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Water Safety & Flow Control



Stainless Steel, Wye-Pattern Strainers

Lead Free* Models Available


1/2 to 3 in. (15 to 80mm)


Series 87SI Stainless Steel, Wye-Pattern Strainers feature a wye-pattern, stainless steel body with threaded (Model 87SI-T) or socket weld (Model 87SI-SW) connections, stainless steel screen, stainless steel retainer cap with PTFE gasket, and blow-down plug. Series 87SI has machined seat that allows the screen to be self-aligning to assure a perfect fit. Maximum Pressure (non shock): 720psi (49.7 bar) @ 100°F (38°C) WOG, 300psi (20.7 bar) @ 400°F (204°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.

Additional Information

Danger – Scalding Lurks!

Every year, thousands of people suffer serious thermal shock or scalding injuries in their bathtubs, sinks and showers.

Click here for informative resources to help you protect against these dangers.

Learn About

Thermostatic Mixing Valves

Every year thousands suffer injuries as a result of hot water scalding and thermal shock injuries. Thermostatic mixing valves protect against these dangers.

To learn more about thermostatic mixing valves and how they work, click here.