Unique Lighting Systems - PR18-NL - Proton® 18 inch stem Elements Series No Lamp 224052 Unlike a conventional 24 VAC

Unlike a conventional 24 VAC solenoid that must remain energized while a valve is open

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The diaphragm is the flexible internal component that helps the valve open and close as pressure changes across the valve chamber

The title identifies it as a 3-1/2 in

Unique Lighting Systems - PR18-NL - Proton® 18 inch stem Elements Series No Lamp 224052 Unlike a conventional 24 VACSpec Sheet The Proton fixture features a 5 inch shroud and is the perfect selection for every intimate garden space, planter area or pathway. Features include, Marine grade A360 alloy construction, Proprietary E Shield process provides 5 distinct layers of protection against corrosion, 15 HUB ready wire lead, 1' FLEX GOLD Auxiliary Lead, larger composite stake with molded brass threaded insert. White reflection panel under shroud for greater