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The Watts GRD-690 is a shallow planter drain designed specifically for green-roof systems where subsurface drainage is required
Co-plane rail straps or alignment features for consistent installation over long runs
the pressure range can be adjusted from 25 to 75 psi (172 to 517 kPa) with the standard setting at 70 psi (483 kPa)
They are only able to ship with a qualifying Wellcraft System purchase
Watts LFF115 THD 11/2 - Part of the LFF115 Series chat-hdpe The Watts GRD-690 is aThis 1 1 2 inch ACV is armed with ArmorTek, a patented 3 part advanced epoxy coating system designed to limit both microbial induced (MIC) and exposed metal substrate corrosion. This pressure reducing control valve is designed to automatically reduce a fluctuating higher inlet pressure to a constant lower downstream pressure regardless of varying flow rates. The quick closing action of the valve limits possible damaging high inlet pressure from
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