Road Shower 4S This is the updated road shower 4s. 4 gallons - 65 psi. Sku rs04s Road shower is like adding plumbing to your vehicle rack With the road shower you can have instant and easy access to pressurized water wherever you go Hot or cold, the road shower has many uses: For extra drinking water From the camp hose for dishes, a pressurized jet to rinse off dirty gear, a gentle spray for the pet