A pre rinse faucet is an industrial-style faucet designed for food service kitchens in order to wash and clean dishes before they enter a commercial dishwasher. While pre-rinse units are manufactured by several companies, the design and styles are very similar. There are a few basic features that apply to all pre-rinse faucets no matter the manufacturer. This article helps users better understand what a pre-rinse faucet is and covers the basics of a standard spring style unit.
Spring Style Pre Rinse Basics:
Pre-rinse units can have different faucet body styles depending on the installation. Faucet bodies for pre-rinse units are either deck or wall mounted and designed for sinks, walls or counter setups. 8″ center wall mount is the most common style found on large compartment sinks.
Pre rinse units have a riser pipe assembly that stems from the faucet body. Riser are usually 3/8″ NPT and made of chrome plated brass pipe. Some companies have designed an easy-install connection that connects the 3/8″ NPT pipe riser to the threaded area of the faucet body where the spout usually goes. Many pre rinse units come with a wall support bracket for the riser to prevent bending and snapping when under tension.
At the top of the riser assembly lies an overhead spring. The spring slips over an adapter called the ‘spring body’ which screws on directly to the top of the riser pipe. The spring body also serves an an adapter to connect the spray hose to the riser pipe. The function of the spring is to support and allow free movement of the spray hose.
Pre rinse spray hoses are generally made of flexible stainless steel wrapped rubber hoses and available in several lengths depending on the unit – some are vinyl or plain uncovered rubber. Common lengths of pre rinse hoses include: 36″, 44″, 56″, and 60″.
Pre-rinse spray valves typically connect to the hose with the help of a hand-held wand. The wand is what the user grips while squeezing the trigger of the spray valve. The wand usually comes connected to the pre rinse spray hose, though some companies like T&S Brass have developed more ergonomic spray valves with the wand built in.
Spray valves, also known as spray nozzles or spray heads, are the most used component of any pre rinse faucet. Since the EPAct of 2005, pre rinse spray valves in the USA cannot exceed the flow rate of 1.60 Gallons Per Minute (GPM). Most manufactures produce pre rinse spray valves with a common flow rate of around 1.40 GPM. There are many low-flow spray valves on the market that use around 0.60 GPM. Low-flow spray valves are more environmentally friendly and can help save hundreds of thousands of gallons of water per year. Another benefit of low-flow pre rinse spray heads are the reduction of gas energy costs from hot water usage.
|Pre rinse units can also be found with an optional add-on faucet attachment that allows the pre rinse to function like a traditional faucet when not using the hand-held spray nozzle. Add-on faucets are found in between the faucet body and riser assembly. Spout sizes and lengths vary depending on the brand, but companies like T&S Brass, Chicago Faucets or Fisher all offer several spouts for any installation need.|