models (including many E, L, V, and W series variants) and other popular configurations, enabling you to retrofit without changing your tub’s plumbing layout.

What you gain with a simple retrofit

• Longer, more comfortable soaks — consistent warmth lets you unwind without watching the thermostat.
• Cost-effective upgrade — extends the life of your existing whirlpool setup without a full system replacement.
• Assured safety and reliability — UL safety certification and Balboa’s proven engineering.
• Hassle-free installation — straightforward DIY install with clear guidance and included fittings.

Installation and use

Designed as a direct replacement for many American Standard Safe-T-Heater configurations, this inline heater enables a seamless upgrade without modifying your tub’s plumbing. Its universal 7" flange-to-flange spacing and 1.5" Union Tail compatibility mean it fits a wide array of setups, making it an accessible path to warmer baths in cooler climates or in homes with longer, more indulgent soaks.

Reliability you can trust

Backed by UL safety certification and a 1-year Balboa-backed warranty, this heater isn’t just a temporary fix — it’s a durable solution built to enhance your bath time for seasons to come. If you’re seeking a dependable, easy-to-install heater that preserves your existing tub layout while delivering steady warmth, this inline option is the thoughtful upgrade your Safe-T-Heater-equipped tub deserves.