The 2" E-Series Diverter Valve Cap is an essential replacement part designed for the Marquis E-Series spas produced from 2015 to 2018. This cap securely covers the diverter valve, ensuring a tight fit and preventing water leakage. Crafted from durable, lasting materials, the gray valve cap helps protect the valve from debris and damage, extending the lifespan of your spa's components. If your current valve cap is worn or damaged, this replacement cap provides the perfect solution to keep your spa functioning at its best.