Automatic drain

The Reverse-A-Clean (RAC) RAC 5 SwitchTip is designed for narrow surfaces and thicker materials

They are available with different flow rates at different psi

The 24K892 Stainless Steel Outlet Manifold Elbow Kit from Graco that include:

SIMPSON® HOT WATER SPRAY GUN 5000 PSI 1/4" x 50' Automatic drainThe SIMPSON hot water spray gun is designed to replace or upgrade your existing spray gun for your pressure washer. The 80178 is rated up to 5000 PSI and comes equipped with threaded M22 fitting and quick connect adapters. Its ergonomic design and easy pull trigger help reduce hand fatigue for all day use. The 80178 is designed to fit most gas pressure washers and rated up to 5000 PSI. Description: Rated up to 5000 PSI Ergonomic design and easy pull