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Backflow Prevention


Cast Steel, Wye-Pattern Strainers

Lead Free* Models Available


1/2 to 2 in. (15 to 50mm)


Series 88-CSI Cast Steel Wye-Pattern Strainers feature a wye-pattern, cast steel body with threaded (Model 88-CSI-T) or socket weld (Model 88-CSI-SW) connections, stainless steel screen, cast steel retainer cap and blow-down plug. Series 88-CSI has machined seat that allows the screen to be self-aligning to assure a perfect fit. Maximum Pressure (non shock): 1480psi (102 bar) @ 100°F (38°C) WOG, 600psi (41 bar) @ 489°F (254°C) WSP.

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Disclaimer: Watts product dimensions in U.S. customary units and metric are approximate and are provided for reference only. For precise measurements, please contact Watts Technical Service. Watts reserves the right to change or modify product design, construction, specifications, or materials without prior notice and without incurring any obligation to make such changes and modifications on Watts products previously or subsequently sold.

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*The wetted surface of this product contacted by consumable water contains less than 0.25% of lead by weight.

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