Whale 3/4" Hot Water Heater Drain Valve

The Whale 3/4" Hot Water Heater Drain Valve (MPN 73123) is an essential replacement component for marine water heating systems. After years on the water, any boat owner knows that reliable freshwater systems are non-negotiable—whether you're anchored in cold coastal waters or running extended offshore passages. This drain valve is engineered as a direct replacement for most Whale water heaters, allowing you to maintain peak performance and protect your onboard hot water system from corrosion and sediment buildup.

Designed with the 3/4" port size standard to Whale marine heating systems, this drain valve provides controlled water discharge for routine maintenance and winterization procedures. The valve's compact footprint (2 x 2 x 3 inches) and lightweight construction (0.1 lbs) make it easy to access and install in tight engine compartments typical of modern cruising vessels. Its straightforward mechanical design ensures years of reliable service without electronic complexity—a critical advantage in the salt-air marine environment where corrosion and component failure can strand you miles from port.

This replacement drain valve is ideal for boat owners performing seasonal maintenance, winterization, or system repairs on Whale brand water heaters. Whether you're draining your system before winter lay-up or flushing accumulated minerals during spring commissioning, a functioning drain valve is essential to extending heater lifespan and preventing freeze damage in cold climates. Keep a spare on board—a failed drain valve can complicate what should be a routine maintenance task, and replacement parts in remote anchorages are seldom available.